Antenna design jobs

...ultra-low-power GPS, RFID reader IC, power-path management and secure element for key storage. • Power strategy: harvest energy from the solar cell, switch gracefully to an internal Li-ion/Li-poly pack at night, and hit an ultra-low sleep current budget. • Security & anti-tamper: harden the firmware, design intrusion switches and defeat-detection circuitry so any attempt to pry the enclosure or shield the panel is reported. • Mechanical integration: advise on housing dimensions and antenna placement so metal parts don’t cripple RF performance. • Prototype and test: once schematics and Gerbers are complete, iterate until we have a field-ready sample that meets the above goals. We can discuss exact specs such as operating cycles, GPS up...

...hysteresis, repeatability, dynamic cycling). Result: GO WITH CONDITIONS - Preliminary BOM for the sensor, display, battery and haptic parts - Proof-of-concept firmware on an ESP32-S3 dev board (force, rep counting, touch UI), as reference - External enclosure STEP. A mechanical engineer works in parallel on the internal layout. ARCHITECTURE (already selected) - MCU: ESP32-S3-WROOM-1-N16R8 (PCB antenna, native USB for programming) - Force: 50 kg 4-wire full-bridge load cell -> HX711 on its own LDO rail - Power: USB-C + SRV05-4 ESD -> BQ24075 charger (power path) -> 2x RT9080-33 LDO (digital / analog). No switching regulators. - Battery: 1S Li-Po ~500 mAh, MAX17048 fuel gauge - Display: 1.58" AMOLED 228x460, CO5300 + CST820 touch, 31-pin FPC, QSPI. Wake on touch, no ...

...through 2.9 mm non-plated holes - One end has a sealed M8 panel connector (power) and an SMA bulkhead antenna connector - Three LED light-pipe windows on the top **What I need you to do** 1. Review and improve the concept: reduce size, wall thickness, and the screw ears 2. Design the M8 stud anchoring and the thread so it handles mounting torque and pull-out 3. Make sure the path from the machine to the PCB is stiff. The board measures vibration up to about 6 kHz, so the mounted assembly's first resonance must stay well above that. Please explain how you've checked this. 4. Seal design for IP67: the body-to-plate joint, the M8 connector, the SMA, and the LED windows 5. Allow for an antenna area, conformal coating, and a desiccant pocket 6. Battery ...

...the project I'm building a desktop air quality monitor using a Seeed Studio XIAO EE05 board, a 4.26" e-paper display, an SCD41 CO2 sensor and a flat LiPo battery. Scope of work - Research dimensions, mounting holes and connector positions for each component using the spec sheets and attachments below - Design the enclosure to the guidelines below - Deliver print-ready STL files and editable source files - Provide support through test prints to resolve any fitment or tolerance issues Design requirements General - Simple, clean, sturdy and minimal aesthetic - Assembly with M2 self-tapping screws, no glue Base - Battery and EE05 board sit in the base of the unit - EE05 board sits in the back left corner above the battery, with clearance to route the sensor cable...

...OBJECTIVE Design and develop an electronic module capable of receiving the VHF signal at **162.425 MHz**, demodulating the NFM transmission, recovering the baseband signal, and demodulating the **AFSK/FSK data used by SAME (Specific Area Message Encoding)**. The module shall cover the complete signal chain: **Antenna/RF Input → RF Filtering → VHF Receiver → NFM Demodulation → Baseband Conditioning → AFSK/FSK Demodulation → Digital DATA_OUT** The final output shall be ready for connection to an external microcontroller that will implement the SAME protocol decoder. Implementation of the complete SAME message parser and earthquake alert logic is outside the scope of this development. --- ## 2. RF REQUIREMENTS ### 2.1 Frequency Primary o...

...task is the board layout, design review, and preparation of full manufacturing data. A schematic review is required to confirm correctness before placement begins. Board Architecture: The board contains two functionally independent sections, which must be physically separated to avoid mutual interference: - Encoder section: STM32G474 microcontroller and its supporting peripherals, two AM26LV32E differential line receivers and ESDA6V1SC6 ESD protection device. - Bluetooth section: EBYTE E73-2G4M08S1CX BLE module (nRF52840-based, pre-certified) — the IPEX/ antenna connector is integrated into the module itself, so no antenna connector needs to be placed on the PCB, supporting peripherals and USBLC6-2SC6 ESD protection device (on USB lines). No RF/antenna...

Custom 3-PIR GSM Anti-Theft Security Alarm with SMS, Call & Relay PROJECT DESCRIPTION: I am looking for an experienced embedded hardware and firmware developer to design and develop a custom human motion / anti-theft security alarm using an ATmega328P (Arduino-compatible) microcontroller. The device will use 3 external PIR motion sensors connected to the main PCB through long cables. The main feature is a selectable PIR detection threshold of 1, 2, or 3 sensors. This will help reduce false alarms. MAIN PIR LOGIC: The device has: * PIR 1 * PIR 2 * PIR 3 The user can select the required number of PIR sensors that must detect movement. Threshold 1: Any one PIR becomes active = intrusion confirmed. Threshold 2: Any two PIRs become active = intrusion confirmed. PIR1+PIR2, PI...

...Independent Final Review of Completed KiCad Board I am looking for an experienced electronics/PCB engineer to provide a **final independent second opinion** on a completed 4-layer PCB before I manufacture the first five assembled prototypes. **Budget: approximately £20–£30 fixed price.** This is **not a design-from-scratch job** and I am not expecting a lengthy formal engineering report for this budget. What I want is an experienced engineer to spend some focused time reviewing the completed design, identify any obvious or serious remaining risks, and tell me whether they would personally be comfortable sending the board for manufacture. ### Current status The board is **SP-MB1 Rev B.1** and has already undergone extensive development and one indepe...

I need to push NFC performance well beyond the usual tap-to-pay distance. The task is to design a tuned 13.56 MHz antenna, compatible with common NFC controller ICs, that can reliably achieve a read/write range greater than 30 cm while staying within regulatory field-strength limits. To succeed you should be comfortable with loop or spiral coil design, impedance matching, and low-frequency RF simulation. A solid grasp of ISO/IEC 14443 or 15693 coupling mechanics is essential because I want to keep the front-end electronics standard and let the antenna do the heavy lifting. Deliverables • Optimised antenna geometry (model, calculations, and rationale) • Schematic and PCB layout files (KiCad or Altium) • Complete manufacturing package...

I need a simple, single-board PCB layout created from an already completed and fully tested Fritzing (.fzz) project. The circuit logic, components, and pin mappings are 100% verified on a physical breadboard. This is a very quick micro-task for an experienced electronics engineer. The design is an ultra-low-power Smart Irrigation Sensing Node using an all-3.3V power architecture. Key Specifications & Pin Mapping: • Microcontroller: Arduino Pro Mini (3.3V variant) • Radio Module: LoRa Ra-01 (Antenna area must be kept completely clear of copper traces and ground planes). Pin connections required: NSS to D10, RST to D9, DIO0 to D2, plus standard hardware SPI lines (D11, D12, D13). • Power Input: Direct 3.2V LiFePO4 Battery connection to the Arduino VCC rail (...

We are looking for an experienced KiCad PCB layout engineer to design and route a compact, battery-efficient 2-layer ESP32-WROOM-32E board for our smart IoT device. We have already completed the circuit engineering, component selection, net map, and mechanical envelope. You will be provided with: 1. A comprehensive 19-page PDF Engineering Specification with exact pinouts, power topologies, and routing rules. 2. A complete Excel BOM with exact footprint definitions, component MPNs, and Indian distributor references. 3. Legacy KiCad board files containing the exact board outline (52.98 mm × 34.00 mm with stepped corner) and coordinates for 6 mechanically locked components. SCOPE OF WORK: 1. Schematic Capture / Verification in KiCad 7 or 8: - Implement clean schematic matchi...

...ESP32-S3 Low-Power Audio Recorder PCB (Dual Variant Prototype Layout) Job Description I am looking for an experienced electronics design engineer to create a custom, compact PCB layout based on the ESP32-S3 microcontroller. The target system is a battery-powered, offline audio data-logger intended to record sound locally to a microSD card during specific daily schedules and securely upload files to a remote server over Wi-Fi during a specific time window. To optimize power consumption and sound performance, I require TWO (2) separate PCB layout variations based on the same core schematic template. Scope of Work & Deliverables The freelancer will provide full design files (EasyEDA Pro/KiCad) alongside two separate production packages completely optimized for automate...

...for an O-RAN 7.2x radio architecture. The objective is to design, implement, integrate, optimize, and validate the complete real-time digital signal-processing chain rather than isolated FPGA blocks. The scope covers O-RAN 7.2x/eCPRI fronthaul processing, IQ compression/decompression, FFT/IFFT and cyclic-prefix processing, resource and antenna mapping, 2×2 and 4×4 MIMO, precoding and digital beamforming, DUC/DDC, channelization, interpolation/decimation, digital filtering, CFR, DPD, calibration, gain/phase correction, multi-carrier processing, timing/synchronization, and high-speed ADC/DAC interfaces. The engineer will be responsible for FPGA architecture, RTL/HLS/IP implementation, block integration, clock-domain and data-path design, fixed-point opti...

...optimize an existing PCB trace antenna design, specifically for the EM4325 IC. The project involves addressing performance issues, including limited reading range and angle sensitivity, while ensuring the following: - Detailed Review: Analyze the current PCB trace antenna design for potential improvements. - Optimization: Redesign or adjust the PCB to enhance performance, particularly in terms of reading range and angle sensitivity. - Shape Variations: Provide two shape designs for the PCB to explore different form factors. Provide two different overall PCB board shape designs/form factors incorporating the antenna design, to explore different physical board configurations. - LED Connection Fix: Correct a missing LED connection in the...

Hello, I am looking for an experienced electronics/PCB engineer to design a compact production-ready PCB. This is a redesign of a previous project, so manufacturability, component selection, reliability and proper engineering are particularly important. Main requirements The PCB must include: * ESP32 with Zigbee / Thread / Matter support * Wi-Fi support is mandatory. * Bluetooth support is mandatory. * The selected ESP32 must provide sufficient RAM and flash memory with reasonable headroom for the networking stacks and our application firmware. * ESP32-C6 may be considered, but the designer may propose a more suitable Espressif device if technically justified. * The final MCU/module selection must be agreed before PCB layout. * USB-C port * Used for firm...

Hi there, I am looking for an experienced PCB design engineer to lay out a small, high-power LED strobe controller board and prepare the manufacturing files for JLCPCB Economic PCBA (surface-mount assembly) [1.2]. The design is completely finalized conceptually, and I have attached the Engineering Requirements Document (ERD) and the Final Schematic Pinout Map below to serve as your definitive layout blueprint. Project Deliverables Required: Complete schematic and 2-layer PCB layout using EasyEDA (preferred) Verified BOM (.csv) matched to standard, low-cost components from the JLCPCB parts catalog. Formatted component placement centroid file (). Production-ready Gerber Fabrication Bundle (.zip) [1.2]. Core Structural Criteria...

I need an experienced telecommunications engineer to carry out a full on-site survey that will feed directly into a forthcoming 4G/5G network installation using Huawei equipment. Your visit should capture every physical and radio-frequency detail required for a clean first-time deployment, from antenna mounting points through to power, grounding and backhaul availability. Alongside the field work, I will rely on you to create a concise technical report: clear photos, measured drawings, line-of-sight checks, interference observations, and your recommendations for equipment placement. Please format the document so it can be handed straight to my implementation and network-operations teams without further editing. Good written English is essential—clarity here saves us many ho...

Project Overview We need a skilled full-stack developer to integrate live over-the-air TV streaming and DVR recording capabilities into our existing video platform. The system will allow users to watch live channels and record shows through a web browser, with full admin control over channels, scheduling, and user access. Current Infrastructure TV Source: Standard OTA antenna (coaxial) Tuner: SiliconDust HDHomeRun Flex 4K Server: Windows Server 2025 (IIS) Website: (existing video platform) Core Requirements A. Live TV Streaming • Transcode MPEG-TS streams from HDHomeRun to HLS for browser playback • Implement or player • Support desktop and mobile browsers B. Admin Panel (Integrated into existing platform admin) • Role-based access: Super...

...telecommunications links. The goal is to move an RF signal from a remote antenna site to my baseband equipment with the lowest possible noise, excellent linearity, and rock-solid gain flatness across the target band we will finalise together during kickoff. Scope of work • Translate my high-level link budget into a full electrical-optical-electrical design, covering the laser driver, optical modulator, photodiode front-end, biasing, RF amplification, and control electronics. • Produce complete schematics, PCB stack-ups, Gerber files, and a BOM with ordering part numbers that are actually in stock. • Simulate performance (ADS, Keysight PathWave, or similar) and document noise figure, IP3, and gain plots to prove the design meets telecom-grade re...

### What this is I have three KiCad 10 boards for a telecom cabinet monitoring and access-control product. Schematic capture, part selection, footprints, placement, design rules, BOM and fabrication output are all finished. One board is fully routed. The other two have a short list of connections that two autorouters could not place, and I need an experienced layout engineer to close them by hand. This is **not** a "design my PCB" job. It is a well-defined finishing task on a board that is already DRC-clean, with every remaining connection documented and its obstacle identified. ### Current state, measured | Board | Size | Layers | DRC errors | Connections open | |---|---|---|---|---| | Base | 155 × 90 mm | 4 | 0 | 23 | | Cellular module | 80 × 85 mm...

...copper routing; several circuits and connector choices are unfinished. The product requirements have expanded to voice AI from the cloud over Wi-Fi, while character images/animations stay on the device. The A1 draft has no microphone, so that is a new circuit to design. This project is for hardware/PCB engineering; application firmware and the cloud AI service are separate work. Remote engineering is fine. We will share the review files privately. Hardware and user experience - ESP32-S3-WROOM-1-N16R8 with built-in 2.4 GHz Wi-Fi. Check antenna placement/keep-out; do not add a second Wi-Fi modem. - 4.3-inch 800 x 480 parallel RGB LCD candidate SZCLX043J-G-1000-IPS-16-X, 3.3 V logic and about 24 V / 40 mA LED backlight. Recheck the draft TPS61165 backlight circuit for this p...

Must be U.S. based. Project Title: Acoustic Drone-Detection Sensor Prototype Assembly — 5-Mic Array, Solar/LTE, IP65 Enclosure Project Overview: We need a skilled hardware prototyper to source parts, 3D print components, fabricate, wire, and assemble one complete acoustic drone-detection sensor unit from our finalized design package (parts list, wiring diagram, and mechanical layout provided). This is a build-to-spec job, not a from-scratch design job — we have a working prototype already; we need a second unit built to match it exactly (or you may be iterating on unit #2/3 for a small batch, depending on how the engagement goes). Budget: Parts budget: not to exceed $350 (reimbursed against itemized receipts — our internal reconciled BOM cost is ~$264/unit,...

...The finished design must: Securely fit and retain the Garmin T20/TT25 Mount securely to the dog collar Protect against impacts and vegetation Maintain required antenna, LED and component clearances Avoid unnecessary interference with GPS/radio operation Allow practical tracker installation/removal and required charging/service access Minimise snag points with smooth/radiused exterior surfaces Reinforce mounting areas against cracking/failure Include drainage/clean-out features where beneficial Avoid sharp edges that could contact the dog Remain compact, lightweight and suitable for repeated commercial use The designer should identify and communicate any structural, manufacturing or usability issues and propose improvements where appropriate. Garmin Geometry & Parame...

...the hardware still needs a professional touch. I need the schematic refined, a clean multilayer PCB layout produced, and a realistic parts list pulled together so I can move straight to fabrication. Here’s what remains on my side: • Polish the existing KiCad schematic—verify PoE isolation, audio amp section, mic routing, and any level-shifting. • Lay out a production-ready board that respects antenna keep-outs, differential pair lengths, and overall compactness. • Build a complete BOM with in-stock alternates and supplier links, keeping an eye on lead times. KiCad is already in the repo, but Altium Designer or Eagle are fine if you return export files I can merge back. Along with the updated source files, I’ll need Gerbers, drill data, a 3D ...

...PCB Troubleshooting Engineer – GLM Hardware Guidance & Remote Mentoring Project Description We are looking for an experienced RF/GNSS hardware engineer to help our junior embedded/PCB engineers troubleshoot a GNSS reception issue on an existing GLM hardware design. The main issue is localized around the GNSS/RF section of the PCB. The GNSS module does not achieve normal satellite reception / stable lock, while the rest of the system is working. We need an engineer who can review the RF/GNSS area and guide our team on the correct design and debugging approach. The work can be done remotely. We can provide: - schematic screenshots; - PCB layout screenshots; - selected RF section details; - measurement results; - live video from our lab; - VNA / spectrum analyzer me...

We are looking for an experienced embedded hardware engineer to design the complete electrical schematic for a low-power Smart Safety Watch in KiCad. The device is MCU-based, not Android-based. Main hardware blocks: - Nordic nRF5340 MCU - LTE Cat-1 bis modem with GNSS - Low-power accelerometer / IMU - Li-ion battery charger - Battery fuel gauge - 500–600 mAh Li-ion battery - Buck / buck-boost power regulation - Modem power switch - BLE antenna - LTE / GNSS antenna interfaces - Small display connector - SOS / control buttons - Vibration motor / buzzer - USB / charging interface - SWD programming/debug interface - ESD and protection circuits Main functions: - Step counting - Fall / jerk detection - Manual SOS - GNSS location - LTE / SMS emergency alerts - BLE mo...

I need a radar-based level measurement system purpose-built for monitoring WATER in an outdoor INDUSTRIAL site. The core requirement is accurate, non-contact liquid level tracking that remains reliable through rain, dust, vibration, and wide temperature swings. Please help me with a complete pa...Deliverables • Sensor and hardware specification with vendor links • Mechanical drawing or sketch of the installation point • Wiring / communication schematic • Step-by-step commissioning instructions • Brief O&M notes, including routine checks and troubleshooting tips Accuracy, environmental robustness, and clarity of documentation are my acceptance criteria. Feel free to suggest alternative antenna types or housings if they improve performance with...

Compact 4G GPS Tracker – PCB Hardware Design I am developing a small rechargeable GPS tracking device, initially for child tracking in schools, with the same hardware platform potentially usable for elderly people, pets, bags, bikes/scooters and other assets. Hardware Requirements Small and compact PCB; target around 25 × 25 mm, but reliability and RF performance are more important than exact size. 4G LTE cellular connectivity suitable for India. Please recommend the most suitable low-cost Cat-1/Cat-1 bis module and provide the exact MPN. GNSS/GPS for accurate location tracking. LTE + GNSS antenna design with proper RF layout. 400–500 mAh rechargeable Li-Po battery. Charging IC + battery protection. Target battery life: 3–4 days, depending on tr...

...capacitive touch pad / JST sensor headers. LAYOUT CONSTRAINTS (non-negotiable, these are why the job needs a real engineer) 1. TPS63802: inductor + input/output caps in the tightest possible loop, switch node copper minimised, solid ground return directly beneath. 2. The GPIO0 ADC divider (220k/68k) and the IPEX antenna line must be kept away from that switch node. 3. INA219 to the 0R1 shunt must be a true Kelvin/4-wire sense off the pad inner edges. 4. ESP32-C3-MINI-1U: antenna end overhangs the board edge, keepout on all layers, all 22 GND pads stitched to the pour. 5. USB D+/D- as a matched differential pair; USBLC6 within 5 mm of the connector, in series with the pair (not stubbed). 6. Touch IC within ~10 mm of its copper pad; thin, isolated trace. 7. Bo...

I ne...relay actionable alerts back to the user in real time. Here is what I expect: • Hardware design that accommodates the five radios with proper coexistence planning, power management and antenna layout. • Embedded firmware that can automatically select the best back-haul (LTE or Wi-Fi), maintain secure connections and expose a clean API or MQTT/HTTP interface for the smart-home layer. Also with bluetooth, zigbee and rf. • Deliverables including schematics, PCB files, firmware source, build instructions and a short test report confirming radio performance and end-to-end alert latency. If you have previous experience blending multiple wireless stacks on resource-constrained hardware and can move from design to working prototype, I would love to r...

I have: - A fresh install of HomeAssistant on a Raspberry Pi with a ZBT-2 antenna and some floors and rooms set up, - A Victron Easy Solar II GX, successfully connected to a Soluna 16.1kWh battery, - 1 x 1.5kW solar array connected directly to the Victron, - 2 x 1kW solar inverters, AC coupled, and - A Linux virtual machine with RustDesk that you can connect to. It has access to HomeAssistant and the Victron. What I need is: The Victron integration installing in HomeAssistant, including checking it's okay, and two actions creating: From 23:00 to 06:00 to: Charge the battery to 80%, Use grid power for home consumption. From 06:00 to 23:00 to: Prevent import from the grid by using battery power, Prevent export to the grid by charging the battery Prevent battery discharge bel...

...microcontroller with a quad-band GSM module to run stand-alone automation tasks in the field. Its core role is to read temperature, motion, and pressure sensors, make decisions locally, and trigger actuators or alarms while also pushing status updates or alerts over the GSM link (SMS, GPRS, or MQTT—whatever proves most reliable). Scope of work • Schematic capture and multilayer PCB layout, including antenna matching and power-supply conditioning for the GSM current peaks. • Firmware that handles sensor polling, on-board data processing, and a simple AT-command stack to manage the modem. I prefer clean, well-documented C/C++—an RTOS is fine if it keeps timing tight. • Complete manufacturing files: Gerbers, BOM with sourcing options, and assembly d...

Project Overview: Design and prototype a 446 MHz wireless audio broadcast system for indoor mosque sound in India (using the license-free PMR446 band). 1. Mosque Transmitter Unit: - Audio line-in from Mosque PA amplifier (Ahuja). - MAX9814 AGC leveler/compressor to prevent voice clipping or distortion. - Auto-VOX sound trigger to start transmitting automatically when the Muazzin speaks (zero manual buttons). - SA818S-U UHF module (1W Tx mode) tuned to 446.0562 MHz with 67.0 Hz CTCSS tone. - 50-ohm SMA connector connecting to outdoor Diamond X-50 minaret antenna via 15m RG-213 cable. - 5V DC power supply with surge protection. 2. Home Receiver Speaker Box: - SA818S-U module (Rx mode) tuned to the same 446.0562 MHz + 67.0 Hz CTCSS code. - Hardware squelch/mute control: MUST b...

...actionable alerts back to the user in real time. Here is what I expect: • Hardware design that accommodates the five radios with proper coexistence planning, power management and antenna layout. • Embedded firmware that can automatically select the best back-haul (LTE or Wi-Fi), maintain secure connections and expose a clean API or MQTT/HTTP interface for the smart-home layer. Also with bluetooth, zigbee and rf. • Deliverables including schematics, PCB files, firmware source, build instructions and a short test report confirming radio performance and end-to-end alert latency. If you have previous experience blending multiple wireless stacks on resource-constrained hardware and can move from design to working prototype, I would love ...

PROJECT TITLE: WEAR IT V1 – Compact Wearable PCB & Schematic Design PROJECT OVERVIEW: We are developing WEAR IT, a compact screen-free wearable health and fitness band. The functional proof-of-concept (POC) is already working. We now need an experienced PCB and electronics engineer to convert the existing engineering architecture into a professional, manufacturing-ready custom PCB. This is NOT a concept-stage project. The electronics architecture and major components have already been selected. The engineer's responsibility is to create the professional schematic, PCB layout, routing, libraries, verification and complete manufacturing documentation. MECHANICAL TARGET: Maximum PCB size: 33.5 mm × 23.0 mm Maximum complete wearable device envelope: 34.7 mm &ti...

Namaste, mujhe ek Low-Cost Wireless Audio Receiver/Box Prototype banwana hai. Main pehle ek chhota working prototype banwakar uski testing karna chahta hoon. Agar prototype sahi tarike se kaam karta hai, to aage isi design ke bahut saare units banwane hain. 1. Hamara Basic Concept Hum ek aisa chhota aur kam lagat wala wireless receiver box/module banana chahte hain, jo ek main transmitter/master unit se wireless audio signal receive kare aur us signal ko speaker/amplifier tak pahunchaye. Hamara uddeshya hai ki gharon, dukaanon aur anya locations par lage chhote speaker boxes ko har jagah alag se internet/Wi-Fi se connect karne ki zarurat na pade. Main system kuch is tarah rahega: Main/Master Unit → Wireless Signal → Receiver Box → Amplifier/Speaker Isi concept p...

I need an ANSYS HFSS 2025 R1 project that faithfully reproduces the substrate integrated waveguide (SIW) Ka-band leaky-wave antenna reported in the attached IEEE paper. Every physical detail—overall footprint, substrate stack-up, USRR/slot pattern, via diameter and pitch, 50 Ω microstrip feed with wave port, ground plane, and the boundary conditions described by the authors—must be copied exactly. The paper supplies clear drawings and tables, so you can read dimensions directly without guessing. After building the model, set up a frequency sweep from 30 GHz to 37 GHz. I will accept the design when the simulated S11 stays below −10 dB from 30.8 GHz to 35.9 GHz, matching the curve published in the article. Deliverable • A single, fully resolved .a...

ESP32 Sonar Data Streaming to Android Phone – 300–400m Direct Wi-Fi Link, No Repeater I am looking for an experienced embedded/RF developer to build a reliable wireless communication system for a fishing boat sonar. CURRENT SETUP On the boat: - Sonar - Existing sonar driver - ESP32 On shore: - Android phone WHAT I NEED I want the following architecture: DRIVER → ESP32 → Wi-Fi AP + external antenna → 300–400m → Android phone → APK The Android phone must connect DIRECTLY to the boat. STRICT REQUIREMENTS - 350–450 meters real-world range - Direct boat → phone connection - NO repeater - NO router/access point on shore - NO additional radio receiver on shore - NO internet connection required - Android phone must receive the ...

...schematic to incorporate the new components and add missing features (USB, GPS, Modbus, battery socket, RTC). • Lay out a multilayer PCB that respects creepage/clearance for 240 V AC, relay spacing, and antenna keep-outs. • Generate manufacturing files (Gerbers, pick-and-place, assembly drawings) and a clean BOM with alternates. • Deliver ready-to-flash test firmware that confirms power-up, relay switching, current sensing, cellular registration, Wi-Fi/Ethernet link, GPS lock, and Modbus transaction—all via USB for easy validation. Acceptance I consider the job complete when the design passes a 3-D DRC check in Altium (or KiCad) and an Australian compliance review for the mains section, and when your demo firmware reports stable readings on al...

...low-loss feed to the antenna structure. Scope • Translate my existing schematic (KiCad format) into a production-ready multilayer layout. • Model and route all RF paths with controlled impedance, proper stack-up definition, and tight clearance to meet high-frequency performance targets. • Design and tune the on-board antenna geometry, matching network, and keep-out regions inside KiCad’s PCB editor and 3D viewer. • Run DRC, ERC, and any KiCad integrated RF simulation tools you prefer, then iterate with me until we meet the S-parameters I will supply. Deliverables • KiCad project folder: schematic, PCB file, custom footprints, and 3D models • Gerber, drill, and assembly files ready for fabrication • A brief lay...

We are seeking an experienced PCB designer to cr...for single-cell Li-Ion battery operation - Input protection circuitry (over-voltage, over-current, reverse polarity) - Dual antenna connectivity (SMA and connectors) The board must be production-ready, reliable in field conditions, and designed per industry standards. Deliverables include schematic, PCB layout files, BOM, and Gerber outputs. The designer can use KiCad or EasyEDA as the design tool. Full schematics, pin allocations, firmware interface details, and application context will be shared post-NDA. Ideal Skills and Experience: - Expertise in high-precision GNSS ICs (e.g., u-blox ZED-F9P) - Proficiency with ESP32-series modules and embedded hardware design - Experience with battery-powered devices and power...

Job Description We are looking for an experienced hardware/embedded engineer for an upcoming wearable product development project. The product is a compact wrist-worn connected device, and we need someone who has previously taken a wearable or similar battery-powered consumer electronics product from hardware design through prototyping and manufacturing. The device will involve: - Custom PCB / electronics design - Bluetooth Low Energy (BLE) - Microphone + speaker / two-way audio - Low-power embedded firmware - Battery and power optimisation - Wireless charging - Compact wearable enclosure / CAD - Prototype development and testing - DFM and manufacturing handoff The final project will require complete production-ready deliverables including schematics, PCB/Gerber files, BOM, f...

We are looking for an experienced RF PCB Layout Engineer to review and complete an existing multi-radio PCB design. This is not a design-from-scratch project. The schematic, component placement and most signal/power routing are already completed. The remaining work is focused mainly on RF layout finalization and production-readiness review. Required experience: Sub-GHz / LoRa RF PCB routing LTE RF layout GNSS RF layout 50-ohm controlled-impedance routing RF matching networks antenna feed layout ground return and stitching-via strategy RF keep-outs and isolation multilayer PCB stack-up EMI/EMC-aware layout KiCad The selected engineer will be required to review the existing PCB, complete/correct the RF sections and bring the board to fabrication-ready status. Expec...

...unit must be an ESP32-C3 and the only wireless link I need is Wi-Fi—no Bluetooth fallback. Power will come from a small, replaceable battery rather than USB or a rechargeable cell, so every milliamp you can save counts. Here is what I expect when we are done: • A compact PCB layout that fits the rough footprint of correction tape (around 95 × 25 × 15 mm; I can adjust a little if it helps with antenna clearance). • Complete schematic, Gerbers and a concise BOM with readily available parts. • Firmware built with ESP-IDF or Arduino-ESP32 that can send and receive short text payloads over Wi-Fi, display them (even a simple OLED/LED matrix is fine), and confirm delivery. • Low-power strategy outlined and demonstrated so the device can idle...

Project Overview I am looking for an experienced Embedded Systems / PCB Design Engineer to review, validate, and complete an ESP32-based Ethernet gateway project. The project is based on an ESP32-WROOM-32 module and LAN8720A Ethernet PHY and is intended to operate as an ESP-NOW to wired Ethernet/MQTT gateway. I will provide an existing project repository containing the current KiCad schematic, PCB layout, firmware, BOM, Gerber files, 3D models, and documentation. The goal is to have a professionally reviewed and production-ready design, with the firmware properly configured and tested. Existing Hardware The current design includes, among other components: * ESP32-WROOM-32 * LAN8720A Ethernet PHY * CH340C USB-to-UART interface * USB input * 3.3 V power regulation...

I am looking for an electronics engineer to design a small battery-powered IoT sensor PCB based on the ESP32-C3. The goal is to create a compact prototype PCB capable of monitoring environmental conditions and communicating wirelessly through Wi-Fi/Bluetooth. Main Requirements: The PCB should include the following: * ESP32-C3 module * BME280 temperature, humidity and pressure sensor * Ambient light sensor * Sound sensor/microphone input * 0.96" I2C OLED display * Li-ion battery connector * Li-ion battery charging circuit * USB-C connector for charging and power * 3.3 V voltage regulation * Power ON/OFF switch * User push button * Status LED * GPIO expansion header * Required protection and decoupling components Power The board will be powered by a single-cell Li-ion battery....

PCB Design & Engineering for HydroNest RO Plant Controller 1. Project Objective We are developing a professional controller PCB for commercial/light-commercial RO water treatment plants under HydroNest India. The objective is to take our existing functional requirements, selected components/modules and control logic, and have an experienced electronics engineer design, optimize and finalize the complete electronic controller. We are not looking only for PCB layout work. The engineer should be capable of taking the requirements at a system level and developing the complete electrical design, schematic, component selection/optimization and production-ready PCB. ⸻ 2. What We Will Provide We will provide: * RO plant operating requirements and sequence * List of...

I'm looking for a skilled designer to create a minimalist, waterproof enclosure. The enclosure will house a solar panel on the top side and some antennas on the bottom side. Key requirements: - Minimalist design approach - Waterproof functionality - Securely house solar panel and antennas - Material: Plastic Ideal skills and experience: - Experience in designing waterproof enclosures - Strong understanding of minimalist design principles - Proficiency in working with plastic materials - Background in solar panel and antenna housing solutions Please provide samples of previous similar work.

Freelancer.com Project Title Custom Wall-Mount Enclosure Design for Arduino UNO Q 4GB I am looking for an experienced mechanical/CAD designer to create a production-ready custom electronics enclosure for a commercial monitoring product called the PeafowlPro Hub. The initial Hub will be built around an Arduino UNO Q 4GB and will not include a display or additional internal expansion boards. The goal is a compact, clean, professional enclosure suitable initially for FDM 3D printing, while keeping the design practical for future manufacturing. Design Requirements The enclosure should be a white, two-piece design consisting of a front/top cover and rear/base housing. A snap-fit assembly is preferred, although the designer may recommend a better serviceable fast...

# NFC Design Requirements ## 1. Basic Requirements * **NFC Frequency:** 13.56 MHz * **NFC IC Supply:** 3.3 V * **NFC IC:** NXP NFC IC * **Host MCU:** ESP32 / selected MCU * **Communication:** I²C * **Antenna:** PCB loop antenna * **Target NFC Range:** 20–30 mm * **PCB:** 2-layer PCB preferred * **Operating Temperature:** -20°C to +70°C ## 2. NFC Antenna * PCB antenna shall be designed for **13.56 MHz**. * Antenna dimensions shall be optimized based on available PCB space. * Keep ground copper away from the antenna area. * Keep battery and other metal objects away from the antenna where possible. * Antenna matching components shall be provided for tuning. ## 3. Power * NFC IC supply: **3.3 V** * Provide ...