Transistoremplois

Bonjour, Je cherche actuellement à obtenir une horloge qui allume un système d'envoi de données quelques secondes toutes les 4 heures puis tombe en veille profonde (deep sleep). Basé si possible un atmega328p ...toutes les 4 heures puis tombe en veille profonde (deep sleep). Basé si possible un atmega328p ou plus petit mais facilement programmable. Je fourni déjà une parti du code si besoin. Sinon il est tout a fait possible de repartir de zéro. Le schéma joint explique le montage global et le code fonctionne déjà cependant, de manière aléatoire, arrive un moment ou l'horloge reste allumé et ferme le transistor qui fait vider les batteries qui utilise le capteur et l'...

Bonjour J'ai besoin d'aide pour résoudre quelques questions en électronique analogique Transistor bipolaire. ....

Bonjour J'ai besoin d'aide pour résoudre quelques questions en électronique analogique Transistor bipolaire. ....

...Pi with a keen understanding of its intricacies, specifically someone with experience dealing with its diverse components such as LEDs, buzzer, and magnetic door locks. The only thing I can think of that might’ve changed is that we got this project shipped from my home country. It was working fine but when it arrived here it’s not anymore. There might be an issue with the power supply or the transistor or maybe the relay. Key tasks include, but not limited to: - Troubleshooting the issue; Why did they stop working? - Repairing or suggesting suitable replacements if necessary The issue is most probably something small as the software and code are running fine but I can’t figure it out and need someone to fix it An error-free operation is what I'm aiming...

...project, please look at PDF description: The mechanical system that needs to be developed consists of 3 different main parts: - a DC motor (3V7) with gearbox, - a short plastic piece X connected to motor shaft (rotating RED COLOR) - a long plastic piece Y connected to X and use grease and mounted on external shaft (indicated by PINK COLOR) A printed circuit board will be equipped with the correct transistor drivers while the motor signals (pulsating or not) will be generated by a microcontroller The intention of this design is that 2 identical pieces of Y (call Y1 and Y2 for reference purpose) can move synchronously together (exactly same movement) or individually (opposite of each other lets say or one moving and the other one stand still) and this with just 1 single motor drive...

...voltage transistor microcircuit. The primary function of this microcircuit is switching between two circuits, not to amplify signals. We need to present a 5.1K GND to one of two GPIO pins on an MCU depending on the state of sensor output that throws a 5V high/low output on one single line Key Project Details: - The circuit should be designed to operate at low power levels to minimize power dissipation. - The preferred material for the transistor is Silicon. Ideal Skills and Experience: - Electronics engineering - Transistor theory - Circuit design and analysis - Experience working with silicon transistors and low voltage systems Your bid will be more competitive if you can provide examples of prior experience designing and building similar silicon-based low ...

We are seeking a freelancer with expertise in the Finite Element Method (FEM) and semiconductor physics to assist with solving a set of semiconductor transport equations for a MOS-transistor simulation, provided in German. The project entails discretizing the Poisson equation and the continuity equations for electron and hole charge carriers, applying appropriate boundary conditions, and solving the resulting nonlinear system of equations. Objectives: Discretization of Equations: Employ FEM to discretize the Poisson equation and the electron and hole continuity equations for a 2D MOS-transistor model, as described in a German-language exercise sheet. Boundary Conditions: Implement Dirichlet and Neumann boundary conditions in alignment with the semiconductor device geometry ...

Glade Layout IC Design Transistor

I'm looking someone to help me to design/capture a schematic based on Small Led PWM Driver(must include a power supply, transistor driver for the LED, MCU and UART Interface). Must be done for KiCad V5 or V7. I will provide you the circuit guideline, schematic components and footprints. Please only bid if you have previously experience with KiCad. Include the text "kicad mciau" in your proposal description. Regards

hello, as we discussed in the messages area, i need help to check if the transistor D882 can be powered by 5V (from usb) and if a modification in the circuit (resistor connected to the transistor ?) is necessary, and if the transistor will not heat too much. and otherwise suggest another transistor so that i can power the circuit with 5V. thanks,

...on the lookout for a skilled and experienced circuit designer who can create a pulse charging circuit for a 12V or 24V battery. This circuit will need to be compatible with a 500watt, 44V, 12 A max solar panel. Ideally, you should be proficient in: - Designing circuits with a Pulse Width Modulation (PWM) generator - Building circuits that trigger a Mosfet, IGBT, BJT, or an equally efficient transistor - Engineering circuits with a charging voltage exceeding 100V - Regulating frequencies in the range of 0-10kHz. - Efficiency is crucial here. Don't want too much wasted energy in heat or heat dissipation, or waste half of the energy if it is 50% duty cycle. This is an opportunity to demonstrate your in-depth knowledge in electronics and circuit design. A robust understanding ...

...am looking at using the Nichia NUBM44 but open to other suggestions. Will obviously also use a heatsink +fan for cooling. The circuit should consist of three inputs, +VCC, GND and the PWM signal. pick your own values for source voltage and input signal but try to stick to standard numbers. I basically just need the diode to be controlled by the PWM signal, that's not hard to do with an NPN transistor and a current limiting resistor. Though I would also like something to make sure there is a constant stable current being fed to the diode, this is all about making sure the diode won't be damaged. Include the fan as a component if you can. So for example when the diode is on the fan MUST be on at the same time and maybe also have a cool down period so when the diode tur...

RF pre-amplifier simulation (experienced RF engineers only please!) I am looking for a freelancer who can design and simulate with SPICE an RF pre-amplifier with 22 dB gain. The specific frequency range I am targeting is from 300 KHz to 500 MHz. Skills and experience required: - Able to show they can simulate a simple 1 transistor amplifier in SPICE (pre-selection test) - Proficiency in RF circuit design and simulation - Experience with high gain RF pre-amplifiers - Knowledge of impedance matching techniques - Familiarity with simulation software such as SPICE, ADS or CST - Ability to analyze and optimize amplifier performance If you have experience in RF circuit design and simulation and can meet the specific requirements of this project, please submit your proposal.

Codium is a French company comprising an electronics design office (which designs electronic boards for customers) and an electronic board production unit. We assemble our customers' boards. Our current logo (attached) is cold and difficult for our custo...boards. Our current logo (attached) is cold and difficult for our customers to understand, and not very stylish, despite the fact that our company is young and dynamic. We want to give it a facelift. We want to use the same base, the same identity, but give it a young, dynamic and warmer touch. The brackets in the current logo refer to computer code, and the symbol corresponds to that of a transistor, the basis of all electronic circuits. The logo can be redesigned with a curved line or other technique, while retaining...

Dear Dave W As a seasoned electronics engineer with expertise in designing and implementing transistor circuits, I am excited to offer my services in developing a simple circuit that can be used to light an LED with a 1.3V base voltage and a 9V collector-emitter voltage. I am confident that I can design a circuit that meets your specific needs and requirements. I will work closely with you to understand your application and ensure that the circuit is safe and reliable.

Smallest circular footprint possible, suitable track thickness for 12v, include locations of components including resistor specifics. Components Rechargeable 12v (or 6v x2 in interest of reducing footprint). 3.7g micro servo x2 3.7v dc motor x2 Esp32 cam 1.3 inch color screen 3 microphones Distance sensor Motion sensor Photo Transistor Usb c port for charging and data upload with respective voltage/ charge protection.

Smallest circular footprint possible, suitable track thickness for 12v, include locations of components including resistor specifics. Components Rechargeable 12v (or 6v x2 in interest of reducing footprint). 3.7g micro servo x2 3.7v dc motor x2 Esp32 cam 1.3 inch color screen 3 microphones Distance sensor Motion sensor Photo Transistor Usb c port for charging and data upload with respective voltage/ charge protection.

I am looking for a skilled freelancer who can assist me with double-checking a small and simple PCB and its components. The project involves verifying the functionality and accuracy of the PCB and ensuring that all standard components are correctly installed. The board has the function to interface with a Raspberry Pi to: Drive 4x 12V pump through transistor Drive 4x LED (various status and indicators) Drive 4x Sensors Skills and Experience: - Experience in PCB design and verification - Proficiency in verifying the functionality of standard components - Attention to detail to identify any potential issues or errors - Knowledge of best practices in PCB verification and testing The ideal freelancer should have a strong background in PCB design and verification, with a focus on sm...

I am looking for an experienced PCB designer to check and improve a small-sized PCB (less than 10cm x 10cm). The main function of the PCB is to a control system a set (4) of pumps and receive input signals. It has worked flawlessly previously in the past. It appears a transistor on the PCB was burned out. I've wired up a new PCB with more stronger transistors and now the entire PCB is malfunctioning and I need help. Design files will be provided once a freelancer has been chosen. If you have the necessary skills and expertise in PCB design, and are able to work on a small-sized PCB for a control system, please submit your proposal.

Develop logical equations based on given specifications. Design gate-level schematics to meet all specifications. Utilize CMOS logic to create transistor-level schematics for all logic gates. Calculate W/L ratios for each MOSFET based on transient performance. Determine mid-point voltage, rise time, and fall time for each unique logic gate. Calculate capacitances considering parasitic capacitance values. Prepare a floorplan for layout, considering gate locations, signal distribution, and pad locations.

Develop logical equations based on given specifications. Design gate-level schematics to meet all specifications. Utilize CMOS logic to create transistor-level schematics for all logic gates. Calculate W/L ratios for each MOSFET based on transient performance. Determine mid-point voltage, rise time, and fall time for each unique logic gate. Calculate capacitances considering parasitic capacitance values. Prepare a floorplan for layout, considering gate locations, signal distribution, and pad locations.

Input 12V I want to connect 3 devices to arduino as below D2 -> DEV1 which requires 1.21V, 0.1A D3 -> DEV2 which requires 1.48V, 0.1A D4 -> DEV3 which requires 1.48V, 0.1A Can you give me transistor circuits with resistor values.

Preciso de ajuda para fazer um projeto utilizando Arduino. Basicamente tenho leds de uma pisca pisca de cascata que gostaria de reaproveitar. São proximamente 8 linhas de 72 LEDs que estão ligados em serie (gostaria de controlar pelo Arduino pel...utilizando Arduino. Basicamente tenho leds de uma pisca pisca de cascata que gostaria de reaproveitar. São proximamente 8 linhas de 72 LEDs que estão ligados em serie (gostaria de controlar pelo Arduino pelo menos em 4 grupos). A energia na minha região é 220 volts. O O Código do Arduino eu mesmo posso fazer, preciso de ajuda para saber quais componentes eletrônicos preciso usar por exemplo, Qual transistor devo usar? Ponte retificadora? Capacitor? E qual a potencial ou referencia de c...

I'm developing a gateway station that receives da...route goes to a LDO-3.3V. I don't want to use the module () anymore and embed it to the PCB as a fixed-5V circuit. So i Ask for: 1. Add a transistor circuit to supply 5V to the modem (from the lm2596 regulator) when the ESP32's GPIO commands. Add it to the current version of the schematic and PCB board layout. 2. Do the fixed-5V circuit, according to LM2596 datasheet, in the current schematic and PCB layout. Find the main components (1. transistor; 2. coil, diode, chip regulator) in LCSSC Electronics () so the footprints of the PCB match the solder pins of the packages. Add it to the current version of the PCB board layout.

I am looking for someone to design a power amplifier for a home audio system. The desired power output is 100 watts, and the preferred technology for the amplifier is Transistor-based. The amplifier should provide an optimal sound quality for an enhanced listening experience. The end product should be stable, durable, and reliable for long term use. The technical and creative skills of the freelancer should align with this project's needs.

I am looking for an experienced freelancer to assist with an assignment on transistors of electronic. This project should focus on transistor circuits and applications and have a theoretical approach. I require a high-level overview of the content in the assignment with key details as needed to demonstrate knowledge and understanding of the topics. Any references used must be correctly cited.

I am looking for an experienced engineer who can create an Agilent Advanced Design System model of an avalanche transistor pulse generator. I am teaching my students about effects such as reflections from impedance discontinuities, propagation time, dispersion etc through a combination of experimental work and modelling. To support the course I am creating, I would like to have a transient model of Jim Williams' famous avalanche transistor-based pulse generator that was published in Analog Device's application note AN47. I am NOT after a simple pSpice/LTspice model - these are trivial to make using spice models of transistors available for download. I need a model that incorporates real transmission line/geometric effects and can fuse electromagnetic models with...

I am looking for a skilled Analog Electrical engineer to modify a linear amplifier using op-amp and BJT transistor technology. The amplifier should have a low gain of less than 10 and a low output impedance of less than 100 ohms. Additionally, the preferred power supply voltage is 24V. The ideal candidate should have experience in designing linear amplifiers and be familiar with op-amp and BJT transistor technology. A strong background in analog circuit design and analysis(LTSpice or PSpice) is also preferred.

Possession of STM development Board with Cloud Ethernet connectivity is a Must Extensive Knowledge of all STM development tools is a MUST NUCLEO-F303ZE Must have in possession so that we can work on the same identical proto board to speed up development and testing We need a simple 16 port HI/LOW GPIO isolated transistor output (simple ON/OFF) but it has to be from remote Cloud service and it must have option to also have local Network/Intranet locked connectivity We also need ADC data from as many as 8 input ports, this data will be sent to the cloud for processing and needs to be visible locally stored temporarily for up to 120 hours internally and also sent to the Cloud Simple GUI will suffice for testing, API will need to be created and well documented We are not look...

[REVISADO] Estoy buscando un especialista en gestión de redes sociales y redacción SEO para manejar varias cuentas en diversas redes sociales. Los canales con los que trabajaremos incluyen YouTube, Instagram, TikTok y Transistor. Objetivos: Aumentar la visibilidad de las publicaciones en las redes sociales y mejorar el posicionamiento orgánico dentro de cada canal. Programar contenido en horarios estratégicos para maximizar la interacción y el alcance del mensaje. Combinar redacción SEO y programación estratégica para aumentar la presencia, alcance y relevancia de la marca en las redes sociales. Responsabilidades: Redacción de textos persuasivos y efectivos que acompañen las publicaciones. Programación y...

We are looking for someone with experience in building transformer base 3 phase inverter. We are having issues where mosfets are burning. We built a buffer board using CD4011 ic to split the driver signal into 6 channels which is 3 for the high side and 3 for the low side. Then we built a transistor board and an optocoupler board that is used to feed the signal to the driver board which was designed using IR2110 ICs. This driver board is what should drive the emulator board (the mosfets) which receives the battery input and then drives the transformer. Currently the mosfets keeps getting hot and burning

I'm looking for a freelancer to create high-quality written guides on the fundamentals of electronics. The ideal candidate for t...high-quality written guides on the fundamentals of electronics. The ideal candidate for this project will have a background in engineering or a related field, with experience in electrical and/or electronics systems. The successful freelancer must create thorough, well-written written guides that include key concepts and topics such as digital circuits, AC-DC power supplies, microprocessors, transistor logic, amplifiers, audio circuits, and RF also need help with digital logic circuit , example: Determine the binary values for which the following standard SOP expression is equal to 1 Convert each of the following Boolean expressions to SOP form ...

The motor speed can be controlled manually by the user using a potentiometer at a specific temperature; if the user does not give any particular rate, the motor speed is controlled based on the temperature. 2. A temperature sensor will be used to detect the temperature. 3. Pulse Width Modulator and 555 timers will control the speed of the motor...will be used to detect the temperature. 3. Pulse Width Modulator and 555 timers will control the speed of the motor. 4. The direction of the motor changes when the temperature rises above the value given by the user, which will let airflow in the opposite direction. 5. The Motor direction is reversed using an H-bridge. 6. Additional components required are wires, switches, a potentiometer, a transistor, a resistor, a breadboard, and a DC po...

...v=-LVxHFUtZHQ) In carry look ahead adders, the carry propagation time is much less than RCA (ripple carry adder). Therefore, the addition process is very fast. As you get more familiar with CLA concept you will understand why we need it for faster adder hardware. Study the ripple carry adder first to appreciate the objectives. You may use transmission gates, static or dynamic CMOS design. 1) Draw a transistor level schematic of the 4-bit CLA in Electric and simulate it in LTSpice. 2) Draw stick diagrams and Euler’s paths where appropriate to design. 3) Perform the Electric Layout with IRSIM. 4) Verify your design by adding the following numbers in signed 2’s complement. All numbers are represented in decimal numbers in the following.: (A) -6+3=-3, (B) -5-1= -6 and (C)...

In recent technologies of Electronics applications, Adder is an important source of ...next addition. But the area consumption is more, in which the performance of the adders will decrease for higher order bits’ addition. This paper is to design an area efficient Kogge Stone PPA which performs the parallel arithmetic operations in CMOS applications and analysed the design based on the parameters like area and power individually. The proposed area efficient KSA design used the Pass Transistor Logic (PTL) and analysed the performance of particular design. The Performance results of PTL with PP-KSA design used the reduce number of MOS devices which yields less area consumption compared to basic design of 4-bit PP-KSA. Entire analysis results of these designs can be done in Microw...

i have 60 12v motors (they have own board with some protection) , which i try to control from arduino im doing now with a 679 darlington transistor but there are lot of cables, i try to make things simple and i need to design a pcb like this in image (atachment) i want to add there RJ 45 port and add motor wires to it for simple connection. i need to do it via any cheap online platform like JLPCB or similar

I want to modify my TIP122 switching circuit for high speed operation. Attached old circuit.

Electronic skin (e-skin) is an artificial skin that mimics the sensing capabilities of human skin, which brings many potential applications in robotics, artificial intelligence, prosthetics, and health monitoring technologies. Many attempts associated with various mechanisms/approaches and materials...e-skins. Significant progress has been made in recently years. This paper firstly reviews the most recent progress on nanomaterial- based e-skins according to four major sensing mechanisms, with an emphasis on the effects of various materials on the sensitivity and stretchability of e-skins. Then the paper updates the progress and effort with respect to multifunctional e-skins and organic-thin-film-transistor based large-area e-skins. Further development possibilities are also briefly ...

My son requires a schematic to follow for building a working example of switching a positive output to a 100w 12v bulb using a MOSFET or transistor with a 12v trigger. ( NOT from a board like Arduino. )

...mostly working 2) Monitor a thermo module for overheating, if overheating, stop motor - mostly working 3) SD card module to store data - not implemented 4) MPU6050 to monitor linear movement in one dimension (Y) and use it for automatic start in case of shaking, or stall guard, in case linear motion is blocked, switch of motor - partially working - with bugs 5) 2 fan motors for cooling driven by transistor coupled to a step down/up converter for voltage smoothing and noise reduction. 6) UI via webserver, mostly working for basic and advanced control, OTA firmware update iffy, the file upload dialogue does not pop up in Android 11 and 12. Bug we have: 1) The MPU6050 is only recognized by our ESP32 if the ESP32 runs at 240Mhz, not otherwise. We'd prefer to run the ESP32 at 8...

Transistor keeps failing on circuit board for small refrigerator. Need help selecting upgraded transistor or other option? Detailed pictures of board, no schematics.

Hi Matt, I need someone to sit down with me to verify my pcb drawing. How much current will go through the resistor, how sharp will the transistor open/close. A component validation. Do you have software to simulate pcb operation? Is this something you would be interested in? Regards Nick

Hi David, I need someone to sit down with me to verify my pcb drawing. How much current will go through the resistor, how sharp will the transistor open/close. A component validation. Do you have software to simulate pcb operation? Is this something you would be interested in? Regards Nick

Hi Thomas, I need someone who can put my pcb drawing in a software simulator to check each component on my pcb. How does the transistor open? How sharp? How much current on the resistor etc etc. its a simple pcb so should be reasonably quickly. Is this something you can do? Nick

Precisa ser feito usando ESP32 e ESPRESSIF IDF Requisitos: Controle e driver para bomba de água (Transistor + Rele); Sensor nível de água em reservatório (célula de carga HX711); Sensor de temperatura água (DS18B20); Válvulas solenoides (Rele). App de monitoramento e controle on-line: Monitoramento do estado da bomba de água e das válvulas solenóides, nível do reservatório e fluxo de água; Gera alarmes e enviar pelo Telegram quando estiverem fora do range ideal de funcionamento; Controle de acionamento remoto da bomba de água e das válvulas solenóides.

Hi Julian I saw your profile and was wondering if you can help me with my project. I have drawn an electronic circuit and I need it validated. So I would give you my drawing, it is not very complicated, and you put it in your simulation software. Then you would run a simulated on off and tell me how each component will behave, for example, how quick will transistor 2 open, etc I think after my circuit is in the simulation software its probably a quick job Is that something you can do? Nick

I need to simulate a project involving a thin film transistor using Zinc oxide as semiconductor material with varying channel length of source and drain electrode and Aluminium oxide as dieletric layer. This simulation should be done using TCAD atlas silvaco. I have the file here. I couldn't derive the ID vs VG waveform with larger current. It would be great if u helped me to simulate this project. I need this project by Friday this week (8 July 2022)

Need a 2d animation explanatory video showing how transistors works, their general components and applications. No script available. Should be done by experienced freelancer only.

I am using split rail supply using attached circuit. Total current draw is nearly 100ma at 24v input. Current situation is PNP transistor getting hot. So if current will increase it can cause the issue. What cout be the solution to improve the situation.

Need an electron...an electronic project, only schematics, in Kicad. The board must have a STM32F072 as mcu. Then here is the list of requirements: -power supply at 24Vdc; -external resonator for maximum frequency; -external 32768khz quartz for rtcc; -button battery for backup rtcc; -4 open collector output max 6 amps of current; -HD44780 display with contrast managed by pwm pin and backlight managed by an npn transistor controlled by mcu; -HC06 Bluetooth module; -external i2c eeprom; -6x inputs for buttons (buttons between input and GND); -to be programmed and debugged with StlinkV2 (jtag); All others features can be decided from freelancer. Need a functional project to be installed in industrial environment. I’m a software developer and I haven’t time for schemati...