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Solar LiPo Charger board

Wanted is design, schematics, PCB layout and working prototype of a solar LiPO charger board.

Documentation of all used parts as well as schematics and layout has to be delivered along the gerber files, a BOM list and a working prototype.

The specs are as follows:

Minimum requirements:

- 1V .. 3V input from a photovoltaic cell

- charging of a single cell LiPO battery 150mAh .. 500mAh capacity

- battery charging state can be obtained

- battery fuel gauge information can be obtained

- battery overcharging protection

- battery disconnect function for battery protection at low voltage level

- ultra low quiescient power consumption

- stable 3.3V output from Vin or battery (automatic source selection)

- cutoff of output to protect battery and wait for recharged battery

- automatic power output as soon as battery is recharged to certain level

- additional 5V micro USB charging input

Optional requirements

- wider input range (max 0.5V .. 5V)

- wider charging range (max 100mAh .. 1000mAh capacity)

- MPPT charging is an absolute plus (i.e. SVP1050, BQ25570 or similar)

- BOM sum <15 USD at 1K

- minimal space requirements

- ideally designed as breakout board for ESP8266 (WeMOS D1 mini) or ESP32 (ESP32 D1 mini) board

Compétences : Electronique, Design de circuits, Design de produits, Mise en Page PCB, Microcontrôleur

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Concernant l'employeur :
( 3 commentaires ) Bremen, Germany

Nº du projet : #20407149

Décerné à:


Hello, SPV1050 is very expensive, and it doesn't provide extra Vin inputs, besides it has a limited charging capability (75mA). On the other hand, BQ25570 is expensive too. There are cheapers IC that can do the same. Plus

%selectedBids___i_sum_sub_7% %project_currencyDetails_sign_sub_8% EUR en 10 jours
(8 Commentaires)

20 freelance font une offre moyenne de €353 pour ce travail


Hello, We are a Turkey based company and we offer product design & development, electronic schematic & PCB design, plastic injection molding and mass production services to our customers. We can help you to design and Plus

%bids___i_sum_sub_35% %project_currencyDetails_sign_sub_36% EUR en 20 jours
(68 Commentaires)

Dear Sir. How do you do? I have seen your description very carefully and posting to you my idea. you can see my many work history from my profile. I have ever done solar battery charger system. So once you hire me, i c Plus

%bids___i_sum_sub_35% %project_currencyDetails_sign_sub_36% EUR en 7 jours
(34 Commentaires)

Hello, Hope You are doing great. Let's get You some brief details about us. We are innovative product design and development company, specializing in designing products for industrial and mechanical industries. We w Plus

%bids___i_sum_sub_35% %project_currencyDetails_sign_sub_36% EUR en 35 jours
(9 Commentaires)

Hello Thanks to support this It,s pleasure to prefer recommendation for my job first. So the important thing what i want to show you is i have deep and flexible experiences within electronics system design and develop Plus

%bids___i_sum_sub_35% %project_currencyDetails_sign_sub_36% EUR en 7 jours
(1 Évaluation)

i have more than 6 years experience in embedded system with PCB design with eagle and altium design software and i have already made a esp32 with battery charging circuit . so i can do your job within a time limit with Plus

%bids___i_sum_sub_35% %project_currencyDetails_sign_sub_36% EUR en 10 jours
(6 Commentaires)

Hi there, We can design a schematics, PCB layout and working prototype of a solar LiPO charger board as per the given requirements. We will also deliver you the gerber file and BOM. We are a professional team in Emb Plus

%bids___i_sum_sub_35% %project_currencyDetails_sign_sub_36% EUR en 30 jours
(4 Commentaires)

Guten Tag! I have several ready-made solutions that can be prototypes for solving your problem. First, I have a few of my own designs of controllers for solar power plants. Secondly, I have several ready-made low-volt Plus

%bids___i_sum_sub_35% %project_currencyDetails_sign_sub_36% EUR en 12 jours
(7 Commentaires)

Hello, i can design this board and smt then send to you. please chat with me. i am from shenzhen china. i have my own lab.

%bids___i_sum_sub_35% %project_currencyDetails_sign_sub_36% EUR en 7 jours
(5 Commentaires)

Hello, I already have all electronic parts ... so I will give you one tested solution which will develop for you around your requirements. Will be more milestones and after each milestone you will release the current a Plus

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(1 Évaluation)

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(1 Évaluation)

I currently have similar schematic meet your requirements (that use TI DPM charger). I need to modify them to work the best for your case. I am a professional PCB designer and embedded control engineer who always looki Plus

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Hi there! This is Javier Alcina. An experienced electronics engineer with more than 15 years designing electronics attending to ultra low power consumption. I can make a design for you according all your specs (requ Plus

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Hi, We are a professional Manufacturing service that has extensive experience in CNC machining, 3D Printing, Injection Molding, Laser Cutting. We work with all materials and to all finishes including prototyping & Plus

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I am having 28+ years of rich R&D experience in Analog design, Embedded Hardware systems, FPGA based systems, Circuit design, Validation, Microprocessor/ Microcontroller based design Analog & Digital hardware design, L Plus

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Hi! Hope this finds you well. I’m confident that I can complete this project for you because I have worked on a similar project when I was an intern at IRNAS. If you are interested I can send you the link. I could fi Plus

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