Design me a Product

Solar Rechargeable Small Hobby Motor Controller

I need a simple electronic project designed and source of parts identified the project description is as follows:

Overall Description: Small DC electric motor with included small gearbox designed to maximize torque powered by 4-rechargeable AA batteries that recharge via a small hobby size waterproof solar panel.

Function: The DC motor will run until the batteries are depleted then stop. The solar panel will automatically start recharging the batteries, and when they have reached a full charge a signal will be sent to activate the motor again which will run again until the batteries are depleted. If left in the sun the system will run automatically unattended cycling between running and recharging until the rechargeable batteries can no longer take a new charge.


The DC motor/gearbox can be obtained for less than $10/unit on Ebay and many other sources, 3-6 volts, 0.5kg-2kg/cm torque.

On a hobby bread board mount or similar platform the whole project size should be no more than 150mm x 100mm for the electronics with an approximately 150mm x 100mm solar panel

It’s no problem getting a DC motor to run on a bank of batteries. It’s no problem buying and using a small solar panel to charge batteries.

The core of this project is the controller that lets the motor run the batteries down then keeps the motor off until the batteries have fully re-charged, then releases the motor to run when they are recharged.

Budget: If each part is bought one by one (no volume discounts) the total cost for everything needed to make one of these projects must be less than $30 US, not including the batteries, parts shipping fees or taxes. Estimate: The motor/gearbox is $10, breadboard $5, solar panel $5, so I am assuming controller parts or $10.

Milestone 1: Come up with a prototype parts list but hold back the parts specifications and links and I will release $80 for parts and shipping. Although the final project should cost $30/per unit for parts I assume that the prototype will take additional parts as the developer experiments to get it working, so an additional $50 for more parts has been added to milestone one.

Milestone 2: $100 when the designer builds a working prototype shown functioning properly on a video clip. The clip will include the motor running and more importantly the motor automatically re-starting once the batteries re-charge.

Milestone 3: $150 when the designer releases all the parts web links, written parts list with exact specifications for each part and a short video or step by step guide to building the project.

Milestone 4: $70 When I have built a successful prototype, and if needed the developer answered any questions that came up during assembly.

Habilidades: Eletrônica, Desenho de Produto

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Acerca do Empregador:
( 14 comentários ) Sun City West, United States

ID do Projeto: #6835992

Concedido a:


Hi, I normally charge a lot of money for designing products, However this seems a little fun. I'll start with the breadboard, I used to use these when I was starting off in electronics! I can build it on a breadb Mais

$444 USD em 30 dias
(2 Comentários)

9 freelancers estão ofertando em média $665 para esse trabalho


hi, i am an electrical engineer. i have expertise in embedded system design and Matlab.i can help you with this project. Please check my profile for my previous work [login to view URL] bid here is the Custom design of comp Mais

$1800 USD in 20 dias
(34 Comentários)

Hi, Have a Great Day. I am running an R&D lab. we are team of highly skilled professionals. We can provide you fully working prototype. I will recommend to use PCB instead of using breadboard (my bid includes PCB Mais

$750 USD in 30 dias
(17 Comentários)

Hello, I am an Electronics and Embedded system developer. I have experience in Digital and Analog electronic design. Kindly check my profile. Reply me back and will discuss the details further. Thankyou

$600 USD in 10 dias
(10 Comentários)

Dear Sir, This is Ahmed Hamdy an Industrial and CAD Engineer for more than 8 years, I'm working as R&D Engineer for 4 years, I can do this project in a short time with a high quality with the lowest price I'm now worki Mais

$555 USD in 10 dias
(7 Comentários)

I am working as Lab Engineer at FAST National University Pakistan, in Electrical Department, I have conducted the followings Labs, and also supervised Projects related to these labs. 1. Circuit Analysis and Design Mais

$555 USD in 7 dias
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Dear employer, First of all, please let me thank you for posting a project with such detailed and clear description, together with milestones. I have a PhD degree in Electrical and Electronics Engineering from on Mais

$450 USD in 20 dias
(1 Comentário)

Hello. My name is Milos Sapic and I am a Electronics engineer with experience in PCB designe, i have experience with Altium designer and OrCAD you can see in my portfolio. Please choose me and you will not regret and Mais

$500 USD in 10 dias
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My past experience is as research and development engineer at automation company. I took some responsibilities to work independently or working in team. Responsibility: - Design and implement automation system using Mais

$333 USD in 7 dias
(0 Comentários)

hi, i will do it and start from now………kindly chat with me for more details…to understand it.. best regards, Dipti

$443 USD in 10 dias
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