Traffic Light System (Motherboard Design)

Avg Bid (EUR)
Project Budget (EUR)
€250 - €750

Project Description:
The designed motherboard should control a portable traffic light.
It should control 3 high power LED circuits (+12V power from battery and solar)
It should be developed on the .NET Micro Framework, we will do the software part ourselves, we only require hardware design.

Here is a reference picture (NOTE: only the motherboard is to be designed and developed NOT the whole traffic light):

The end-user front end should look something like this:

Board front-end should have:

1x double seven segment display
6x LED's
6x buttons

Board backend should have:

3 mosfet outputs to control 3 high-power LED cuircuits

Here are some reference hardware designs (open-source with pcb layouts and schematics) which can be used to get a general idea,
ultimately we would need this on a single board.

1. .NET micro mainboard in DIP40 format with USB programing access, for easy plugin to the board. - it could be used if the .NET chip directly on the traffic light board is either too complicated or too expensive to design.

2. high-current load module can be used to see how to design the 3 outputs to control 3 high-power LED circuits

3. max module can be used to see how to design circuitry to control double seven segment and 6 signalling LED's

4. USB Client DP Module can be used to see how to efficiently provide power circuitry from a +12V battery and solar power

Design of a prototype is welcome.

Manufacturing suggestions inside European Union are also very much welcome.

Any other relevant information will be discussed as asked.

Additional Project Description:
08/31/2013 at 11:01 CEST
Reference images:

Skills required:
.NET, Electronics, Microcontroller, PCB Layout, Product Design
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