Today, I added the finishing touches to the schematic and finished laying out the board (auto-trace did most of that work). I added a bit more circuitry to protect the PIC from back EFM. I also added a decoupling capacitor to avoid any issues with the motors sucking up enough of the power to shut the PIC off. That being said, this thing is much more complicated than any of the boards I have made in the past... I'm a little worried I will have spent all that money ($17 for the board and $10 for the handling) and then all of the solder time to find out I did something wrong. We will see.
Below are the finished schematic and board.
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| Completed Mini Sumo Schematic |
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| Finished Mini Sumo PWB |
The board has the following features
- Four motor direction indicator LEDs
- Schottky EMF-protection diodes
- Diode protection from incorrect battery
- TX/RX connections
- Seven IR sensors (3 line sensors and 4 distance sensors)
- Total motor peak current of 5Amp (I think that is without a heat sink)
Lets hope it works.
This looks great! Good luck building.
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