That would be easy to draw up in eagle
easy if you know how...
attached to the board:
- buzzer (just a pc case piezo)
- pot (needs to be accessible from outside an enclosure, so maybe attached, maybe not?)
- 2x switch (needs to be accessible from outside an enclosure, so maybe attached, maybe not?)
the LSM303 need to be far away from the motor as it interferes. so not on the board.
i will need to use a different relay, the one i have is archaic and shit (suggestions?). the switches can be any momentary on push buttons.
im not 100% that my transistor set up is the best. It takes the relay to ground when the pin is HIGH. Ive used a BC548 to do it. But, it was my last one, and i stupidly hooked up the power backwards, now the smoke has fallen out.
i have a more BC558 but i dont think they will work.