I am working on a sailboat race timer. This device blows a car horn at set intervals to warn a sailboat fleet of an impending start. My primary use is for solo practice on vacation. The unit runs from an MSP430 processor and a small motorcycle battery. Currently I am hung up on a problem where the processor reboots each time the horn blows. It must be a ground bounce/current spike problem, but I have not been able to track it down. I even separated the power systems via an optocoupler and it still reboots.
Swapped the MSP430 for a PIC and things seem to be working much better. Now I can run the whole thing off the same 12V motorcycle battery without needing a separate power source for the electronics.
Next step is to start board layout.
- Design: %90
- Construction: %60
- Test: %20