I have built a project that uses the baby orangutan motor pins to send a voltage to operate the dash fuel gauge on my 1940 Ford. The orangutan is programmed to measure/calculate the variable resistor in the gas tank float mechanism in ohms (through the use of a voltage divider using Vcc as the reference voltage) then send the correct voltage to the dash fuel gauge. This all works fine and the gas gauge reads correctly. I might note that I use one of your voltage regulators (your #2861 - 9V output) to power the orangutan from the car’s 12 V electrical system. The problem I just had was that I had to have the car jumped when trying to leave a car show and after that the gauge read empty (basically a 0 V input). I bench tested the circuit and realized that the program had been erased or at least messed up and no longer sent a voltage to the fuel gauge. Reloading the program fixed the problem and all is working again.
Could this have been the result of a surge due to jumping the car? Any other possible causes? Any suggestions on how to avoid the problem in the future?