I have an electrical scooter which has a "Hall Effect Sensor" in the handle-bar, measuring the magnetic flux to determine the amount of "gas" or gauge.
This sensor tends to burn out quite frequently. I replaced it with a potentiometer for a while which worked out great. The only problem is that I can't control it (safely) wearing gloves, and I can't drive in the current temperatures without gloves... So I'd like to give the hall sensor a go again, but add some circuitry to protect it against voltage peaks. I measure 5 Volts across the gnd and "plus" pins. I'm not sure how high the spikes can go, but the serial array of 6x12V batteries delivers more than 80V in total (The 12V Lead-gel batteries actually deliver more than 13V each).
I have found quite some delay-start circuits on Ebay, but they only cover one channel and need a 12V source. I'd need 3 channels (since I don't have a clue what is actually spiking) and I don't have a 12V supply at hand (at least not linked to the switch, bridging one battery would not help).
Adding a capacitor over the sensor might work as a buffer, but it also might decrease it's responsiveness, unless I only apply it to the plus and gnd pins and assume the sensor pin is not spiking.
Adding an extra manual switch would be a last resort, which could also be easily forgotten.
Any other ideas for ways to protect it?