Hi all, I got this circuit off the Internet. It is a low voltage alarm for a 12v leisure battery.
I've had it working partially, but once it lights the LED it won't turn off again if I turn the preset down again, or even if I turn the voltage up.
also if I turn the voltage up to more than 12v, suddenly lots of current flows and the chip fails. I have put a 10k resistor between pin 2 and the preset to try and protect the chip but it makes no difference. Any ideas?
I've broken about 4 chips now
I've had it working partially, but once it lights the LED it won't turn off again if I turn the preset down again, or even if I turn the voltage up.
also if I turn the voltage up to more than 12v, suddenly lots of current flows and the chip fails. I have put a 10k resistor between pin 2 and the preset to try and protect the chip but it makes no difference. Any ideas?
I've broken about 4 chips now