Hi
I am working on a circuit for my car to turn on a relay when the voltage is above ~13V (engine running) and keep it on even if the voltage drops.
It also has a input to turn the relay off,
so far I have working circuit on a breadboard mostly by guessing and looking for similar circuits in the internet
but I'm not sure what protection is needed as it's for an old car with very simple electrics (so a pretty "dirty" 12V)
I'm hoping I can get away without too much as the PCB have to be small.
I would really appreciate any suggestions.
thanks in advance.
I am working on a circuit for my car to turn on a relay when the voltage is above ~13V (engine running) and keep it on even if the voltage drops.
It also has a input to turn the relay off,
so far I have working circuit on a breadboard mostly by guessing and looking for similar circuits in the internet
but I'm not sure what protection is needed as it's for an old car with very simple electrics (so a pretty "dirty" 12V)
I'm hoping I can get away without too much as the PCB have to be small.
I would really appreciate any suggestions.
thanks in advance.