Hello,
Excuse me, it is probably a very very beginner question
I've been looking for a simple car battery/lead acid battery charger using 12V Linear Transformer to charge 1Ah to 100Ah (or literally any capacity) car battery/ lead acid battery, and then i found this one
I think there are something wrong with this circuit, my analyze is the relay will be cut-off when the voltage is around 11V, and when the voltage is above 11V the relay is on, and will never going off again except the voltage is going down to 11V, so i think it is more likely a Overdischarge protection circuit rather than a charging circuit,
But if i flipped the the op-amp non-inverting and inverting input, and change the +12V (which is a supply voltage) on the inverting input (after flipped the input) side of op-amp to battery voltage instead, the relay will be off when the voltage exceed 14.2V and turn on again when the voltage is going down to 12.2V.
Are my analyze is right?, this charger will be working when i flipped the op-amp input.
If you have any ideas please tell me, or you have a suggestion on a simple car battery charger.