I'm new to electronics and I've been trying to make a device that reminds my father to charge his scooter when he comes into the garage. Here is the circuit diagram:
Switch S2 is a footpedal / pressure plate where he will park the scooter. This causes the Buzzer to start making an annoying noise.
Switch S1 is a contact switch attached to the charging port of the scooter. Once the scooter is plugged in, the buzzer will go silent and the LED will light up instead.
I've made a prototype on the breadboard and it works as expected.
Essentially, this is an A.B' logic gate.
The problem that I see here is that, when the scooter is plugged in. I'm basically wasting power by dumping all the current through the transistor to the ground. Is there a way to solve this problem without wasting power? I intend to run this off some solar power and salvaged batteries, so I don't want to be wasting the little charge that I have.
I've tried using the two-way switch, but when both the footpedal is disconnected and the charger isn't plugged in, the buzzer turns on.
Please let me know if there is any clever way around this. Thank you.