The Ford Barn

dlfrisch · 03-21-2015, 10:15 PM

Very recently, someone just had a thread about this situation. I could not find it, but ....

someone had a simple idea. I like the wiring schematic - wire from your tail light wire to a 6VDC buzzer, then through a IN4003 silicon diode and then attached to the generator output terminal. Electrically, it is a neat circuit, but I doesn't work using a 6V output alternator. Alternators have built-in diodes to convert the AC output to a DC output. Using the old original generator idea works OK. When the engine is shut off and the lights are left on the buzzer will sound. This warning circuit is OK if the lights are left on. When the generator is in use (putting out current) and the buzzer does not sound it is because, the circuit has the same polarity on both sides of the buzzer. When the engine is shut off the circuit now completes an electrical path through the generator and its internal wiring loops to a + gr. and with the light switch turned off and the generator not putting out current, the other side of the buzzer also has a + pole. (I think...! ) The positive electrical ground, always has me confused anyway, but at my age it's getting ....wht was I saing?

Does anyone have or maybe suggest a simple idea for this circuit? I have a 6V alternator in my '30 coupe.

03-21-2015, 10:15 PM	#1
dlfrisch Senior Member Join Date: Feb 2014 Location: Florida - 32128 Posts: 416	Buzzer / Beeper - when light are left on Very recently, someone just had a thread about this situation. I could not find it, but .... someone had a simple idea. I like the wiring schematic - wire from your tail light wire to a 6VDC buzzer, then through a IN4003 silicon diode and then attached to the generator output terminal. Electrically, it is a neat circuit, but I doesn't work using a 6V output alternator. Alternators have built-in diodes to convert the AC output to a DC output. Using the old original generator idea works OK. When the engine is shut off and the lights are left on the buzzer will sound. This warning circuit is OK if the lights are left on. When the generator is in use (putting out current) and the buzzer does not sound it is because, the circuit has the same polarity on both sides of the buzzer. When the engine is shut off the circuit now completes an electrical path through the generator and its internal wiring loops to a + gr. and with the light switch turned off and the generator not putting out current, the other side of the buzzer also has a + pole. (I think...! ) The positive electrical ground, always has me confused anyway, but at my age it's getting ....wht was I saing? Does anyone have or maybe suggest a simple idea for this circuit? I have a 6V alternator in my '30 coupe.