modified 12 years ago

Ac DC indicator

01:25:56

It indicates DC(BLUE) and AC(RED). 

published 12 years ago

hamilton1300

12 years ago

I notice that if you reverse the polarity of the DC it indicates AC

rbrtkurtz

12 years ago

Also, it won't detect a DC voltage below 15V.

Voltransistor

12 years ago

@hamilton-it will eventually stop. It's at .02Seconds/1Second so it goes away fast. Remember, AC is DC reversing at a fast rate.

Voltransistor

12 years ago

@rbrtkurtz-I can't figure out to regulate the input. I'll figure it out.

hamilton1300

12 years ago

Increase cap at bottom right to 6uf, change 1m resistor above it to 100K, change resistor on right from 47K to 10K. Then it works at 10v DC.

hamilton1300

12 years ago

I liner this circuit, I wish I had a better understanding of transistor theory

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