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Registered Member #1696
Joined: Sat Sept 13 2008, 06:01PM
Location:
Posts: 21
I am building a boost converter, which needs a LM311 chip. I went to the local electronics shop and the owner told me a c311c is the same thing. my converter worked, but the c311c chip didnt't I bought a new one, and build a separate circuit to test them both. now comes the weird part: the old c311c chip made the led light up, the new one didn't so, my question is, does any of you know a easy circuit tot test my comparator? and what did I do wrong?
Registered Member #95
Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
Reduce the 15k in series with the potentiometer to ground down to 10k or so. Remember that the negative input has to become slightly less than the positive if you want the LED to turn off. With the correction your circuit should be able to test op-amps.
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C311C Problems :S
