allaccess
New Member
Please ignore/delete this thread. Problem fixed. Sorry for the inconvenience.
Is it possible for an LM324 to be damaged in such a way as all 4 op-amps still amplify but such a basic circuit fails?
Hello, I am trying to use an LM324 quad op-amp to build a basic function generator but i suspect the chip may be damaged.
When i perform a simple can-it-amplify test, all four op-amps pass: I attach a crystal earpiece to the +input, and an 8ohm speaker and a green LED to the output, and simply tap on crystal earpiece, and i get an audible click from the speaker and a flash from the LED when I perform this test on all 4 op-amps.
However, i have tried multiple google-search function generator circuits and none of them work. I get no square wave, and no reading on my digital scope, including this circuit:
Is it possible for an LM324 to be damaged in such a way as all 4 op-amps still amplify but such a basic circuit fails? I have tried constructing just the 1st stage and still get no square wave or output of any kind on pin 1.
Thanks, allaccess
Is it possible for an LM324 to be damaged in such a way as all 4 op-amps still amplify but such a basic circuit fails?
Hello, I am trying to use an LM324 quad op-amp to build a basic function generator but i suspect the chip may be damaged.
When i perform a simple can-it-amplify test, all four op-amps pass: I attach a crystal earpiece to the +input, and an 8ohm speaker and a green LED to the output, and simply tap on crystal earpiece, and i get an audible click from the speaker and a flash from the LED when I perform this test on all 4 op-amps.
However, i have tried multiple google-search function generator circuits and none of them work. I get no square wave, and no reading on my digital scope, including this circuit:
Is it possible for an LM324 to be damaged in such a way as all 4 op-amps still amplify but such a basic circuit fails? I have tried constructing just the 1st stage and still get no square wave or output of any kind on pin 1.
Thanks, allaccess
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