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Vintage threads from the first ten years
Re: LDR emulation
:
 7/1/1999 9:43 PM |
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R.G. |
Re: LDR emulation Two things come to mind. First, you're having a self oscillation which could be from one of a number of things, but I recall from a conversation with Mark Hammer on that schematic back in the dim reaches of history that there should be a connection dot where the trace from the 0.022u7F capacitor that connects to the 220K resistor crosses the line from the LDR to the junction of the 22K resistors. That may be part of the problem. I have built this (with the correction in it) and it does work. This is a possible cause of your problem, but there may be others as well. Make the fix, then let us know what happened. |
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