From: JBilderback <ji...@hu...> - 2002-12-25 22:42:41
|
>>The bad(?) part is that this waveform decays or even vanishes >>when I move my hand over the power supply section of the >>breadboard. > > I don't know if this is possible -- but could it be that the > opto-couplers are sensitive to light or heat (i.e. infra-red > radiation) in the environment? Just an idea, to add to the > possibilities to test for (e.g. does a piece of card have the same > effect as you hand?) > I'd think a breadboarded circuit (with it's extensive wiring, unknown quality of connections and grounding, etc) would be subject to many influences that don't manifest themselves to the same project on a PCB. |