> Is it convenient to try putting an choke in series with the OLED's > power supply line, with the OLED's bypass capacitor on the OLED side > of the choke?
Hmmm... 100uH power inductor, no change. > I've only used those two methods, aside from probing around with > an oscilloscope to look for the noise. One other trick that I've > not tried (if anyone can comment on this I'd appreciate it) is to > use an inductive pickup probe to look at the *current* waveforms on > the supply lines to different parts of the circuit, and see what > corresponds to the noise you're hearing. I don't think my parallel-port scope is sensitive enough for that. Plus, anything with a coil just picks up magnetics from the switcher's inductor, but the switcher isn't the supply that provides the +12v. > > 2. What kind of components *can* make that kind of noise? > > Inductors and PCB traces, mainly...but I suppose nearly anything > probably could, to one degree or another. PCB traces? > > 3. If you know what's causing it, how do I fix it? > > Hot glue, molten wax, conformal coating.. I've tried pressing on various parts of the board to no avail. _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
