I accidentally ordered a bunch of 7660's a few months ago and now realise they are not the 7660S version that allows the frequency to be boosted above the audible spectrum.
I've tried all i can think of to filter out the 10khz oscillator that bleeds through. Im using the 7660 to get +9V & -9V. Caps from power rails to ground with and without a small series resistance doesn't seem to have an effect. Ive even taken it off the bread board onto vero to rule that out.
7660 Filtering Question
- reneshelle
- Solder Soldier
The easy way. Buy other chips.
I've tried using them as well, and I've found that it's all about how you use them. Search around a bit and I'm sure you be wiser. I've found that even wires running close by can produce the sound...
I've tried using them as well, and I've found that it's all about how you use them. Search around a bit and I'm sure you be wiser. I've found that even wires running close by can produce the sound...