This battery-powered micropower supply was shown in Radio Electronics magazine in 1991. The maximum current is 170 mA. and the integrated circuit is the MAX655 from Maxim.
With this circuit you can produce the sound effect passing from one channel to another. The...
The sensors in this circuit are NTCs and PTCs that work in a differential way by directly...
This basic configuration can be found in a lot of articles on this site. In this case, the relay...