This circuit causes an LED to flash at a frequency determined by the capacitor. The circuit is powered by only 3 V and can be used for signaling.
This circuit was found in an English magazine from 1983, but it can be assembled with BC548 for...
This configuration is found in other LM317 manufacturer's manuals. It is a regulating circuit in...
This fuzz effect for guitars was found in an American 1980s documentation. The transistors may be the BC549...