This circuit was found in the September 1984 issue of Radio Electronics magazine. The circuit is based on a 555 and a MOSFET consisting of a flasher that controls a buzzer.
This drain dip oscillator was found in an old English documentation. The JFET can be of any type...
This circuit was found in a 1977 timer cookbook. The circuit can generate signals with up to 99%...
This didactic circuit was found in an English publication of 1965. The sensor is an LDR and...