This simple timer for incandescent lamps or other non-electronic charges uses a triac as a control element. The triac must be mounted on a heatsink and the time obtained depends on capacitor C2.
Unlike white noise, pink noise has a spectrum whose amplitude decreases with frequency. This...
We found this circuit in the April 1992 issue of Radio Electronics magazine. The circuit uses an...
This circuit sends its signals through a wall acting as an FM spy. The circuit is from an...