This circuit was obtained from the February 1992 Radio Electronics magazine. In it, a bar of 4 LEDs flashes continuously at a speed given by C1 and the setting of R3.
The circuit presented is suggested by Mullard (Philips) in an old manual. The circuit uses a...
This small-range MW transmitter can be used as a wireless microphone. The circuit is from an...
This circuit was found in a 1987 Radioaficion Microcomputacion magazine. This Spanish magazine no longer...