Using a standard multimeter, this circuit from a 73 magazine for radio amateurs provides an output proportional to the inductance under test. The circuit is TTL and must be powered with 5 V.
The 556 integrated circuit is a double 555. The heats of the components depend on the frequency and the...
This SCR relaxation oscillator was found in an 80's Electronic Design. It flashes a small...
This well-known two-transistor oscillator circuit was found in the April 1964 Radio Electronics magazine....