This simple circuit was found in a Japanese magazine in 1967. The circuit is listening on a headset and the coil is 50 + 50 turns of wire 28 or thinner on a ferrite rod.
This simple speed control for 3 to 15 V motors uses a common power transistor. The circuit was...
The SN76477 integrated circuit of the 1980s was a great success as a sound effects generator. Many...
This circuit with 10 MHz and 1.25 MHz TTL outputs was found in an American documentation from the...