This circuit was found in a 1967 Japanese documentation. It consists of a touch control system with two transistors from the time. The circuit uses a power source and sensitive relays.
The CMOS TLC555 [equivalent to the bipolar 555] can be used as a monostable in the configuration...
This unijunction relaxation oscillator can be used as a very useful signal injector. The circuit is...
A low frequency or audio frequency generator is an almost indispensable instrument in which it...