This circuit was found in a 1971s English magazine. We can still assemble it using BC548 transistor. The other components are common. The supply voltage of 6 or 12 V depends only on the relay.
This bistable circuit that drives a relay with a pushbutton was found in the March 1pp6 issue of...
This small transmitter for the medium wave range (MW) was found in a 1980 publication. Its signals...
When the base of the general purpose transistor is grounded the circuit produces a signal that is given...