This circuit was obtained from a General Electric publication from the 1960s. The transistors are from the time and the circuit produces a 1 kHz signal with 1 V input.
This circuit only uses two general purpose transistors triggering a sensitive relay. Never supply...
This circuit was found in a 90’s Popular Electronics. The power transistors must be equipped with...
This circuit uses a common digital clock to activate a relay at a programmed time. The circuit takes...