This circuit was found in a Ferranti documentation from 1969. The transistors are common types of the company at the time. Smaller equivalents may be used. The output power is of the order of 150 mW.
The first configuration we show is a flip-flop that can be triggered using two push buttons of the...
This circuit is used for cable checking. We found it in the Radio Electronics magazine of December...
This interesting circuit causes a set of LEDs to flash at a speed controlled by the CI1 in an...