Found in a September 1992 Radio Electronics magazine article, this circuit generates a pulse as shown in the graph below the diagram. The timings can be changed by swapping C3 and C7.
When the remote connection is disconnected or interrupted, the lamp will come on. The transistors can be...
With a 22 V symmetrical power supply this amplifier provides 15 W of output power with excellent...
This circuit was obtained in a 90’s documentation. The operational amplifiers are from that time....