Found in an American publication from 1968, this circuit generates pulses at a rate of 2,500 per second. The transistor can be replaced by a modern equivalent.
Found on a 1965 Radio Electronics, this circuit fires a signal xenon lamp applied to the SCR from...
In the figure we have the typical configuration of a sinusoidal audio oscillator with twin-T. The...
Found in an American documentation from the 90's, this 1.5 A power supply provides 1.5 to 22 V of...