This is the circuit of a modified Heathkit kit. The circuit was found in a Radio Electronics from December 1965. The author of the circuit included improvements to the original circuit.
This simple 5.6 V regulator circuit was found in a 1966’s Philips. The zener can be changed to...
This circuit is from a 1982 publication. It is a sequential effect of accelerated and intermittent LEDs....
This circuit makes an incandescent lamp blink in order to vary its brightness with a candle...