This circuit was found in Radio Electronics magazine from October 1964. The circuit uses two transistors of the time that require a supply voltage of 9 V. Consumption is 2.5 mA.
Found in a 1970 publication by General Electric, this circuit makes use of a mobile...
This circuit switches on an external load after a certain interval given by the capacitor. The...
Using common SCRs like the TIC106, this circuit is loaded with incandescent bulbs, but can be...