This circuit was found in a 73 magazine for radio amateurs of the 90s. The circuit uses two types of indicators, the diodes are for general use. The power supply is 5 V.
Two inverters, of the 6 available in a Low-power Schottky 74LS04, are used in this anti-ring...
This old dimmer with SCR appeared in Radio Electronics magazine in February 1962. SCRs were just...
The supply of this circuit can be done with voltages from 8 to 28 V and the maximum output current is...