This circuit was found in a 90s Electronic Design. The circuit directly controls a triac that is loaded with a heating element. The triac depends on the power on the load.
This circuit, found in a 1958 magazine, is for reference only, since the components are not easy...
Found in Popular Electronics this circuit triggers an SCR and lights an LED when the location of...
This OF-1 LO oscillator was found in a 1980s American documentation. The transistor can be any...