We found this circuit in the February 1987 issue of Radio Electronics magazine. It is based on an integrated RCA triac trigger available at the time. The circuit powers 4 incandescent lamps.
This circuit was found in a Popular Electronics from the 90's. The power transistors must be...
This circuit simulates a resistor controlled by digital signals. We found it in American...
This is the circuit of a small commercial amplifier from the 1970s from Philips Argentina. The...