In this circuit the triac conducts when switch S1 is opened. We found it in the October 1987 Radio Electronics magazine. The triac is controlled according to the load.
We found this circuit in a publication from the 90s. The circuit has a tuning range of 500 to 1...
This circuit was found in Radio Electronics from the 90s. The transducer is a tweeter and the...
This circuit can supply voltages in the range of 8 to 20 V with a maximum current of 3 A. The...