We found this circuit in the October 1987 Radio Electronics magazine. The triac must be controlled according to the heater. The transformer has a low current, of the order of a few hundred mA.
This simple digital circuit tester can work with TTL technology when powered by 5 V and with CMOS...
This circuit receives, through a coil, audio signals emitted by another coil connected to the...
This circuit is from the LM317's own manual obtained from an old documentation. The IC should be...