This circuit is a modification of the previous one, also found in the July 1995 Electronics Now magazine. The triac must be according to the controlled power.
We found this circuit in an English publication of 1976. It can be easily assembled by changing the...
This circuit is from an 80's documentation, applying to ordinary comparators. The source does not...
This experimental circuit is from a 1975s publication. The coil consists of 80 turns of wire AWG...