This circuit only works with incandescent lamps and the frequency is adjusted in the pot, depending also on the capacitor. The triac must be equipped with a heat sink. The circuit is from an 80s manual.
This circuit was found in a Popular Electronics from the 90s. The circuit uses a general purpose...
This simple oscillator with a photocell was found in a Radio Electronics from January 1965. The...
Nothing more useful on the bench than a variable voltage source. This is the source we found in...