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.
This circuit of a 73 American magazine from the 1990s can generate multiple frequency signals from the...
This simple SCR alarm circuit was found in an old Poptronics, but can be easily assembled as all...
Found in old documentation, this oscillator with the LM380 produces an audio tone in a speaker....