This light effect circuit was found in the July 1971 Radio Electronics magazine. The circuit is powered by 110 V mains but can be modified depending on the triac and lamp.
We found this ladder-shaped signal generator circuit in Radio Electronics magazine from August 1966....
This powerful regulator, shown in the figure is for 5V (TTL) is suggested by Motorola and makes use...
The L3 coil is what basically determines the resonant frequency, around 1 MHz, in this oscillator found...