This mono circuit for 10 LEDs was found in the January 1991 Radio Electronics magazine. It is powered by 12 V.
Found in a 1990s Motorola documentation, this high voltage circuit uses a PUT that is not a common...
This circuit was found in a Popular Electronics from the 90s. The frequency range generated...
This circuit was found in a 1963 magazine, but can still be easily assembled with some current...