This circuit was found in the December 1992 issue of Radio Electronics magazine. The current is a few mA and the maximum input voltage is around 12 V.
This circuit is from a thyristor manual from On Semiconductor. It makes use of a PUT and a SCR...
This circuit is powered by only 3 V and can flash white LEDs from 3.2 to 3.6 V, as it includes a voltage...
This 80's circuit uses a germanium transistor like the AC121. The circuit has an output...