This circuit is from a Radio Electronics from October 1963. The transistor is a power transistor of the time, and two transformers are used. The input has 10k impedance and is powered by 12 V.
This circuit adds a beep to turn on with car flashers that do not have this feature. A 47 ohm to...
In the figure we have the way to simulate an SCR using two complementary general-purpose...
This circuit different from the timer was found in an English publication from 1978. The circuit uses...