We found this configuration in a 1990 Poptronics. The circuit can be powered by voltages between 6 and 15 V, changing the resistors in series with the LED. The frequency is set at R7.
We found this circuit in a 1965 General Electric manual. The circuit applies to incandescent lamps only and...
This simple circuit was obtained in a Portuguese publication in 1979 but can be easily assembled with...
In fact, it is a night light system that automatically turns on the outside lights when it gets...