This flasher or light pulsator can be used in an ordinary flashlight. The circuit can be adapted to use a lamp instead of an LED. Transistors support equivalents. C1 determines the frequency range.
The frequency of the sound emitted by this circuit depends on the light intensity on the sensor....
This circuit is from a thyristor manual from On Semiconductor. It makes use of a PUT and a SCR...
This circuit uses only one NC75Z04 port from ON Semiconductor, but it can be implemented with...