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.
This circuit was obtained from 1967 documentation. It uses a sensor to determine the trigger...
Found in an old Popular Electronics this circuit can also be adapted to be used as a shield. In...
This one-digit TTL modulus for 7-segment display can be parto f digital projects. Many of them can be...