This 1 A circuit was found in a Philips documentation from 1966. The transistor is of the time, but a modern transistor of equivalent power can be used.
This flasher was found in an old Hands On, but uses common components. The optocoupler can be...
This type of oscillator uses an unusual configuration and can be used as a time base, metronome or rhythm...
This circuit, from the 1977 GE semiconductor manual, uses a unijunction transistor beyond the...