We found this circuit with transistors in a Philips documentation from 1968. The double transistor can be replaced by discrete married types. The power supply is symmetrical.
This is the name of an interesting lighting effects device for discos, ballrooms or even shop...
This simple PWM control was found in American documentation. We can use any power transistor...
This digital buffer was found in the November 1993 issue of Electronics Now. The power supply...