This circuit was obtained from a Philips documentation from 1970. It can be built on modern operational amplifiers.
This simple power or speed control for DC Motors uses a Power MOSFET as driver stage and a 4093 IC as...
This PLL circuit includes a small amplification stage. We found it in the December 1989 Radio...
This egg timer has been found in an English magazine that no longer exists in 1982. The...