This high quality circuit with complementary symmetry was found in an Electronics World of 1966. It can be made with modern transistors like the BD or TIP series.
This circuit can turn-on (only) a load (relay or lamp) when S1 is pressed. The circuit can be used as...
We found this filter in the 1990 Motorola Linear Databook, but it can be implemented with other...
This 1969 Philips documentation circuit makes it possible to control an engine through the sound...