This circuit is from a June 1992 Radio Electronics. The circuit is for 4.5 MHz signals from old analog televisions or other similar applications.
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...