This circuit, for frequencies up to 100 kHz, was found in American documentation from 1970. The circuit can serve as a reference for projects with modern equivalent components.
This circuit was found in an English publication from the 80's. It triggers a buzzer (with...
This circuit automatically turns off small battery-powered devices after a certain amount of time,...
This is the application note circuit of the integrated circuit used with the LASER diode. The...