This timer circuit was found in a 1980s American documentation. Transistors and SCR support modern equivalents. The circuit was originally designed to control a motor.
This circuit transmits signals to an FM receiver placed at a distance of up to 200 m. The antenna...
The operational amplifier is not very common today, but in its place an equivalent, even of...
The circuit shown in the figure uses two of the four operational amplifiers found on the LM324...