This circuit was found in an Elektor from the 90s. Next to the circuit we have a table with the delays obtained when the circuit is connected according to the positions of the selector switches.
This 100 kHz crystal oscillator uses 7404 to generate square signals. We found it in a Popular...
This circuit can be used as a shield for the control of stepper motors from microcontrollers. The...
This circuit uses a double MOSFET, a component not very easy to obtain today. The circuit is from...