This circuit shows how to make an adaptation on an AM receiver to receive CW and SSB signals. The circuit is from an 80's documentation. The diode is commonly used.
This circuit can be used as a shield for the control of stepper motors from microcontrollers. The...
This circuit was found in a 1960s Motorola documentation. Transistors are types of the time and...
In the figure we have two possible configurations for multivibrators with relay. The idea comes...