This 1.2 to 32 V x 3 A regulator was found in an 80's EDN. The power components must be equipped with good heat sinks.
The displayed relay operates with an audio signal applied to the input. The transistors can be...
Found in a 1980s Electronics Now, this circuit uses common components. Transistors are commonly...
To control relays or DC motors safely with double isolation via the parallel port, we suggest the...