Found in a 1967 Electronic Design, this transistorized circuit compresses and then expands a pulse. The circuit has a double adjustment and the transistors are of the time.
This high speed laser diode driver was found in a 1980s documentation. Power FETs can be replaced...
This circuit is from an old publication about transistors, using types of germanium that are no...
This circuit uses an LDR as a sensor to trigger an LED indicator at a preset lighting level. The...