Published in a PE Hobbyst Handbook of 1991, this sensor uses an integrated circuit that is unusual today. The circuit is based on a high frequency oscillator.
September 2016 - can be purchased from Mouser Electronics the new transceivers MAX348x and MAX349x from...
This circuit was found in a 1978 English magazine. It is a configuration that aims to select the...
This simple rhythmic light for incandescent lamps can be found in old English documentation. The...