This circuit was found in a Ferranti documentation from 1969. The transistors are common types of the company at the time. Smaller equivalents may be used. The output power is of the order of 150 mW.
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...