An analogue input in the range 0 to 7V is converted to a binary digital output in 1 V steps i.e. 1V is represented by 001, 2V by 010 etc. A switch converts the unit to 0 to 2V sensitivity so that low frequency sine waves from a signal generator can be digitized. The binary output is available at 4mm sockets for use with the companion DAC. An excellent system for demonstrating the basis of digital communications. A 12V d.c. input is required either from a smoothed bench PSU or mains adaptor.