This unit will accept a d.c. analogue input in the range 0-7V and convert it into a digital output. As the input increases from zero in 1 volt steps the output LEDs give the input value in binary code up to the 3-bit maximum of 7 volts. The digital outputs are also available at the three 4mm sockets and sockets are also provided for the 0V and 12V supply lines so that a potential divider can be easily connected to provide the input. As an extra facility the sensitivity may be switched to 0-2V for use with smaller amplitude a.c. inputs. An external 12v d.c. regulated supply is required.

As an extension to the ADC above this unit will accept a 3-bit binary coded digital input and convert it into a 0-7V analogue output. Gain and Zero controls are provided so that the analogue steps can be adjusted to exactly 1V. Digital inputs can be provided by switches or by the ADC above and full instructions are supplied for connecting a sine wave input to the ADC and displaying it as a stepped analogue output from the DAC.
If used on its own this unit requires an external 12V regulated supply such as the battery eliminator . If used with the ADC above the same power source drives both units.