- Published in issue 9/1998 on page 50
Multiple test card:
It is often necessary for an electrical quantity to be measured and displayed, so that a certain action can be instigated if and when it has reached a limiting value. Today, this is readily accomplished with the aid of a processor and a good quality analogue-to-digital converter (ADC). This article describes the design of such a setup, complete with power supply and a number of input and output facilities.