- Published in issue 7/1995 on page 114
Measuring the current drawn by an apparatus is always a rather complicated matter. If a shunt resistor is placed across the positive supply rail, the measured voltage has, by definition, an offset equal to the supply voltage. lt is, of course, much simpler to place a resistor in series with the negative supply line, but, owing to various circumstances, that is not always possible. A better way is using the circuit shown in this article.