- on Home & Garden
- Published in issue 7/2010 on page 44
(Summer Circuits 2010 article)
Here’s a rather special voltmeter that will let you measure the AC grid voltage and also see very accurately how it fluctuates around its nominal value. The voltmeter has a measuring range of around 50 V that you can centre around 220 or 240 V to suit your needs. The circuit uses a bridge supplied at low voltage to make it easier to implement.