- Published in issue 12/1999 on page 0
High-resolution AC/DC voltmeter with LED display
Voltmeters with LED display are very useful instruments for repair and maintenance work on electronic equipment. Unfortunately, their resolution is normally poor: of the order of ten per cent at the top end of the range. The instrument described in this article has a resolution at least twice as good and also measures audio frequency signals up to 10 kHz with small error.