"Hearst Magazines and Yahoo may earn commission or revenue on some items through the links below." A digital multimeter is an indispensable tool for testing, diagnosing, and troubleshooting electrical ...

Digital multimeters (DMM), once called voltmeters, have been described as the tape measure for engineers in the new millennium. With electronics and electrical circuits included in almost every ...

Back in the early days of electricity, lab workers could measure electric current in a circuit using an ammeter (galvanometer) and voltage using a voltmeter. From there, they could calculate ...