One of the most basic tools for tinkering with electronics is a multimeter. Today, even a cheap meter has capabilities that would have been either very expensive or unobtainable back in the 1970s.

One of the most basic tools for tinkering with electronics is a multimeter. Today, even a cheap meter has capabilities that would have been either very expensive or unobtainable back in the 1970s.

Back probes are used to test electrical connections. You attach the wire leads to a multimeter — if you aren't sure how to use a multimeter, here's a handy guide. Then, you use the sharp end to ...