A blast from the Elektor archives: this 1998 battery tester uses a simple LED display to reveal a battery’s true condition under load — even below 1 V.

We may receive a commission on purchases made from links. When undertaking DIY electrical projects at home, safety should always come first. Whether you're adding a dimmer switch, installing a new ...

Having good contacts is important – not only in your daily life, but also in electronics. In contrast to social contacts, the reliability of electrical contacts can be checked quickly and easily.