Is the battery empty, or is there something wrong with the device? That’s always a difficult question when your walkman or some other battery-powered device appears to be dead when you switch it on.

This circuit runs a fast battery test without the need of power supply or expensive moving-coil voltmeters. It features two ranges: when SW1 is set as shown in the circuit diagram, the device can test ...

The importance of calibration for all electronic test equipment. The main reason why such equipment must be regularly calibrated. The pros and cons of self-calibration or using outside services. It’s ...

For example, if you have a battery test system with a single-ranged current measurement system, the tester will have a single current measurement accuracy specification like ±0.2% of full scale. If ...