This Design Idea describes a handy continuity tester with two modes of operation: It may sound if it detects continuity between its two probes, or it may sound when it detects no continuity. The ...

Hastings new voltage tester ensures safety for line workers by giving them the voltage information they need to make the right decisions on the job. This live tester, non-contact voltage detector uses ...

Fig 1. The voltage measurement circuit includes the ability to test secondary voltages of either polarity for deviations of 1%, 3%, 5%, and 10%. Fig 2. The schematic of the secondary-voltage tester ...