When working around mains voltages, it can be useful to know whether a given circuit is live or not. While this can be done by direct connection with a multimeter, non-contact methods are available ...

This is the simple version of a white LED lamp that can be directly powered from mains. It can give ample light even for reading purpose. Capacitor Cx along with diodes D1 through D4 forms the AC step ...

After 13 years in our older home, we found the KAIWEETS KT301P Circuit Breaker Finder makes power tracing reliable and simple ...

This file type includes high-resolution graphics and schematics when applicable. Low-power applications such as e-meters (electricity or energy meters) often require a simple ac line-powered supply ...

You may use this wireless light switch instead of physical contact with switches which may be dangerous if there is any shorting. The wireless light switch circuit described here requires no physical ...