Many tools can be used either for good or for ... driven by an Uno and a Bluetooth module, so he can trip his circuit breakers from his smartphone, naturally. He did find one circuit in his ...

This is where circuit breaker testers become essential tools in your arsenal ... the device displays the trip time of GFCI devices. This helps you quickly determine if they're functioning properly.

Arc-fault circuit interrupters (AFCI) are special circuit breakers that listen for this noise in the power line and trip when they hear it. The problem is that they can be so sensitive that they ...