Many battery powered devices use two AA alkaline cells. Often you will not know when it is time to replace the batteries until the device powered by them actually stops operating. The hobby circuit ...

Here is a VLF receiver tuned to 300 kHz designed to detect the crackle of approaching lightning. A bright lamp flashes in sychrony with the lightning bolts indicating the proximity and intensity of ...

Masterpact Low Arc Flash circuit breakers are designed and tuned to provide balanced protection for both overcurrent and arc flash. The breakers incorporate a blow-open design that clears faults ...