Relays are used to connect, or disconnect, ring generators to-and-from telephone lines. If the two points are at different potentials, there are high-current transients at the moment of contact. This ...

Rohm recently introduced a low-power 600V-tolerant zero-crossing detection chip, intended to cut energy wastage in home appliances by reducing sense current through the high voltage monitoring ...

There are many circuits publishedshowing zero-crossingdetectors for use with 50- and60-Hz power lines. Though the circuitvariations are plentiful, manyhave shortcomings. This Design Idea shows a ...

Explanation of how a diode divider can tame powerline noise on a zero-crossing detector's input circuit, improving ZCD sensitivity. To properly control ac sources using solid-state devices, you need a ...

For one-off projects or prototyping, it’s not too hard to find a wall wart or power supply to send a few joules of energy from the wall outlet to your circuit. Most of these power supplies use a ...

Rohm recently introduced a low-power 600V-tolerant zero-crossing detection chip, intended to cut energy wastage in home appliances by reducing sense current through the high voltage monitoring ...