During evaluation, also experiment with the effect of vibration. At reduced voltage, a relay may easily drop out upon vibration—this may be aggravated if the relay has a stepped response. A typical ...

An RC circuit in series with the coil allows full-current turn-on for reliable relay operation, then reduces the current to save power. Fellow engineer Sanjay R. Chendvankar of Mumbai, India ...

1. The well-established relay-driving circuit uses an optocoupler to isolate the grounds and noise coupling between the low-voltage digital-control signal circuit (left) and the relay as load (right).

Figure 1 shows a simple circuit using the MC9S08QE128 microcontroller from Freescale to drive a Finder 40.61.6.005 single-coil latching relay with a standard ULN2003 Darlington driver with open-drain ...

The new connected relays will allow homeowners to monitor and control their energy at the circuit level, including electric water heaters, ovens, HVAC systems, or any other circuit. For example ...