- on Miscellaneous Electronics
- Published in issue 7/2004 on page 0
Relay Coil energy Saver
Some relays will become warm if they remain energised for some time. The circuit shown here will actuate the relay as before but then reduce the ‘hold’ current through the relay coil current by about 50%, thus considerably reducing the amount of heat dissipation and wasted power. The circuit is only suitable for relays that remain on for long periods.