REMOTE CONTROLLED POWER OFF SWITCH

REMOTE CONTROLLED POWER OFF SWITCH - CIRCUIT IDEAS...

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CIRCUIT IDEAS 104 • OCTOBER 2005 ELECTRONICS FOR YOU WWW.EFYMAG.COM ± DEBARAJ KEOT REMOTE-CONTROLLED POWER-OFF SWITCH S.C. DWIVEDI R emote controllers for various audio/video systems are usu- ally provided with a power ‘on’/‘off’ or standby-mode selector button. But turning the system off from the remote handset actually does not cut off the whole system from mains. Some circuitry inside the sys- tem continues to get power from mains even when the power is turned off us- ing the remote handset. One needs to turn off the mechanical switch pro- vided on the system’s front panel or wall outlet in order to turn off the en- tire system. Also, accessories like TV boosters, stabilisers and additional ampli- speaker systems cannot be turned off from the remote handset. And it is very annoying to get out of bed to switch off mains after watching some programme on TV or listening to mu- sic. The circuit given here can discon-
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REMOTE CONTROLLED POWER OFF SWITCH - CIRCUIT IDEAS...

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