Activate a 12v relay with a 1.5v source

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haven4me

Member - Posts: 1

Joined: March 09, 2004

Location: United States

Posted: March 18, 2004 at 6:52 PM / IP Logged

Ok, heres the question...how do I trigger a 12v spdt relay with a 1.5 volt source(pager)? I am using a pager to activate an array of relays that will remote start my bike. The pager does not have enough voltage to trigger the first relay so I want to trigger the relay via the unknown component. PLEASE HELP! Running out of time on this one. Any advise on what part to use and where to get it would be greatly appreciated.

Mike

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xetmes

Silver - Posts: 586

Joined: May 18, 2003

Posted: March 18, 2004 at 8:54 PM / IP Logged

easy, use a transistor to sink current on the relay, search on these forums for "transistor" and you should get some diagrams...

auex

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Posted: March 18, 2004 at 10:54 PM / IP Logged

Are you sure that you aren't trying to make a remote detonator? Just kidding.

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Activate a 12v relay with a 1.5v source

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