Maker Pro
Maker Pro

I need help from a Genius

exhale666

Nov 9, 2012
1
Joined
Nov 9, 2012
Messages
1
So! I got a relay from Radioshack which requires a 9v 500ma to function. I'm using a 9v battery but it only lasts around 24 hours and I need it to last 5x that long on a battery. So I'm guessing I need a bigger battery but how would I not overload the relay? It goes without saying I don't know much about electronics

Is there a genius here that could help me with this? a shopping list would be awesome
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
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25,505
Get a relay that requires 9V at 100mA (or less).

One option is a solid state relay (you don't say what you're switching) which will require a far smaller current.
 

CocaCola

Apr 7, 2012
3,635
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Apr 7, 2012
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3,635
Depending upon the off cycle it might be best to simply use a NC relay, and then you only need to power it when the relay is 'off' during the 'on' cycle it needs no current... For long on times with short off times this will save a ton of power...
 

galaxy

Nov 3, 2012
28
Joined
Nov 3, 2012
Messages
28
Maybe a latching relay?
Probably be good to tell us what the relay is used for. An energised time of 5 days plus is a long time, there may be better ways to do it than with a relay.
 
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