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Vandal proof switches

Prosta · 2004-10-05 16:00:00

Been looking at the Vandal proof switches in maplins. http://www.maplin.co.uk/Module.aspx?ModuleNo=12203&TabID=1&source=15&WorldID=&doy=5m10 Got 1 elsewhere but I have no clue how I'd wire it up. Anyone else used these? I dont want to blow the led by giving it too much juice. Says something like 2v@2ma. Do I have to stick…

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05-10-2004 5:00pm

#1

Prosta

Registered Users Posts: 165 ✭✭

Join Date: February 2004

Posts: 145

Been looking at the Vandal proof switches in maplins.
http://www.maplin.co.uk/Module.aspx?ModuleNo=12203&TabID=1&source=15&WorldID=&doy=5m10

Got 1 elsewhere but I have no clue how I'd wire it up.
Anyone else used these? I dont want to blow the led by giving it too much juice.
Says something like 2v@2ma. Do I have to stick a resistor on the wire or wha?

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#2 05-10-2004 6:50pm
Capt'n Midnight

Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,566 Mod ✭✭✭✭

Join Date: March 2003

Posts: 89804

yes you need a resistor.

12V supply => 12-2=10V to be dropped => 10V = 2mA x 5 K ohms
5V supply => 5-2=3 to be dropped => 3V = 2mA x 1.5 K ohms

E&OE

if an AC supply a diode too.

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