device help

gaubien2000

I need something like a switch which will have 2 power sources connect to it ,12v and 5 v, there are no current go through this switch, only i active the 5 v power source then it allows 12 v go thought, i dont know what this switch or this device called, can anyone help me out? im trying to control a lamp 12v with a bs2 using IR. thanks so much.

Bruce Bates

gaubien2000 -

All you really need is a SPDT (single pole double throw) switch in any configuration of your choosing. They come with solder tabs, screws, flag terminal ends, and many others. Here's how you wire it.

What is often called COM (common terminal) will be your OUTPUT. Then you just hook each of the other wires onto the end terminals. If that's not clear, let me know, and I'll try to give you a better wiring description.

Regards,

Bruce Bates

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When all else fails, try inserting a new battery.

Duffer

It sounds like a simple NPN transistor might do what you're looking for. Look at http://www.kpsec.freeuk.com/trancirc.htm·about the middle of the page, "Using a transistor as a switch" for the circuit description and help choosing the components you'll need to make it work properly while protecting your microcomputer.

Duffer·

$WMc%

gaubien2000

I think Your looking for A soild state relay or maybe A "opto-iso" or maybe a 2 or 3 state latch????

lookup soild state relay
lookup opto 22
lookup Crydom
lookup 2 and 3 state latch's
By "lookup" I mean a "google" or someother search

If You still don't see what Your looking for send A postreply with Your finding's or the lack thier of in Your post,And somebody will come up w/ A new Idea..........


__________________________________$WMc%_________

gaubien2000

thanks $WMc% i will look up devices, thanks Duffer, i tried NPN transistor before, but it got too hot and burn out, but thanks so much.

Chris Savage

Moving from BASIC Stamp Forum to Sandbox Forum.

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Chris Savage
Parallax Engineering