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Old 06-19-2006, 11:35 AM
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Hmm Need Some Ideas in wiring some custom components

OK, I just fabed and installed a new guage pod, after shopping around for a pod I could cut on and make my own I didnt find anything, so I designed my own using styling ideas from the 32" ford pod. I had the design cut out with a friends CAD plasma and added some cut out flames on each side of the speedo and tach, and a set of wings in the top dead center (I'm a helicopter Crew Chief) I put red LED's behind the flames for the turn indicators and a blue LED behind the wings for the brights indicator. What I want to do is when I park the truck at a show, wire in a simple on/off switch to turn all the LED's on to back light the cutouts. Unfortunatly this will produce a backfeed in the system and when the turns or brights are used for their normal use will illuminate the entire indicating system... I'm OK with electrical but no whiz by any means, I believe if I use two relays in parrallel that will open and close the system to where I would be able to do what I want and still have function for the indicators without backfeeding into the larger system....unfortunatly I am not real sure on the wiring for this or if I'm on the right track...

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Old 06-19-2006, 02:17 PM
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What you want to do can be accomplished with some diodes. Diodes are electronics check valves, they allow current to flow only one way. You could install a polarity proper diode in the voltage + wire to each blinker and to the hi beam indicator. Then all you would need to provide is a 12v switched source to the blinker and hi beam indicator before the diodes.

Vince
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Old 06-19-2006, 02:28 PM
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on the right track....thanks,

that said I guess I am now "diode stupid" got any recomendations or would rat shack (radio shack) know what the heck they are talking about?
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Old 06-19-2006, 02:33 PM
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The LED's that you are using are rated at fairly low current requirements (probably in the 10 to 20ma range). Just pick some diodes rated for 12v and you should be OK.

Vince
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Old 06-19-2006, 03:10 PM
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Doc here,

1N4001's Will probably do what you need..about $2 for a pack of 2..

  • The Cathode side to the LED's And The bypass or "Show" power switch
  • The anode side to the headlight power.

If you want to jazz it up a bit..you can install (build) an LED Flasher oscillator, Or a 555 Timer (timer is a bit more involved) To Flash the ONLY THE LED's at a predetermined rate..

(You Can select the "Flash Rate from 1 Hz or 1 flash per second..to MHz millions flashes per second..at that rate is not visible to the human eye) just so long so long as you mount the output side of the flash unit on the Cathode side of the diode.

Parts needed, an LED Flasher oscillator (number escapes me, but Rat Shack has them), A Duel 4 pin dip socket, a Small project box with small pref board, some 22 gauge primary wire, an selection of resistors and electrolytic caps, all this you can get at rat shack for under $26 bucks..

Hook up is simple, Basics are:

power and ground, to the chip, resistor / Cap combo on the null or output, output to the lamp circuit..mount on socket on the perf board, pre-wire it, put board in the project box, run output side to lamps, on/off switch, mount under dash..

If you want to try it post back I'll look up the schematic OR get the chip from RAT Shack..it's on the back of the package..

I think you can also get these pre~built..but I don't remember where..

Doc
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Old 06-19-2006, 09:57 PM
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whoowhee thats what I need!
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Old 06-19-2006, 10:32 PM
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Doc here,

KEWL,

Keep us informed on progress.

Doc
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