zeke's Monza

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Re: zeke's Monza

Postby zeke » Tue Jan 09, 2018 8:00 am

spencerforhire wrote:Now if you do the same thing to the hatch keyhole cover, you could use it as a 3rd brake light....


I am planning to do the rear one as well but it isn't near bright enough to see in the daylight. Will be just accent lighting hooked to the marker circuit.
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1979 Chevrolet Monza 2+2


Re: zeke's Monza

Postby spencerforhire » Tue Jan 09, 2018 4:11 pm

I was sort of kidding, but I'm sure it will look cool just on the tail light circuit. Obviously, that single LED wouldn't really be bright enough for CHMSL(that's how it's referred to in GM wiring diagrams).
The "fleet"-
77 Vega Estate wagon- project(someday)will have TPI305/T-5, S-10 spindles/axles
72 Vega HB Drag Car -383/'Glide/9"(9.35@146.19)(5.94@117.28 1/8th)
76 Vega GT- 400/4spd/9" retired from active duty(rusty)
03 Silverado 2WD ex.cab (work truck/parts hauler)
04 Silverado 2WD ex.cab (retired)
06 Haulin' 20ft enclosed car transporter
93 Suburban- 350/4L60(retired)
00 Saturn SW2- wife's car
01 Saturn SC2- younger son's project
00 Saturn SL2- daughter's car
98 Saturn SW2- spare
and 3 more Saturn "parts cars"
Note- the very act of listing all of these has made me realize I have some kind of problem.....

Visit http://www.spencerforhire.ca
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Re: zeke's Monza

Postby zeke » Wed Jan 10, 2018 6:25 pm

I'll take a guess, Center High Mounted Stop Lamp

The LED chip is rated for 260 mA but at that current level, the plastic emblem would get damaged - way too hot. I experimented with different values for R1 and ended up with 68 ohms. Best compromise between luminosity and heat. R1 needs to be a 5 watt ceramic power resistor. All testing was done at 14.2 volts with peaks of 15v as this is where most GM alternators have there control voltage set to.

I ground a trough for the wires and epoxied them down. Bits of heat shrink tubing were used, a 2 pin molex connector and everything was soldered. Got to sand the epoxy flat on the emblem backside yet, drill a hole in the fascia, emblem mount area, for the connector to pass thru and wire in the connector to the marker circuit.

Resistor: https://www.digikey.com/products/en?key ... 5JB68R0-ND
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zeke
 
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1979 Chevrolet Monza 2+2

Re: zeke's Monza

Postby waybad » Thu Jan 11, 2018 7:13 pm

AWESOME!!!
Tinker
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Re: zeke's Monza

Postby zeke » Thu Jan 11, 2018 10:47 pm

Thanks Waybad!

Finished up the LED front emblem mod install tonight. Short video clip here: https://www.youtube.com/watch?v=a2NOErq9Juw

:dance:
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1979 Chevrolet Monza 2+2

Re: zeke's Monza

Postby vegastre » Fri Jan 12, 2018 11:25 am

Wow!
I concur, that is awesome. I may copy the idea :th: :th:
Phil Kennedy~
72 Chevrolet Vega GT Hatchback
75 Pontiac Astre SJ Safari Wagon
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