<VV> need electronic circuit design help - 3rd brake light

jvhroberts at aol.com jvhroberts at aol.com
Sat Dec 19 13:23:59 EST 2009


 Easy, in fact, super easy. Although running a wire is actually the simplest. I gather the LED you've chosen has the proper resistor to run on 12v? 

Take two diodes, something from the 1N400x family (Radio Shack has these) and attach one to each brake light, with the end with the silver band going toward your third brake light. Done! 

Also, your third brake light will blink whenever one of the turn signals are on, but the brakes are off. 

 

John Roberts
 

 

-----Original Message-----
From: Dave Thompson <dave.thompson at verizon.net>
To: virtualvairs at corvair.org
Sent: Fri, Dec 18, 2009 10:55 pm
Subject: <VV> need electronic circuit design help - 3rd brake light


I am working on a project that is beyond my meager electronic component
level knowledge. If there is someone out there that is willing to help me,
please contact me off line.

 

Project:  

3rd brake light on early Spyder

 

Idea: 

Grind out the red portion of the Spyder emblem on the rear center engine
cover. Install LED's and a red lens. 

I have a sample made from an old rusty emblem. The LED's work fine with
12volts and it looks good.

 

Problem: 

Combine the left and right brake\turn light circuits into one circuit
without having to run a wire from the brake light switch to the rear of the
car. Seems to me that would be a very simple circuit. However, it is beyond
my design skills without using a bunch of relays.

 

Once I get a working circuit, I will temporarily install it and then decide
if it looks good or if it is "too tricky". If I like it, I will make another
one using a new emblem.

 

I will take pictures and write an article for publication in our chapter's
newsletter and make it available to those who what it.

 

Dave Thompson

63 Spyder vert 

 

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