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Part 41: LED Tail Light Conversion, Part 1 - My 76 Mazda RX-5 Cosmo Restoration

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Published on Oct 30, 2015

Surprise! Part 41 of my 76 Mazda Cosmo restoration is here! Part 41 is the first in a two part episode covering the conversion of the unique Cosmo tail lights from outdated incandescent light bulbs to modern LEDs. I decided to pattern my tail lights after those of the 2012 Dodge Charger, creating an outline of large LEDs, and filling the rest of the lights with small LEDs. I know it's been a while since my last episode, mainly because I've been sharing my Cosmo time with the time spent working on my new house, setting up the new shop, getting my RX-7 back on the road, oh and those little things like job, food and sleep. So I chose the tail light project because it was something I could work an hour here and there on, without requiring a fully functional shop. So here, I cover deciding on the LEDs, designing the control circuit based on an Arduino ATTINY85, and then beginning the actual LED'ding of the tail lights starting with the reverse lights. Circuit boards are designed, etched and assembled, then the new LED illumination added to the reverse lights. In the 2nd half of this episode, we'll cover the brake and turn signal lights, building the controller and integrating it all together into a spectacular assembly.

Circuit schematics, source code and PCB designs in this episode can be found at:
http://www.aaroncake.net/76cosmo/tail...

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