DIY Taillight sequencers for $5-$6
I've recently started making and selling my own splice-in sequencers. The ones I personally make are on proper fabricated circuit boards and have an auto-calibration feature (no pun intended) for any speed of flasher. These however cost $12 and REQUIRE A PIC PROGRAMMER (around $80 if you don't have one) as well as some more detailed electronics knowledge.
FOR EVERYONE ELSE: Since I got a whole lot of interest at my local Mustang club selling these, it occurred to me that maybe people on here might like super-cheap sequencers too. I have designed a splice-in sequencer circuit that would cost around $5-$7 to make and requires nothing but a bit of soldering to build (and maybe a little math to find the right resistor value to match the speed of your flasher). Is there any interest in this? I have no problem doing up the schematics and maybe even a picture tutorial, but I won't bother if there's no interest. |
That sound cool!!! go for it :tup
I think it would be appreciate from many of us.. |
I figure I probably will. It wouldn't take much to do. However this "easy" version is a concept at the moment. I'm waiting on a few parts from ebay (probably a couple of weeks) to make 100% sure it works, and then I can take pictures of assembly also.
I also forgot, add about $3 to the price I said before, you have to get a part off ebay to be able to add a Major wire to your two inner brake lights. I'll post when I have 100% confirmed the design and have a tutorial done. :cheers: |
Interesting!
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Is the time for the sequence determined by the R/C time constant?
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To make math simple and to avoid one thing I'm concerned may or may not be a problem, I'll be using a pair of 555 timers. A quick google for "555 timer calculator" should bring up plenty of web apps that make it easy to find the resistor value you'd need (you probably only have to change 1 resistor from whatever I decide on for the stock one to get a custom speed).
The two 555s will feed into a CD4001 which will act as a pair of latches, and those will drive an IRF9540 Mosfet to switch the actual lights. Pricing thus being approximately: 555 x4 = $1 CD4001 x 2 = $1 IRF9540 x 4 = ~$5 Pins to upgrade the minor/ground "inner" taillight to have major/minor/ground = ~$3 I'll post more, including ebay links for all the parts, once I'm done testing this to make sure I haven't overlooked anything! |
VERY interesting. I'm looking forward to following this.
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Just a quick update that rather upset me the other day: Mustangs made in November '05 or after have a type of taillight socket that can't easily be upgraded to have a third wire for Major. These people will have to get a taillight harness (only one would be necessary) from a local scrap yard and simply replace the third taillight instead of adding a wire to it. Since each side of a wiring harness has 2 fully wired sockets, you will only need 1 side to get both sockets.
Cheers |
Used the 555 Timer lots when I was in college (many years ago). Major problem is that the stock flasher( which can be modified) ultimatly determines the time that the sequencer can operate in.
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Yes, this is why I'll try to post values for a stock flasher and suggestions for modified ones. If you see here it's not hard to modify a flasher though. I personally have an 8.6uF cap for mine (just a 6.8, with the original one removed) and I love its speed. But this is why I opted to make the sequencers I sell self-calibrating to your flasher speed :)
It's possible to have a slow sequence taillight and normal flasher speed, but again it would involve a more advanced circuit (like the ones I personally make) as well as an always-live line run from the battery. |
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