Prostheta Posted January 5, 2005 Share Posted January 5, 2005 The project idea is to create a functional yet "different" brake lighting effect to be mounted in the rear spoiler of a MK5b/6/7 Escort. Plus two bottle of red wine. The proposition is to mount a row of 12 LEDs in the rear spoiler of my MK5b Escort and to add an animated "sweep" effect to the illumination/deluminate. To explain the effect i'm aiming for, consider a row of twelve LEDs arranged as so: The aim is for the central pair of lights to light up, and move out from the centre to the edge in sequence over the space of say, half a second like so: ...and when the brake lights extinguish, the lights to go out from the centre like so: The circuit i've designed to achieve this uses a simple RC and Schmitt trigger circuit to sequentially illuminate the LEDs from the centre outwards and the reverse.... Yeah yeah yeah, so two bottles of red wine don't help my diagram stuff much, but hey. Right, so what we have here is the LED array (notice the LEDs are grouped into pairs) and a cascade of RC/Schmitt triggers. The trigger feed from the brake light (Vbl) causes the first RC network to start charging using some good old 0.69RCms goodness. When the network achieves the triggering voltage for the Schmitt trigger, the first LED pair light up and the next RC/Schmitt pair starts charging up (on and on). Similarly, when the brake light feed voltage is removed, the RC/Schmitt combinations discharge and the LEDs extinguish from the centre outwards. Right, geeksh1t over. The problem herein lies in the spoiler itself. It's not easy mounting LEDs in the spoiler without the work showing. What i'm aiming to do with this project is to build the circuitry on breadboard, and test it from there before committing to mounting it into the boot frame. Secondly, the invasive Dremel work required to the spoiler is pretty damaging for the cosmetics. All the work from start to finish will be photographed and documented in this thread. Hell, I wouldn't know how to make my car go much faster, but I sure can make some wacky electronic sh1t ;-) To be continued. Very slowly because i'm kind of lazy. PS. Sorry about the crappy diagram. My reference only. Link to comment Share on other sites More sharing options...
Mk6 Si Ross Posted January 5, 2005 Share Posted January 5, 2005 well over my head matey!!!! nice one for having a bash at it My brother would understand all this, but me.........na!!! Link to comment Share on other sites More sharing options...
Prostheta Posted January 5, 2005 Author Share Posted January 5, 2005 I'll post more as I get along with it, but I get distracted by most things. Not having my spoiler on at the moment is incentive enough. Link to comment Share on other sites More sharing options...
neil Posted January 5, 2005 Share Posted January 5, 2005 (edited) Just nod and say yes I get most of it will be good, no reason why that shouldnt work. Edited January 5, 2005 by neil Link to comment Share on other sites More sharing options...
Mk6 Si Ross Posted January 5, 2005 Share Posted January 5, 2005 Just nod and say yes I get most of it will be good, no reason why that shouldnt work. <{POST_SNAPBACK}> i think that would look better if it filled like it does now but then went off all at once maybe??? then repeats Link to comment Share on other sites More sharing options...
neil Posted January 5, 2005 Share Posted January 5, 2005 Link to comment Share on other sites More sharing options...
Mk6 Si Ross Posted January 5, 2005 Share Posted January 5, 2005 <{POST_SNAPBACK}> dunno if its the speed of the gif but the middle 2 or 3 are permanently on Link to comment Share on other sites More sharing options...
neil Posted January 5, 2005 Share Posted January 5, 2005 Whoops good spot there Link to comment Share on other sites More sharing options...
Mk6 Si Ross Posted January 5, 2005 Share Posted January 5, 2005 Whoops good spot there <{POST_SNAPBACK}> better still think its not 'off' for long enough Link to comment Share on other sites More sharing options...
neil Posted January 5, 2005 Share Posted January 5, 2005 Its starting to hurt my eyes Link to comment Share on other sites More sharing options...
Prostheta Posted January 5, 2005 Author Share Posted January 5, 2005 The LED animation is intended to be more of a transitional thing, so the LEDs illuminate from the centre outwards and stay constant until the brake is released in which case they extinguish from the centre. Modifying the design to include a small logic function could make the lights cycle continuously like that...not sure what would happen if you tapped the brake light on and off mid-cycle though...i'll ponder on this today... Link to comment Share on other sites More sharing options...
andrewg1323 Posted January 6, 2005 Share Posted January 6, 2005 Why not make it run off something like a 6F84 that way you could reprogram it and change the layout every time you were bored Link to comment Share on other sites More sharing options...
Prostheta Posted January 6, 2005 Author Share Posted January 6, 2005 Considered that....*will do menial work for a PIC programmer* Link to comment Share on other sites More sharing options...
andrewg1323 Posted January 6, 2005 Share Posted January 6, 2005 lol my PICs terribly rusty, gotta write something myself to turn a voltage feed into a LED bar output for a rev ounter and shift light type thing! Link to comment Share on other sites More sharing options...
Blimey Posted January 7, 2005 Share Posted January 7, 2005 Awwwwww i thought it was gonna be like the first post, 12x6 with a animated arrow lighting up Link to comment Share on other sites More sharing options...
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