Mine looks just like the OP. I need to finally get a round tuit.
I'm wondering about the sequential mod. Since the panel appears a little brighter at the bottom where the LED strip is, would sequencing them really look that good? It seems to me that it might advertise the fact that panel diffusion (scattering, distribution, whatever you want to call it) isn't perfect.
Of course, this mod is obviously only for turn signals (and maybe hazards), since there can't be any delay in brake light activation, for safety and legal reasons.
Now, if you want to pulse the entire panel upon breaking, that's doable, too, but I think this would be more appropriate for the 3rd brake light.
As far as turn signals, how many steps should there be? Should all 20 chase independently, or use banks of 4 or 5 what?
The chaser components are dirt cheap, so I guess it's worth playing around with.
My first thought is to use a 4017 decade counter (or two) with a 555 and pot for adjustable speed. That's if you want a linear step effect. It could be ramped (non-linear) easily enough.
An alternative for a ramp (i.e., speed increases towards the outboard brake light), an LM3914 could be driven with a simple sawtooth generator. Since it's a dot/bar driver, the user could select between stepped or solid bar (i.e., all previous LED's remain lit).
For a more fluid effect, a simple analog circuit using different value caps could be used, with separate driver branch for each LED.
If it's desirable to illuminate the outside brake light last during a turn signal operation (i.e., after the LED panel does its thing), that's trickier if the brake is to be kept OEM incandescent, since we're talking about mixing relatively low current and higher current circuits. A simple xistor switch should do. If need be, a solid state relay could be triggered to switch on the bulb. I forget the wattage rating of the OEM brake bulb. Is it a 3157?
For a super fancy panel that gives different, user-configurable effects for brake, turn, hazard, and maybe even reverse, a cheap PIC could be programmed to do everything above and more.
There are many ways to achieve various chaser effects.
Last edited by Torque; 01-15-2017 at 10:00 AM.