The circiut you posted is just a 555 timer creating pulses and a 4017 Decade Counter that lights the leds one at a time. Its a pretty basic circuit. It will not do any more then the sequential part of what you want to do.
hi Andy,
It looks a though the components T1 thru T7 are SCR's, so the lights will be a 'bar' display, lighting one LED in sequence.
:
When you hit the brakes, both left and right side will light one LED at a time until all of the SCRs are latched and they will hold steady on until the brake is released and the SCRs can reset.
Is that accurate, Eric?
If so this takes care of what I mentioned earlier about seperating the brake and turn functions.
hi Andy,
That description sounds right to me.
Personally, I like my car braking lights to come on 'full' when I hit the brake.
Even though research 'suggests' that flashing brake lights (giving around 5 flashes before remaining steady) lead to faster reaction times from the driver behind - they are still ilegal here.
just my $0.02
Personally, I like my car braking lights to come on 'full' when I hit the brake.
I dont want the truck driver behind thinking 'is that brake light on or not', leaving to late to brake.
Not quite sure I follow what your saying. You can't PWM a regulator or a 555 timer/4017. You can only use the PWM on the LEDs in this circuit.Now what I've been reading I find that the setup goes like this: pwm -> sharp voltage regulator -> 4017 diagram i posted above. Below is the diagram of the pwm setup used on a similar project.
I assume that the PQ12RF21 on both diagrams are the same. Which means that the power goes through the pwm, the output from the pwm goes to a sharp pq12rf21, then the output from the regulator goes to the 555 timer and the 4017 chip. Is that correct?
I want to use the same setup on both sides to make sure that each side is regulated and safe. Thing is that I don't understand the full point of the voltage regulator. What is its purpose? From what I figure the SCR is what will keep the leds lit when the 4017 goes through its sequence. When the sequence stops it will reset the SCR and all the leds turn off until the sequence passes over each SCR again. Right?
I also do not know what all the small writing is on the schematics. I realize they are resistors and diodes and such but I can't read the whole thing. Can anyone help me out with that?
I need the setup to be like his because it allows him to light all of the leds up. Usually the chip only lights up one led at a time. He has it so the light up one at a time but stay lit. How did he do that? Here is a link to the video so you can see what I mean: YouTube - N14 Pulsar with Seq Turns Daytime video
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