LED Sequential Turn Signals
Printed From: the12volt.comForum Name: Lights, Neon, LEDs, HIDs
Forum Discription: Under Car Lighting, Strobe Lights, Fog Lights, Headlights, HIDs, DRL, Tail Lights, Brake Lights, Dashboard Lights, WigWag, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=148409
Printed Date: September 07, 2025 at 3:27 PM
Topic: LED Sequential Turn Signals
Posted By: warbird52
Subject: LED Sequential Turn Signals
Date Posted: August 30, 2025 at 1:59 PM
Hello all,
It has taken me a while to to get here but here goes. Hope this works as I often have mixed results posting on forums...
I have installed a set of 3 LED turn signals in both front fenders of my Jeep. Initally I was using a cheap aftermaket sequencer to run them but it failed after about 6 months (as always you get what you pay for). In researching a fix I came up with two posibilies; one 555/4017 IC based, one Transistor based. BTW - I used a relay diagram from here to even out the pulsed signal input.
NOTE: The pics I've attached are not curcuit diagrams, but pcb layouts. Experience has tought me they are NOT the same thing! I'm working inside a 3"x 4" project box that already has a mounting place (with wiring run to it), so space is limited to that. Two of the PCB's I've depcited fit nicely (1 for Lt, 1 for Rt). They are not to scale but the relationship between components is reasonably accurate. In case you're interested, these, like almost allmost all my wire diagrams, were done in PowerPoint. It's a kind of hobby. I see them as puzzles. I even did my lawn tractor once...
Basically I'd like some input on whether either or both will work (with or w/o modifications?) I'm not into the math and I had some difficuly finding different diagrams that used the same components (for confirmation). Any direction on specs, P/N's, etc., would be greatly appreciated!
Once I have my final board design l'll post the full lighting diagram.
Thx
-------------
Joel
It has taken me a while to to get here but here goes. Hope this works as I often have mixed results posting on forums...
I have installed a set of 3 LED turn signals in both front fenders of my Jeep. Initally I was using a cheap aftermaket sequencer to run them but it failed after about 6 months (as always you get what you pay for). In researching a fix I came up with two posibilies; one 555/4017 IC based, one Transistor based. BTW - I used a relay diagram from here to even out the pulsed signal input.
NOTE: The pics I've attached are not curcuit diagrams, but pcb layouts. Experience has tought me they are NOT the same thing! I'm working inside a 3"x 4" project box that already has a mounting place (with wiring run to it), so space is limited to that. Two of the PCB's I've depcited fit nicely (1 for Lt, 1 for Rt). They are not to scale but the relationship between components is reasonably accurate. In case you're interested, these, like almost allmost all my wire diagrams, were done in PowerPoint. It's a kind of hobby. I see them as puzzles. I even did my lawn tractor once...
Basically I'd like some input on whether either or both will work (with or w/o modifications?) I'm not into the math and I had some difficuly finding different diagrams that used the same components (for confirmation). Any direction on specs, P/N's, etc., would be greatly appreciated!
Once I have my final board design l'll post the full lighting diagram.
Thx
-------------
Joel
Replies:
Posted By: warbird52
Date Posted: August 31, 2025 at 3:33 PM
Posted By: warbird52
Date Posted: August 31, 2025 at 6:54 PM
Posted By: warbird52
Date Posted: September 02, 2025 at 9:15 AM
OK, last ask. The lack of a even a single conmment is very discouraging...
I cleaned up my diagram and removed the PCB graphic. Hopefully is is easier to read. Ive studied 555/4017 diagrams till my eyes are crossed. This SHOULD work but it doesn't!
BTW - Both chips are rated up to 15V
Thx,
-------------
Joel
I cleaned up my diagram and removed the PCB graphic. Hopefully is is easier to read. Ive studied 555/4017 diagrams till my eyes are crossed. This SHOULD work but it doesn't!
BTW - Both chips are rated up to 15V
Thx,
-------------
Joel