scanning leds?

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=95114
Printed Date: May 10, 2025 at 10:35 PM

Topic: scanning leds?

Posted By: slawson2000
Subject: scanning leds?
Date Posted: June 25, 2007 at 6:22 PM

Well I am in the middle of an install and thought of something and figured someone here would know. The previous owner of my truck had about 5 holes (per door panel) for LED lights / indicators / something. They were just holes when I got it. Anyway, my viper esp150 puts out a intermittant signal to light a LED. I was wondering if there was a gizmo out there so I could put in a series of LED's and have the fire off in a knight rider fashion.

Got to do something with the holes. Any ideas?

Replies:

Posted By: JWorm
Date Posted: June 25, 2007 at 8:23 PM

https://www.autotechs.com/items/item490.htm

No longer available there...but maybe you can find one somewhere.

Posted By: slawson2000
Date Posted: June 26, 2007 at 8:49 AM

Thank you. Next question. Since LED's do not require that much powe, could I run two LED's of each node so I could have the LED's in sync?

Posted By: slawson2000
Date Posted: June 26, 2007 at 8:57 AM

Would anyone have the specs / install sheet on these?

Posted By: slawson2000
Date Posted: June 27, 2007 at 3:55 PM

Well I found 2 and bought them. If I hook them up the same will each series blink in sync with each other?

Posted By: slawson2000
Date Posted: July 01, 2007 at 9:48 PM

Would anyone have the specs / install sheet on these?

If I hook them up the same will each series blink in sync with each other?

Posted By: slawson2000
Date Posted: July 01, 2007 at 9:52 PM

These would be the DEI 629R.

Thanks

Posted By: JWorm
Date Posted: July 02, 2007 at 8:46 AM

slawson2000 wrote:

If I hook them up the same will each series blink in sync with each other?

Probably

Posted By: slawson2000
Date Posted: July 02, 2007 at 9:52 AM

Well, originally I was going to just hook up another set of LEDs in parallel and have it all run off one unit guaranteeing that they would flash in sync. But I talked to DEI and they said that one unit does not put out enough power to drive 2 LEDs at the same time; so I bought two hoping they will sync.

I guess I will find out...

Posted By: slawson2000
Date Posted: July 05, 2007 at 7:34 PM

Well so much for that idea. I guess DEI was wrong. I have two DEI 629R's hooked up and they scan at different speeds - I was hoping to get them in sync.

I would think this is possible. Anyone have any other ideas?

Posted By: dualsport
Date Posted: July 06, 2007 at 12:39 AM

If you were just looking to flash multiple LEDs in unison rather than in sequential Knight Rider fashion you could add a simple current mirror drive circuit.

Posted By: slawson2000
Date Posted: July 06, 2007 at 8:03 AM

Maybe I am not being clear. I have two sets of five LEDs, one set on each 629R. Each set flashes in a knight rider (or other) sequence. I want the two sets o lights to be in sequence; so that the 1st LED of set 1 flashes in sync with the 1st LED of set 2, and so on.

BTW, what is a simple current mirror drive circuit?

Posted By: slawson2000
Date Posted: July 06, 2007 at 4:58 PM

Well, DEI was wrong, you can wire two LEDs in parallel and it will fire (bright enough). So that is the direction I am headed. We'll see it if lasts.

Ever get the idea that you are posting replies to yourself?

Case closed (for now).

Posted By: dualsport
Date Posted: July 06, 2007 at 7:36 PM

It's a circuit you can use to drive multiple LEDs from one output with matched brightness.

Current mirror circuit

Posted By: slawson2000
Date Posted: July 07, 2007 at 12:38 PM

Got it .... Thanks.