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Looking for LED help.... Answered

Hi there,

I'm looking for for help with a project I'm working on and I'm tryin g to build a *fairly* simple LED bar light (similar to that which you see on an F1 steering wheel or a car Tachometer) for a gaming wheel.   Although I've done a lot of gooling and searched this forum I'm not sure where to start.

My aim is to have around 15 LEDs in a row (5 green, 5 red and 5 blue) that light up one by one (and remaining on) from the left to right. Its purely cosmetic and not conntected to anything.  Ideally I'd want this to repeat 3 times on the when first powered then remain off until power is cut then restored.

Here's a link to something similar that I'm trying to achieve and picture embedded too

I'm sure this must be realtively simple to do but I'm lost where to start.  Any help or simple to follow tutorials would be great.


5 Replies

steveastrouk (author)2011-07-22

I'm going to be very cheeky and post a link to a circuit diagram from ICeng

Change the chip that he connects to the LEDs to a CD4017 instead./

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Hazza24 (author)steveastrouk2011-07-23

The link is returning a 404! Were you linking to ICeng's UFO diagram?

Thanks for the help too!!

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steveastrouk (author)Hazza242011-07-23

Hmm, sorry about that.

Just try "ICeng lighthouse" in the search box, A.only posted it a couple of weeks back.

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ooda55 (author)2011-07-22

You could do it with 10 LED's using a "Decade Counter" (Scrolls through 10 output pins, one at a time accourding to an input clock signal) Then use a 555 Timer IC to generate the clock signal, as far as getting it to only run 3 times goes, it may not be as simple (unless you use another 555 to only turn the circuit on for a set ammount of time)
There is some great electronics simulation software called "Crocodile Technology" that allows you to test circuits, and play with their examples (which include decade counters and 555's)

Good luck!

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caitlinsdad (author)2011-07-22

Read up on this https://www.instructables.com/id/Yet-Another-Daft-Punk-Coffee-TableDisplay/.

There are probably better ways but you essentially only need to fire up your 15 leds in sequence laid out in one row but still wired up in that matrix.  It would be a way to delve into the arduino world.  Good luck.

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