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PWM dimmer for instrument backlighting after upgrading to LEDs

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PWM dimmer for instrument backlighting after upgrading to LEDs

 
Old 10-06-2011, 11:06 PM
  #31  
928Myles
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Ed,
appreciate all the work. Interest lodged.

Myles
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Old 10-07-2011, 04:25 AM
  #32  
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I'd definitely be interested in a kit or compleed unit.

Tom D.
'93 GTS, 5 speed, Amazon Green
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Old 10-07-2011, 06:38 AM
  #33  
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Default Great job ED!!

+1 I would have to do the LED conversion at the same time
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Old 10-07-2011, 07:15 AM
  #34  
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+1, Ed. Definitely interested. I've got to pull my pod soon anyway; what a great time to upgrade. / Bruce
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Old 10-07-2011, 02:11 PM
  #35  
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+1 Ed, nice work and thanks for keeping this community informed about this as you have been doing!

I'm interested in either a build-it-yourself kit or a completely assembled ready-to-install item, either way will be fine with me. Any rough idea on when, and where do I send my money too? :-)
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Old 10-07-2011, 02:18 PM
  #36  
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OK, it looks like there's enough interest that I'll go ahead and come up with something. Give me a few days to settle on a slightly newer design and get more parts on hand and see what I can come up with.

I'll post updates here.
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Old 11-10-2011, 02:37 PM
  #37  
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Ed, Thanks for all of the work you've done to figure out the LED conversion process, document it so thoroughly, and develop a dimmer along the way. Please count me in for a dimmer as well. I'm going to start ordering the LEDs and related stuff this week. Your excellent how-to PDF notwithstanding, I apologize in advance for all of the stupid questions I will send you as I tackle this upgrade.
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Old 11-10-2011, 03:13 PM
  #38  
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What do you use for a user interface (****)?
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Old 11-10-2011, 03:24 PM
  #39  
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Ed, Please put me down for one of those dimmers. TIA. 77Tony
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Old 11-10-2011, 03:43 PM
  #40  
Ed Scherer
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Originally Posted by GMM928 View Post
Ed, Thanks for all of the work you've done to figure out the LED conversion process, document it so thoroughly, and develop a dimmer along the way. Please count me in for a dimmer as well. I'm going to start ordering the LEDs and related stuff this week. Your excellent how-to PDF notwithstanding, I apologize in advance for all of the stupid questions I will send you as I tackle this upgrade.
It was generally an enjoyable project. I'm continuing to work on the interior LED upgrades write-up, too. Since it's not yet complete, you can provide any input on that, too; I might be influenced which remaining sections to complete next (I was planning on doing the pod switch backlighting next).

Originally Posted by heinrich View Post
What do you use for a user interface (****)?
Original rheostat... that was actually one of the main challenges, as it's not a very suitable resistance range.

The PWM dimmer module has five terminals... two go to the original rheostat, two go to the wires that originally went to the rheostat, and then one new wire to ground.

Originally Posted by 77tony View Post
Ed, Please put me down for one of those dimmers. TIA. 77Tony
Noted.


I believe I have enough parts on hand (with the exception of enclosures and PC boards) for an initial batch of ten units. I'm in the process of switching to different PCB layout software, so you'll have to wait a little longer.

I haven't forgotten about this project... I just have very limited time to work on it.
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Old 11-10-2011, 04:10 PM
  #41  
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In for two dimmers, if that's not too gluttonous....
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Old 11-10-2011, 06:52 PM
  #42  
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Please put me in for one also,Ray
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Old 11-11-2011, 09:32 PM
  #43  
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Ed, I think your idea of writing up the pod switch conversion instructions before the center console is a good one (would be ideal to do pod switches at the same time as the instrument cluster). The dimmer install instructions are obviously not necessary until you have the units ready to ship. I ordered all of the LEDs today (took about 10 minutes, just followed your buyer's guide list); I think this will be a great Thanksgiving weekend upgrade project. I can't imagine how I could screw this up given how good your write-up is (but I will probably manage to do so somehow). Will keep you posted, and thanks again.
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Old 11-11-2011, 09:47 PM
  #44  
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One other thought (mentioned to you before). A few months ago, I attended a GTG with other local owners hosted by Kitty and Gary Knox. While there, I met Glen McCartney. Gary had installed EL (electroluminescent) strips under his door sills to highlight the 928 mark. It looked great, and it went very well with some of the LED conversions he had already done to his interior lighting. It would be great to somehow add a link to this thread for people who might want to consider that upgrade as well. If I remember correctly, Glen told me that he purchased the strips from Roger @ 928sRUs.

I plan to give a Roger a call on these and add them to my lighting upgrade project...
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Old 11-11-2011, 09:48 PM
  #45  
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...meant Glen had installed...
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