[CLOSED] TTSH LED Resistor Replacement PCB's

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Level5
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Post by Level5 » Wed Aug 20, 2014 8:35 am

Board arrived tody, Thank You!

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zeta
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Post by zeta » Wed Aug 20, 2014 8:43 am

mine yesterday, thanks as well!
Racks'NTracks ig.welt_am_draht

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qp
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Post by qp » Thu Aug 21, 2014 3:01 pm

Here's a rar with all photos of all of the placements. You can see the polarity in each photo. You'll notice the boards are different. I messed up with the hole spacing and the first set didn't line up. The new ones are dead on and smaller.

Remember, any section that has 4 LED's doesn't need a board, just a through hole resistor of the same value as the ones on the boards.

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elmegil
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Post by elmegil » Thu Aug 21, 2014 3:27 pm

Thanks man!

Edit: So is the sample & hold one inside that shrink tubing? Why did you run it all the way over to the next module?

I'm still digging through the old messages in the build thread to make a list of mods I need to be sure I make or things to watch out for (like order of caps vs heat sinks for the amps).

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qp
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Post by qp » Thu Aug 21, 2014 4:06 pm

elmegil wrote:
Edit: So is the sample & hold one inside that shrink tubing? Why did you run it all the way over to the next module?
Guess that one is a bit hard to see. It's just below the op amp (TL072). The stuff in the shrink tube is a norcore mod that was to get rid of the Rate bleed, which is why its a 072.

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elmegil
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Post by elmegil » Thu Aug 21, 2014 4:25 pm

Cool, I see now. That's a transistor with a resistor on it, and the LEDs are right where you say :)

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elmegil
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Post by elmegil » Mon Aug 25, 2014 7:47 pm

One more question; in the original discussion of this, one chain of 5 LEDs was divided by cutting a trace. Is that still necessary?

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Post by Nordcore » Mon Aug 25, 2014 8:03 pm

elmegil wrote:One more question; in the original discussion of this, one chain of 5 LEDs was divided by cutting a trace. Is that still necessary?
Yes. The 5 LED row must be split to get all 4-length rows.
The split is done in a way that it modifies a 5 and a 3 LED row to two 4 LED rows, so the modified rows need no LED board.

(If you had kept that 5-LED row all (seventeen) other rows would have needed one LED more. Plus the remaining voltage across the current limiting resistor would have gone done from 4V (at max. brightness) to 1.8V, making the current adjustment more critical and the dimmer setting less smooth. )

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qp
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Post by qp » Mon Aug 25, 2014 8:04 pm

elmegil wrote:One more question; in the original discussion of this, one chain of 5 LEDs was divided by cutting a trace. Is that still necessary?
Yep and yep.

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elmegil
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Post by elmegil » Mon Aug 25, 2014 10:54 pm

Thank you both. Let's see if I can get this done before midnight :)

eveready9v
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Post by eveready9v » Wed Oct 29, 2014 11:04 pm

Any chance there are any more of these available? Thanks Barry

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krok
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Post by krok » Thu Oct 30, 2014 1:18 pm

eveready9v wrote:Any chance there are any more of these available? Thanks Barry
I have one I'm not going to need. I got it in preparation for the next TTSH run, but it looks like the next run fixes the LED dimming issue.

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Post by eveready9v » Fri Oct 31, 2014 10:04 am

krok wrote:
eveready9v wrote:Any chance there are any more of these available? Thanks Barry
I have one I'm not going to need. I got it in preparation for the next TTSH run, but it looks like the next run fixes the LED dimming issue.
Love to buy it off you if possible, Paypal? How do you want to proceed? Thanks again, was worried i missed out on this! Barry

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krok
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Post by krok » Fri Oct 31, 2014 10:15 am

eveready9v wrote: Love to buy it off you if possible, Paypal? How do you want to proceed? Thanks again, was worried i missed out on this! Barry

I'll PM you. Glad someone will be able to use it still. Thanks!

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qp
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Post by qp » Fri Oct 31, 2014 11:43 am

FYI, I found 1 more board at the bottom of a bin so if anyone still needs one send me a message.

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Post by mandzaro » Fri Oct 31, 2014 5:51 pm

That’s unclear for me:

Should all that resistorts (R470,R560,R680,R390) remain on PCB and the replacement boards are additional solder to them from components site (for R390 one R220 resistor) - or should be throw away and only replacement board alone ( or R220) must be solder ?

Thanks for help

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elmegil
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Post by elmegil » Fri Oct 31, 2014 7:02 pm

The LED boards replace the resistors entirely.

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qp
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Post by qp » Fri Oct 31, 2014 10:14 pm

mandzaro wrote:That’s unclear for me:

Should all that resistorts (R470,R560,R680,R390) remain on PCB and the replacement boards are additional solder to them from components site (for R390 one R220 resistor) - or should be throw away and only replacement board alone ( or R220) must be solder ?

Thanks for help
Yep, like elmegil said, all of the resistors are removed from the TTSH PCB and replaced with these PCB's. There are a couple resistors that do stay on the TTSH, but their values will need to be changed to match the values used on the PCB. So, if you used 220 ohm resistors on all of the replacement PCB's, all resistors on the TTSH with the value 390 ohms will be replaced with 220 ohm.

Most important is the number of LED's added to each resistor location. The R470's get 1 LED, R560's get 2 LED's & R680 gets 3 LED's.

mandzaro
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Post by mandzaro » Sat Nov 01, 2014 5:36 am

Thank you very much

eveready9v
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Does any one have a photo of these pcb's in action?

Post by eveready9v » Thu Nov 06, 2014 4:56 pm

Just trying to get my head around how these get attached to the main board. Thanks Barry

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elmegil
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Post by elmegil » Thu Nov 06, 2014 5:30 pm

I took lead cut-offs and soldered them into the holes on each end, then soldered them into the PCB and cut them off as if they were resistor leads.

I can't say if that's the official answer or not :)

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qp
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Post by qp » Fri Nov 07, 2014 10:29 am

elmegil wrote:I took lead cut-offs and soldered them into the holes on each end, then soldered them into the PCB and cut them off as if they were resistor leads.

I can't say if that's the official answer or not :)
What he said. :tu: or feed the cutoffs through and bend them to hold the PCB's in place and solder. Either way will work just dandy

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Pics??

Post by eveready9v » Sun Nov 09, 2014 8:33 am

Does anyone have any pics of this mod, as I'm a little confused on where these led pcb's are subbing out the resistors? is it the resistors on the front of the main board? thanks barry

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qp
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Re: Pics??

Post by qp » Sun Nov 09, 2014 2:16 pm

eveready9v wrote:Does anyone have any pics of this mod, as I'm a little confused on where these led pcb's are subbing out the resistors? is it the resistors on the front of the main board? thanks barry
Here are photos of mine. Note the polarity of each.

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Post by LED-man » Mon Nov 10, 2014 8:12 am

all TTSH Builder for the new TTSH release (late 2014) need this Info:

only the first TTSH (sold December - delivered until May 2014) needs this LED Modification.
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TTSH Support Page and other DIY Projects:
https://www.DSL-man.de

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