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1Back to top Go down    GEAR INDICATOR - LCD on Wed Sep 27, 2017 2:15 pm

WINGLESS

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Hi Everyone,

'85 K100RS
Managed to get a second hand LCD display module. No marks or "ink bleed", fitted ok all segments working fine but display very faint. Any ideas folks?
thanks
Ian

    

2Back to top Go down    Re: GEAR INDICATOR - LCD on Wed Sep 27, 2017 2:49 pm

charlie99

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perhaps the carbon connection strip (rubbery block between lcd and pc board ) is not conducting quite properly

and needs reseating - cleaning along the conductive edges both top and bottom
isopropyl alcohol on a cotton bud should work and very light touches to the rubbery stuff

and clean the pcboard connections where the conductive blocks make contact

just a suggestion


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

3Back to top Go down    GEAR INDICATOR - UPDATE on Tue Oct 03, 2017 2:30 pm

WINGLESS

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Thanks to charlie99 for suggestions.

Unfortunately cleaning plus alternative "rubber" pads did not improve the situation.

Bit the bullet at the weekend and managed yesterday to convert display from LCD to LED.
Well pleased with result.
I would post a picture but don't know how to join savimg.com which I understand is necessary for forum purposes.

Ian

    

4Back to top Go down    Re: GEAR INDICATOR - LCD on Tue Oct 03, 2017 2:48 pm

Laitch

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WINGLESS wrote:I would post a picture but don't know how to join savimg.com which I understand is necessary for forum purposes.
To post my first image, I simply clicked on the Host an image icon, which is the left-most icon in the upper right group of icons in the toolbar. After that, I just followed instructions like the drone that I am and successfully downloaded an image from my computer. It wasn't nearly as interesting as swapping out an LCD for LSD. Smile


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1995 K75T 60,000 miles
    

5Back to top Go down    Re: GEAR INDICATOR - LCD on Tue Oct 03, 2017 3:19 pm

WINGLESS

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Picture attached ( I hope).
Ian

    

6Back to top Go down    Re: GEAR INDICATOR - LCD on Tue Oct 03, 2017 6:18 pm

MartinW

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Wingless a very interesting conversion. What was involved in doing the conversion, was it a direct replacement? A lot of inmates would be highly interested.
Regards Martin.

    

7Back to top Go down    Re: GEAR INDICATOR - LCD on Tue Oct 03, 2017 7:00 pm

blaKey

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"A lot of inmates would be highly interested."

Yep, a lot!


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Neil
K100RS 1986 RED!
K100RT 1987 (now nekkid with red bits)

Remember Rule No. 6
    

8Back to top Go down    Re: GEAR INDICATOR - LCD on Tue Oct 03, 2017 11:14 pm

RicK G

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MartinW wrote:Wingless a very interesting conversion. What was involved in doing the conversion, was it a direct replacement? A lot of inmates would be highly interested.
Regards Martin.
Oh Martin get with the times they're called "clients" now days. Just as silly but not inmates although it is a better description:lol:
And yes Ian very interested.


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

9Back to top Go down    Re: GEAR INDICATOR - LCD on Wed Oct 04, 2017 4:00 am

MartinW

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Rick I thought inmates would be better than Knutcases, or Fruit Loops.
Regards an apologetic and contrite Martin.

    

10Back to top Go down    Re: GEAR INDICATOR - LCD on Wed Oct 04, 2017 4:36 am

charlie99

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some have done this before

there was a post for the wiring change and the type of led display used ..not so long ago ...

cant find it ...yet

try the search engine ?


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

11Back to top Go down    Re: GEAR INDICATOR - LCD on Wed Oct 04, 2017 4:48 am

RicK G

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MartinW wrote:Rick I thought inmates would be better than Knutcases, or Fruit Loops.
Regards an apologetic and contrite Martin.
Well just so long as the fruit loops are orgasmicly groan


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

12Back to top Go down    Re: GEAR INDICATOR - LCD on Wed Oct 04, 2017 5:11 am

MartinW

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So Fruit Loops it will be.
Regards Martin.

    

13Back to top Go down    Re: GEAR INDICATOR - LCD on Wed Oct 04, 2017 5:17 am

92KK 84WW Olaf

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Anyway on this forum we are different.

We are all Knuts. Klients just don't sound the same even if it's more politiKally Korrect.

But we have a very open door too........anything K is welcome.


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1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 87,100 miles
1997 K1100LT 58,000 miles
    

14Back to top Go down    GEAR INDICATOR - LCD on Wed Oct 04, 2017 10:24 am

WINGLESS

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Hi everyone,
Further to the above, please be advised that the procedure was not my own. 2/3 weeks ago I found an article on this forum detailing the LCD - LED conversion ( I think it was through a link cited in another discussion. I printed off the details for future possible interest, but was mainly concerned at the time replacing like-for-like). This did not work out as noted earlier. I tried again to find the article, "BMW K100, 7 segment gear indicator replacement", but like charlie99 was unable to find it so I worked from the copy I had earlier printed.

So: to this unknown contributor ( UC ) my sincere thanks for your groundwork and design.

Two slight changes I made to UC's design:

1. I used the same digital 7 segment display ( Ebay article no 112039276570 ) that UC advised but I found I was happier with the lesser brightness of 1000 ohm resistors as opposed to the 390's he/she used. This was derived through trial and error using a handful of resistors on a single element of the indicator. No attempt was made at calculating values.

2. I used a cut segment of prototype board only as a drilling guide to ensure the indicator is centralised in the rev-counter window then discarded it. Thereafter I epoxied a 10 pin DIP/DIL socket ( cut from a 20 ) on the component side of the counter pc board and soldered all resistors to this, thus enabling the digital display to be plugged/ un-plugged if replacement was required.

I don't know how the quality would be, but if any interested parties are unable to find this article, I could try scanning my printout and posting it on this forum.

Anyone proposing this change - please use resistors rated 0.6W as larger rated ones at physically too big to fit in the space available.
Also: Great care required removing rev-counter needle. Do not pull or you will pull all of the guts out of the mechanism. I made a small plywood packer straddling the spindle on the back of the RC face and a similar tapered one to slide under the needle hub. re-assembly is just a push fit.

Finally cost: Indicator ex Ebay 1.99 + postage, 7 resistors 0.09 each, DIP/DIL 2.40 both ex Maplin Electronics local depot.
Total approx. 2.70 ( $3.60 USD ) excl postage.

Best wishes
Ian

    

15Back to top Go down    Re: GEAR INDICATOR - LCD on Wed Oct 04, 2017 10:50 am

Avenger GT

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16Back to top Go down    GEAR INDICATOR - LCD on Wed Oct 04, 2017 10:59 am

WINGLESS

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Hi Avenger,

That is the very article.

Many thanks indeed. Still don't know who to thank though for original.

Ian

    

17Back to top Go down    Re: GEAR INDICATOR - LCD on Wed Oct 04, 2017 11:05 am

Avenger GT

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A member called Johnser in Cornwall in U.K.

Link to original post.

http://www.k100-forum.com/t12145-gear-selection-indicator-replacement

    

18Back to top Go down    Re: GEAR INDICATOR - LCD on Wed Oct 04, 2017 11:26 am

charlie99

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cheers guys ,,,thanks for adding to the thread

could well be something our slightly adventurous brothers may attempt


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

19Back to top Go down    Re: GEAR INDICATOR - LCD on Wed Oct 04, 2017 3:25 pm

MartinW

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Thanks Wingless and Avenger I have saved it for the future.
Regards Martin.

    

20Back to top Go down    Re: GEAR INDICATOR - LCD on Wed Oct 04, 2017 8:01 pm

robmack

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Does anyone have a LCD display board from an instrument cluster that they can send / sell to me? I have an idea for a drop-in replacement for the LCD and need the board for mechanical dimensions and electrical testing.


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Robert
1987 K75 @k75retro.blogspot.ca
2011 Moto Guzzi V7 Racer
http://k75retro.blogspot.ca/
    

21Back to top Go down    Re: GEAR INDICATOR - LCD on Wed Oct 04, 2017 9:06 pm

RicK G

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Give me a few days I'll see what I can find in the cave. I need to find what was growling behind a heap of wheels and tyres first Laughing


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

22Back to top Go down    Re: GEAR INDICATOR - LCD on Sat Oct 07, 2017 7:02 am

Laitch

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WINGLESS wrote:
Bit the bullet at the weekend and managed yesterday to convert display from LCD to LED.
Well pleased with result.
To supplement information in links already provided in this thread, here is a video link embedded in this thread at Motobrick.com that also might be of use to those interested in this conversion.


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1995 K75T 60,000 miles
    

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