308 Speedo Repair/Rebuild

Hello Adrian, follow your posts here in Brazil.I would like to acquire a circuit or schematic Speedo 308 GTB. Please contact [email protected]

 

Hello Adrian,
Are these ready for sale now? I've been watching and waiting, but thought you were still putting the finishing touches on the design and software... my 328 is still begging for a fix!

Please let us know when we can buy the fruits of your long labor... and how to order, etc.

Thanks!

 

Thanks for answering Adrian, you have an e-mail to contact? I am an electronics engineer and work with vehicle instrumentation restoration from 1920 to 1980 in Brazil. I wonder if you can send or sell the schematic for the card you rode. The board my client is shorted.

 

Did you ever decide if you were going to implement a Bluetooth connection for different tire sizes?

 

Hello Adrian, today managed to make the speedometer and odometer work with PIC. I had a good accuracy. Look at some photos. Correct me if I'm wrong, 60mh / h => 110Hz. I could beat 60sec / 1miles. Brazil greetings to the forum friends.
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Hello Adrian, now rode the converted board successfully speedometer. Tomorrow will test the car. Thank you for your posts on the forum.
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Hi Adrian,
My speedo with your board is still absolutely perfect with no issues at all.. However I broke the glass whilst I was sorting out some generic wiring behind the dash. Do you have a GT4 speedo in bits at the moment? If so could you measure the diameter and thickness of the glass please so I can order another one
I don't want to take the dash out again until I have a glass to refit.

Cheers
Nick

 

Thank you!
Next silly question, do you have any idea where you can buy / get them from!

Cheers
Nick

 

Hi Adrian,
Well, after 5500 miles, my NOS replacement speedo in my 328 is beginning to act up, just like my original one did... needle pegs momentarily, then goes dead. Sometimes, a slap on the binnacle will revive it... Any outlook on your awesome modern board for my 328?

 

I think it's unlikely, mainly because this speedo head has been rock solid for 5.5K miles, and suddenly started acting just as the old one did, when it failed. It's happening very seldom, but definitely happening - even when stopped, the needle momentarily pegs full scale, then returns to zero, dead even when moving, until I slap the binnacle, and then it usually comes back to operational.

I'm in line to buy your new kit, as soon as you have it ready for my car. We managed to get two extra years out of it, so that's not so bad...

I might even buy two of your kits, so I can fix both Speedo heads!

Any idea when you might be able to get back to the project?

Many thanks, Adrian. You're a lifesaver!

 

It seems as there is also a version 3 of the early type 1 printboard, see attachment. I also have a speedo in my euro drysump 77 GTB where the speedo is running, but odo and tripcounter does not.
On the advice from Adrian I would change the transistor BC327, but when I opened the speedo there is a different transistor on the printbord which is a Little different from v.1 and v.2 where the transistor is mounted. This transistor has the number BD520 and has the colorcode grey/purple/red ,legs is E B C.
Does anyone know if I can use the BC327 instead of this one ?
Adrian is unfortunelately out of printboards at the moment, anyone know where to get the ITT chip SAY115Y ?
Best regards Jesper
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I've found that small zip ties fit well under the socket and secure chips very well.

 

A TIP36C would be a good replacement and has the same pinout, should be easy to source

Thanks for the answer Adrian.
When your printboards are finished I would like to buy 2 .
Best regards
Jesper

 

I hope someone can help me,i have a 308gts speedo with failed SAY115Y chip.Is there any one still making replacement PCB's i can buy,or supply a circuit diagram to build one? This one goes up to about 40MPH then drops to zero.Not good.Thanks.

 

I have a 308 with a dud SAY115Y ic,are these replacement PCB's still available,or if not a circuit diagram?,this one goes upto 40MPH then dies,bit worrying!

 

Hi Adrian,
Thanks for following-up with this one.... I'm still interested in buying 2X of your new design for my 1988 328 GTS. Last I recall, you mentioned the board was finished, but the software was yet to be completed for my application.
I can understand very well your 'work/work balance issues', as I have similar challenges - I was nearly killed in a cycling crash three weeks ago, where a car hit me head-on, resulting in a 40 mph impact that fractured 6 ribs, collapsed a lung, and broke three vertebrae (among many less serious injuries). So, I'm out of commission for some time now, but thankful that I will survive.
Any outlook on when I might be able to purchase these speedo kits from you?
Many thanks,
Tim

 

Oh, I am in for updates as I would like one repaired as well.

Aaron