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Re: DIY Ultegra Di2 TT [ziggys101] [ In reply to ]
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ziggys101 wrote:
Yes its as simple as that and the cable will be long enough unless your extensions are huge :-)
Thanks a bunch!
Last edited by: kornfake: Jun 24, 14 2:55
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Re: DIY Ultegra Di2 TT [kornfake] [ In reply to ]
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Just about done retrofitting my S5.

Having a hell of a time getting the cateye buttons to behave. 2 out of 3 sets don't respond consistently. Going to try cutting the wires closer to the button itself and using something a little more stout, but I may have to resort to something different.
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Re: DIY Ultegra Di2 TT [steve.strong] [ In reply to ]
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Is it possible to install the di2 internal battery in the aerobar extensions?

Thanks
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Re: DIY Ultegra Di2 TT [20speedyx] [ In reply to ]
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Apologies for the bump guys, I've read almost all of this thread and numerous other threads and before I bite the bullet and start ordering in parts I wanted to clarify some stuff.
Plan on getting ultegra di2 for my P5 with maguras. I want to be able to rear shift from the brakes as well as from the extensions.
So am I right in saying for the front end I need

2 R671s for the extensions (obviously)
5 port hub
di2 climbing shifter
cateye switches to help get the climbing shifters down in size
I have read about getting an extra junction in order to extend the reach of the climbing switch from the stem based hub to reach to the brake, is this the case?

Any up to date advice on this would be much appreciated
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Re: Scott Plasma 3 Ultegra Di2 Hack with Extension Mounted Rockers [Prospero] [ In reply to ]
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Hi
could you send me the pics too rcyachtie@hotmail.com
Thanks
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Re: DIY Ultegra Di2 TT [Telemachus] [ In reply to ]
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Hi will it work is if I solder the r-671 straight to the ew-67-e junction?
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Re: DIY Ultegra Di2 TT [ziggys101] [ In reply to ]
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Finally found time to solder wires to the PCB of a SW-R600. Could have used better eyesight and steadier hands, but what can you do. Once I figured out how to connect these to the Cateye switches I got off Ebay everything was fine. The red and black wire goes to the middle wire in each of the switches. The blue goes to the combined outer wires from both switches. Smooth shifting and still recognized as a R600 in the E-Tube software. Next up is protection and final wiring.


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Re: DIY Ultegra Di2 TT [acco] [ In reply to ]
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A few layers of PRF 202 plastic spray on the PCB for protection. Waiting for some self vulcanizing tape to cover it. Otherwise just a lot of wire splicing, not so waterproof, I suppose, but should be splash proof. Hopefully good enough. Retested today, works like a charm. Will put switches under base bar brake levers, I think, PCB inside aerobar.


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Re: DIY Ultegra Di2 TT [aidan77] [ In reply to ]
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aidan77 wrote:
Hi will it work is if I solder the r-671 straight to the ew-67-e junction?

you could, but really, there's an easier solution: connect the two pieces using a JC-41. That's what i previous did.
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Re: DIY Ultegra Di2 TT [echappist] [ In reply to ]
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Hi. ok so ive connected the r671 to the ew-67-e using the jc-41 and I have 6770 deraileurs and an external battery but the shifters wont shift the derailleurs, when i connect sti 6770 shifters to the srt up it all works but the r671 dont seem to work, Ive read that people have just plugged and played with the r671 but not for me, if it matters the r671 came from japan via ebay..

any advice? how do I connect to pci unit when using the ew-67-e and the r671??
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Re: DIY Ultegra Di2 TT [aidan77] [ In reply to ]
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aidan77 wrote:
Hi. ok so ive connected the r671 to the ew-67-e using the jc-41 and I have 6770 deraileurs and an external battery but the shifters wont shift the derailleurs, when i connect sti 6770 shifters to the srt up it all works but the r671 dont seem to work, Ive read that people have just plugged and played with the r671 but not for me, if it matters the r671 came from japan via ebay..

any advice? how do I connect to pci unit when using the ew-67-e and the r671??

what your current set up again and what was the previous setup? in particular, how many shifter units in each? how are they connected to a controlling junction (be it EW67 or EW90), and how is it connected to the rear JC-41 (to battery, FD, and RD)?

there could be a firmware compatibility issue btwn all the various pieces

also, by PCI, do you mean PCI-E, the PC interface that sets up the the firmware? if so, i think the interface plugs into an open port/wire; usually people disconnect the wire to the RD and connect that to the PCI-E (don't quote me on it). here may be something informative re: my old set up. also, one doesn't necessarily need the PCI-E if you have the internal battery charger

http://forum.slowtwitch.com/...earch_engine#4928130
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Re: DIY Ultegra Di2 TT [echappist] [ In reply to ]
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Hi, it is my tri bike and i have r671 for shifters (no brake lever shifters, connected to ew-67-e via a jc-41, then I have 6770 FD and RD and external battery connected to the ew-67-e by connecting and solder wires together inside the frame, and seal. everything up to the ew-67-e works fine as ew-67-e lights up green when battery is connected and when I connect the ew-67-e to the 6770 sti shifters on my road bike it all shifts perfect... r671 are new and all other parts are 2nd hand .. My understanding is a firmware problem but Im not familiar with preforming the firmware update and the process
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Re: DIY Ultegra Di2 TT [aidan77] [ In reply to ]
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could very possibly be firmware compatibility issue. if you are in the DC area, i'd be happy to help.
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Re: DIY Ultegra Di2 TT [aidan77] [ In reply to ]
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if you have an internal battery then I believe you need to change your a-junction out for a ew-90 3 or 5 port in order to work. here is an excellent resource for everything di2:

http://carltonbale.com/...ng-you-need-to-know/

edit: just noticed you said you have external battery. probably firmware update issue then
Last edited by: ChrisT: Nov 8, 15 18:18
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Re: DIY Ultegra Di2 TT [ChrisT] [ In reply to ]
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Stuffed everything inside base bar in the end, switches behind brake levers, covered and held in place with ODI rubber grips over the oval base Cateye switch protector. One on each side and used for rear switching only. Regular Shimano TT-switches on aerobars.

Feels solid and works a charm. I really like these, 3-finger brake, 1-finger switching is possible and I can keep 1 finger in front of the switch, if needed.



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Re: DIY Ultegra Di2 TT [acco] [ In reply to ]
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One person on this thread a year or two ago talked about building a micro or Arduino board to do fancier shifting. Does anyone know of any examples of any non-Shimano micros attached to 6870/9070 di2? Or software hacks to the Shimano di2? Or discovery of the di2 hardware protocol? My initial tests show a 1Mhz signal about 0.75 volts, varying amplitude and duration. Not sure yet if it is amplitude modulated, time modulated, or much tighter frequency control than I would initially expect and different frequency per sender.

My plan is to build a pseudo-sequential shift where shifting the front also shifts the rear a programmable number of times. I can do this with just a hack micro and a soldering iron (and a bit more ...), but it would be easier to attach if I had a decode of the protocol.

Or I could just switch to EPS and use shiftAssist ...

Michael Wilson
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Re: DIY Ultegra Di2 TT [carhillclimb] [ In reply to ]
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Hi folks,
Read through all 13 pages and there’s a lot of great info from you guys.
I’m years behind the trend, but I am finally taking my 1x10 (maybe 11) bike to Di2, I was just about to buy an EW90-A to plug a climbing switch into, but I came across a EW-RS910 bar end junction and wondered if this was going to work as an ‘A’ junction?
As I only have the one shifter (SW-R600) to connect to the junction then wire back to the B.B. junction.


You shouldn't let a girlfriend have any say on a bike build for her. If she loves you she'll love the bike. If it's all about the bike, then you're just a supplier. The same is true of engagement rings.
- Retro Grouch -
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Re: DIY Ultegra Di2 TT [alex jb] [ In reply to ]
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alex jb wrote:
Hi folks,
Read through all 13 pages and there’s a lot of great info from you guys.
I’m years behind the trend, but I am finally taking my 1x10 (maybe 11) bike to Di2, I was just about to buy an EW90-A to plug a climbing switch into, but I came across a EW-RS910 bar end junction and wondered if this was going to work as an ‘A’ junction?
As I only have the one shifter (SW-R600) to connect to the junction then wire back to the B.B. junction.

Yes, the 910 works as an Ajunction box, but it only has 2 ports.
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Re: DIY Ultegra Di2 TT [dfroelich] [ In reply to ]
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Great, thanks.

As I am 1x10, 2 ports will be fine. I only have one signal line in and one wire out to the bottom bracket junction


You shouldn't let a girlfriend have any say on a bike build for her. If she loves you she'll love the bike. If it's all about the bike, then you're just a supplier. The same is true of engagement rings.
- Retro Grouch -
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