Topic: Custom Racing Tach HUD and Acewell speedo cable question.

[NateTheBookie]

Hey all, this is kind of a long shot, but here goes:

I'm trying to build a custom Speedo/Tach cluster that will interface wirelessly with these: http://shop.reconinstruments.com/Product/MODLive/900-00007
to give me a custom-built in-helmet HUD, instead of mechanical gauges.

I've got the bluetooth transmitter working, and the indicator lights wired up and a test Android App working. But now I'm trying to find a way to properly interface with the tach/speedo sensors on the bike. I think I'm going to pull the tach signal from the ignition with a low-pass filter installed near the ignition coils. But for the speedo, I'm trying to use one of the Acewell Speedo interface cables from Dime City Cycles:
http://www.dimecitycycles.com/vintage-cafe-racer-caferacer-bobber-brat-chopper-custom-chrome-acewell-2853-digital-motorcycle-speedo-speedometer-tach-tachometer-cable-honda-cb-cl-ace-s5.html

I'm trying to interface with this thing, but I can't figure out what kind of sensor is in there, I think it's probably a hall effect sensor (either two-pin, or three pin using the housing as ground) but I'm not sure. I asked the folks over at DCC if they had any idea, but they don't. I realize it's kind of a stretch, but does anyone on here have any idea how to do this?

[750essess]

It says it's a digital output. Would guess that it pulls whatever supply voltage you give it ground. No way of knowing for sure until u test it though. Why not use the tach cable they offer too?