Cool W126 Clock project

[tinypanzer]

Hi all,


This is a decidedly non-car related thread. What I want to do is figure out a way to turn my extra W126 tachometer clusters (with the clock) and make them into some really cool desk clocks.

Getting the clock to work is easy, and I already have it sitting on my desk keeping perfect time. What I want to do is figure out what kind of signals drive the tachometer so that I can use a basic stamp or some sort of cobbled together driver for it so that I can turn the tach needle into the second hand of the clock.

Since 60 is right near redline, it will make a really cool desk clock once I figure out how best to drive the tach needle's d'Arsonval movement.

Of course I will share my findings here if anyone else wants to make a W126 desk clock.

So -- Anybody know the specifics of how that tach is driven and by what type of signal?