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Experimenting with the Tissot T Touch

by J.Edwards

I’ve been curiousily investigating transparent electrodes to try and develop a larger touch display for my Tissot T Touch, in hopes of one day being able to develop it into pocket watch dimensions. I love my T Touch, though I tend to use it mainly for adventuring and rarely ever pull it out for daily wear, sticking to my manually wound pocket watch instead. It’s a pretty hefty wristwatch, and I like to keep my wrists fairly light and nimble when I’m at the watchmaking bench. Not having a watch on my wrist also keeps me from getting stressed over what time it is. For me, a pocket watch sits just right. There are days, though, when I’m not on the trail that I wish I had the T Touch’s weather trending or compass features readily at hand. That said, the idea of outfitting its mechanism into a handsomely sublime pocket watch still stands a few lengths short of being a pipe dream. Today, though, marks at least one experimental step closer to making that dream a reality.

Graphene shows incredible promise as a potential electrode, but mainstream adoption is still a few years off. I’ve been banking on the fact that Tissot has likely been using the presently much more common indium-tin-oxide, or ITO for short. It’s the same thin film substrate that’s been driving electrons across liquid crystal displays for near on half a century now. That fact in mind, I ripped apart a defunct, old calculator, which boasted a rather large display that I then proceeded to shatter in order to procure myself a suitably sized piece of ITO coated glass. 

Don’t Try This at Home:

Battery locked and loaded, shard in hand, and the naked T Touch movement under my loupe, I poised my finger above the glass and made my first contact. Results of that first touch were a bit questionable, so I repositioned, and every one thereafter sang sweet success. Downright magical, this indium-tin-oxide.

Stage II: learn how to sputter.

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