[T] Dorsal mounted solution

A project log for Tetent TimerSpy [gd0136]

A wearable PDA / smartwatch with a Tetent [gd0090] input method.

kelvinakelvinA 01/01/2023 at 18:040 Comments

I just found out that the back of the hand is called the "dorsal side of the hand". Why nothing simple like with "palm"? Well, in a search of a solution, I ruled out a VR glove style solution since I still need my hands to fit in pockets and the pushing force of the fingers is unlikely to be at the fingertips. The back of the hand (for which English still hasn't given a shorter name, like dors or something, though dorsum is probably good enough) is still free real estate. 

As I'll soon write in a #Tetrinsic [gd0041] log, my fingers demand a solution even thinner than 16mm. At the moment, it's feeling like under 6mm. I've got a solution in mind for that, but I also wanted something that addressed the other issues I've run into in the recent TimerSpy concepts, such as:

However, I don't want to give up that 10Ah battery I sourced (every other seller said no btw), and the 10Ah seller said that the size is 7.2x70x98mm). That's 37Wh. I'm finding 13" laptops and tablets with that kind of battery capacity!

The idea is to mount the devices on the back of the left hand and then the right hand slides in to eject it from the left and mount it under the right hand fingers (opposite hand roles for the other TimeSpy being worn). On these new TimerSpies, a smaller, likely MemoryLCD display is used for time tracking and the OLED, which is against the back of the hand, will be the main display. It would be infront of the palm when in use. It might be on a hinge to reorientate it to a more ideal angle, but I think the palm is ergonomic enough for now. I could probably also use an LCD for this, such as the cheaper 2.9" 120Hz 1440px one I found for #T^2 TyMist [gd0138], since the smaller screen would be the always-on display. If anything, sharing components like that could speed up overal project development because I really do need these things and I needed them 5 years ago.

In other news, I'm also going to be looking for another strap solution. The magnetic chainmail slowly loosens over time during use, and the magnet makes it hard ot put the TimerSpy on as it makes the whole chain stick to itself.