The time has come for me to combine all the knowledge I’ve gained through my watch prototypes and create the ultimate watch. The Walltech Smart watch. I’ve started on the design, and the PCB is almost complete, and it’s set to be finished by the end of the summer.


  • FemtoduinoBLE


The latest from Femtoduino, the FemtoduinoBLE uses an atmega32u4 from Atmel bootloaded as an Arduino Leonardo and a BlueGiga bluetooth 4.0 low energy module to connect to compliant devices and receive notifications for the watch. It’s tiny size and low power consumption make it perfect for use in this new watch.

  • 1.5″ full color OLED display with onboard microSD card slot from Mike Rankin

BorVY5sCYAMnjVdA step up from the monochrome .96″ OLED display of v4.2, this screen also consumes very little power thanks to the OLED technology behind it and can show beautiful images that will be the GUI for the smart watch. Now that there’s an sd card on board, I can use fancy graphics and make it look professional and keep the code to the microcontroller, enabling more to be coded instead of storing images too.

  • 3D Pedometer Module from Nicerf


This tiny, tiny module will connect to the watch’s I2C lines as the DS1307 does, and counts steps using a tiny accelerometer and buffer memory. It’ll be used to add fitness tracking capability to the watch and in conjunction with the phone app, keep track of calories burned and activity levels! Oh, and did I say this thing was tiny?

  • Other components

The DS1307 and it’s regulator will make an appearance again, and the same battery charging IC from the previous model will charge the now 500mah lithium ion battery. To make selections, there will be a surface mount 3 way navigation switch in the top right that you can flick up, down, and push in to make selections and scroll through faces and apps.



(Updated) PCB

Screen Shot 2014-06-06 at 7.41.48 PM

This is the current (updated) state of the PCB. I’m currently waiting for a dimensional drawing of the FemtoduinoBLE, and when that comes, I’ll incorporate it and have it completed.


The Walltech Smart Watch v6.0 (idea)

7 thoughts on “The Walltech Smart Watch v6.0 (idea)

  • June 12, 2014 at 6:08 PM

    Love the blog! Can you tell me the part number for that switch. The picture right before pcb design.

    • June 17, 2014 at 2:49 AM

      Sorry! The blog marked you as spam and I just cleaned it out. Ok, the part number on digikey for the switch is 563-1340-1-ND. I can vouch for the manufacturer and switch style, I use them for everything, through hole or smd, vertical or right angle, they’re all great.

      • June 17, 2014 at 6:32 AM

        Awesome thanks! I plan to use that exact one. Updating my lipoOne pcb and others. I have like 10 of those 3 way navigation switches. If you want I can send you 5 as a friendly thanks 🙂

  • June 17, 2014 at 6:34 AM

    Forgot to mention that arduino pcb you listed is too expensive. I could make that for 1/2 the price but it does look awesome.

    • June 18, 2014 at 11:16 AM

      The femtoduinoBLE? I’m good friends with the guy who makes them and he sends me them to use in worthy projects. I agree, they’re very expensive, but for me they’re what’s easiest to procure and work with. I would love some of the switches! I’ve only found Sparkfun as a source for them, so five would be amazing! I’ll DM you on twitter.

      • July 2, 2014 at 8:43 AM

        It really is way too expensive at $70 just for an AVR on a tiny board. Surely his only market is hobbyists, companies can have their own stuff made any size they like. It’s a shame cos I’ve wanted a self-programmable watch for ages and yours looks fantastic!

        As it is maybe a Trinket will do, and I’ve been looking round Chinese equivalents and they’re around $10 for a similar size. Still, one Arduino is like another right?

        Currently either your watch, or waiting for someone to hack one of the future up-coming commercial ones, are my only options.

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