Arduino Watch with Nokia 3110 screen

My goal for this project is to make a watch with selectable dials, stopwatch and millidays.

This idea started with an Aprils fools prank about metric-time. (http://www.youtube.com/watch?v=K35xG1buyFA)
First I wanted to make a metric clock but soon this idea evolved from a metric watch into an open course watch.

I knew that it would be hard (or impossible) to make the watch small enough to really wear, but I wanted to try it anyway.
This would be mostly a programming project, but that is nice for long, cold and dark winter nights. 

So my watch needs to be:

• small enough to wear
• easy to reprogram
• capable of showing metric time
• have selectable dails
• have an easy understandable menu structure
• controllable with just 2 buttons (digital watches with 4 buttons confuse me)
• cheap (I'm still Dutch you know)

Step 1: You will need

For the Watch

• Arduino Nano
• Nokia 3110 screen (Adafruit or something)
• 2 pushbuttons
• 2 10K resistors
• some wires
• (optional a thermometer-ic)
• 2 button-cell batteries
• 2 small magnets
• a small breadboard for prototyping if you want

Tools and stuff

• soldering iron
• solder
• desoldering pump (or wick)
• pliers
• usb-cable
• computer with Arduino software

Wristband

• silicon kit (black)
• buckle (from old watch)
   
• plank
• aluminum 15 mm x 15 mm L-profile
• aluminum strips and scraps
• screws
• polyester filler
• polyester topcoat
• wax
• superglue

tools and stuff

• screwdriver
• hacksaw
• old credit card 
• spatula
• dremel
• grinding stones for the dremel
• sanding paper
• some clean cloth
• rubber gloves
• ruler
• sharpy

Comments

[kondzio29]

And one more question: is it possible to make your project using nokia 3310 display extracted from an old phone ?

[kenyer]

Hi Kondzio,
I haven't tried it yet, but I think it should work with just a screen taken from an old Nokia. This is also just a screen soldered on a PCB.

[kondzio29]

isn't it nokia 3310 display?

[Timofte Andrei]

you should make an arduino clone using the bare minimum of parts needed for atmel chip to work. think about it! when you finish the project and everything will be ok, you don't have to reprogram the arduino every time. i think you should make your own arduino clone using the dimensions of nokia display board. using that amount of wires can be a real problem. and another idea is to use 3.3V for arduino instead of 5V. you will only need 2 batteries and a small low drop-out regulator to power everything. also, you can try something like automatic light up the screen when you turn the wrist to watch what's the clock. this small improvement it's used by casio watches. cheers!

[kenyer]

Cool ideas! I already made an Arduino-clone, but I won't be able to make it smaller than this one. I am waiting for my 3d-printer now to make a new housing for it. I like the idea of integrating a light-sensitive resistor and a tilt-sensor.
I should have used a 3.3V Arduino, but I didn't have one and this also works :)
Thank you for your ideas!

[hertzgamma]

Great work!

[arnefl]

Cool project. You could use voltage dividers like here http://www.instructables.com/file/F4VCSBHGJQEJQFX

[kenyer]

I know. They also exist in an IC format. The problem was that I din't have the parts (or the patience to wait for is) and I didn't have the room to put it.
The drawing is a really good explanation of the voltage divider.

[Cello62]

Great project!