Makerbot Watch Instructions

Warning: Making this watch from scratch is hard!


The Red LEDs have the green mark on them pointing counterclockwise and have a mark on them pointing away from the arrow. The green and yellow have the arrow pointing to the green mark.

Why do they have green marks on different ends of the LED??? I DON"T KNOW!

Step 1. Make sure you have all the parts. These kits have all be put together and then checked by a human so they should all be there. Here's a picture of all the pieces all labeled.

Here's a big picture of the parts: []

Step 2. Put solder paste on all the pads. You can get the surface mount toolkit if you want! []

Step 3. Use the parts list to see where things go. Put all the parts on paste.

Step 4. Cook it. Solder the battery on the back with the positive side going under the GPL v3 text. See photos to make sure you're doing it right. I left the headers off because I figured they would catch on my sweaters and I just put them in loose and tipped them so they made contact with the pins.

Step 5. Go over it with a microscope or a magnifying glass and use solder wick to take all the solder bridges off and make sure everything worked.

Step 6. Replace your boards.txt file within the Arduino package with the boards.txt file linked from the main MakerBot Watch wiki page.

Step 7. Burn the bootloader. Note: you can test it to make sure it's the right direction by making sure the positive and negatives supplying power are the right way. We use a USBtiny to do this and use Arduino to burn the bootloader. (Make sure to choose the MakerBot Watch 328 from the boards menu in Arduino which is there because you replaced the boards.txt file)


Step 8. Upload the sketch using a TTL cable. Again, I put a breakaway pins into the header of the cable and then pushed it into the board and tilted it to make contact. You will need a battery inserted (or another power source) to program your watch.

Step 9. Revel in the glory of LEDs. More sketches coming later!

Matt Joyce described how he did it!

I just built it today… and theres a bunch of ways to approach this…

what I did was…

used fine solder
used wick ( to clean up globs of solder )
used my soldering iron with an ultra fine point
used the magnifier headset from the machine room need to see small stuff
used tweezers to place and hold stuff
And just soldered like I would anything. Worked fine.

The microscope is probably worth using to check the solder work on the avr chip. That is in my opinion the hardest bit to do.

Order I went in…

AVR chip first.
Then Resistors
Then Capacitors
Then I suggest doing the leds
Then the buzzer
Then the crystal
Then whatever else.

smallest to biggest…. avoid putting in headers / battery packs till last… hard to work without an even board underside.


Ben Combee's Assembly Tips

If you're soldering by hand, I'd suggest first soldering the Atmega 328p chip, then check it out with magnifier and use a multimeter to check for hidden bridges, making sure adjacent pins are shorted. Then, install the crystal and the two 15pF caps to have a working oscillator. Then, get our the ICSP programmer and flash the bootloader. This will verify that the microcontroller works before you clutter up the board with a lot of extra components, making it easier to rework things.

After programming the chip, I would tend to work going out from the center, trying to avoid having to go back and solder in parts that are blocked on all sides by other parts. Be careful not to drip solder off your iron onto other pads, as I did this with my first board and ended up messing up the VCC pad on the ISP connector as it lifted when I tried to remove the solder.

Charles Pax made this amazing Parts List!

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