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ASSEMBLY.md

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How to assemble your badge

You will need:

  • Soldering iron
  • Side cutters
  • Safety glasses
  • Ventilation

Step 1

Make sure you have all the parts. You should have in your bag:

  • 1 x battery holder + boost converter
  • 1 x attiny85 microcontroller board + headers
  • 1 x acrylic disk
  • 1 x black round PCB with CHCon logo
  • 1 x led ring, with 16 RGB leds
  • 1 x additional headers

parts-list

Step 2

Cut the headers into smaller strips with the side cutters so you have:

10 x 1-pin
2 x 3-pin
1 x 2-pin

Note: rest your finger on the end you are cutting off so it doesn't fly away. Wear safety glasses.

Get the 2-pin header, and push it through the back of the PCB, and solder it onto the front (side with the logo).

This step will save us from headaches later. Don't over-do it with solder on these pins, as we won't have much space later on.

two-pin-header

Step 3

On six of the single pin headers, cut off the shorter end with the side cutters.

Note: same as above, rest your finger on the end you are cutting off so it doesn't fly away. Wear safety glasses.

shorten-headers

Step 4

Peel the backing off the acrylic disk. Place the six pins in the disk as shown. You could use tape to keep them in place, on the flush side.

acrylic-disk

Step 5

Lay the PCB on top of the 6 pins.

assemble-pcb

Step 6

Place the led ring on top of the 6 pins, so that the pins are only just in the holes.

Solder the pins on the bottom PCB.

Push the ring down on the pins.

Solder the pins on the top of the led ring.

Wear safety glasses, and have proper ventilation while soldering.

assemble-ledring

Step 7

Flip the disk over.

Place the 2-pin, and two 3-pin headers into the disk as shown

digispark-headers

Step 8

Before pushing the attiny85 board down, just make sure the pins that connected the LED ring don't come out past the disk. You could put some tape down to separate the disk and the attiny. If the pin pierces the soldermask on the attiny it might connect 5V to GND.

Push the attiny85 board onto the pins, and solder.

Wear safety glasses, and have proper ventilation while soldering.

assemble-digispark

Step 8a

We need to fix a happy-little-PCB-accident to the board.

Get some wire and connect two pins on the digispark, 5V and VIN. Like so:

pcb-accident

Step 9

Solder on the other side too.

Wear safety glasses, and have proper ventilation while soldering.

digispark-other-side

Step 10

Place the four remaining 1-pin headers like so:

battery-headers

Step 11

And solder the battery holder on. Note the orientation must be correct. On/Off switch away from the attiny85 board.

Make sure to solder the other side too.

Wear safety glasses, and have proper ventilation while soldering.

assemble-battery

Done

What are the other holes for? Buttons that are somewhere between Shanghai and Auckland :(

You should be able to solder on tactile switches and use them as inputs on the Digispark.

Now you can try the Badge Challenge