Parts

Gather up the electronics and cables.

Install LED Display

Insert the 1.2in LED 7-segment display onto the breakout in the correct orientation.

Solder all of the pins from the LED display to the breakout board.

Clip the long pins using flush diagonal snips.

Reference the full assembly on the product learn guide.

Install Coin Cell Battery

Insert a fresh CR1220 coin cell into the coin cell holder with the positive side facing up.

Connect Components

Use the STEMMA QT cables to connect the electronics together.

• Connect the Feather RP2040 to the LED breakout
• Connect the DS3231 to the LED breakout
• Connect the Rotary Encoder to the DS3231

Mount for LED Breakout

Use the following hardware to secure the LED breakout to the mount.

• 4x M2 x 6mm 
• 4x M2 hex nuts

Place the 3D printed mount over the LED breakout with the mounting holes lined up.

LED Breakout Mount

Use the M2 x 6mm long screws and hex nuts to secure the LED breakout to the 3D printed mount.

Install Feather to PCB Mount

Place the Feather RP2040 over the PCB mount with the mounting holes lined up.

Secure Feather

Use 4x M2.5 x 6mm long screws to secure the Feather RP2040 to the PCB mount.

Install DS3231 to PCB mount

Place the DS3231 STEMMA QT breakout onto the PCB mount with the mounting holes lined up.

Secure DS3231

Use 2x M2.5 x 6mm long screws to secure the DS3231 breakout to the PCB mount.

Mounted Components

Take a moment to inspect that the components have been secured to the 3D printed mounts.

Size & Cut Gel Filter (Optional)

Use scissors or a hobby knife and straight edge to cut a piece of the gel filter to fit over the 7-segment display.

Recommended Filter Size: 132mm(5.2in) x 50mm (1.9in) 

Install LED Display Mount

Insert the LED display mount through the 3D printed enclosure.

Place the LED display mount over the built-in standoffs with mounting holes lined up.

Secure LED Display Mount

Insert and fasten 4x M3 x 6mm long screws to secure the LED display mount to the enclosure.

Secure Rotary Encoder

Remove the washer and hex nut from the rotary encoder.

Insert the rotary encoder through the hole on the side of the enclosure.

Use the washer and hex nut to secure the rotary encoder to the enclosure.

Install Rotary Knob

Press fit the rotary knob onto the shaft of the rotary encoder.

Install PCB Mount

Fit the PCB mount into the enclosure with the mounting holes lined up.

Install Base Legs

Place the 3D printed legs under the enclosure with the mounting holes lined up.

Secure Base Legs

Use 4x M3 x 10mm long screws to secure the base legs to the enclosure.

Install Back Cover

Snap fit the back cover onto the back of the enclosure with the USB hole lined up with the Feather RP2040's USB port.

Install Gel Filter (optional)

Place the sized gel filter over the LED display.

Install Front Cover

Press fit the front cover over the front of the enclosure.

USB Power

Plug in a USB-C cable to the Feather RP2040's USB Port.

Final Build

Congratulations on your build!