Made Firmware

Made Firmware that changed the neo-pixel colour dependent to the current mode.
Note: Keys are not the nicest arrangement on the board from code. - Trial and Error Required for reprogramming that.

Rotary Encoder is an audio knob unless pressed then it is a mode selector.
Keys are a bit of a jumble.

When booting press and hold the rotary encoder to get access to the drive interface.

Soldered PCB and added keycaps

All deliveries arrived and I soldered the diodes first then the microcontroller then the rotary encoder and finally the switches before adding keycaps etc.

Ordered Seeed Studio Xiao RP2040 - 0.5hrs

Put in my order for:

• seeed studio xiao rp2040 - Bit pricey but used discount code so now only paying shipping
• pcb - The pcb the fun part
• lcsc parts - x50 BAV16W diodes and a rotary encoder

Addresses and order codes censored

Found cheaper products - 0.7hrs

I found cheaper products from different retailers, to lower the price. Removed filament from BOM.
Using 4 retailers based on price, seeed studio for the rp2040 board, jlcpcb for the pcb, lcsc for the diodes and rotary encoder, Amazon for the mx switches.

Forgot to add this - 0.1hrs

Filament spool in black to give the Case and Keycaps a matte black colour as I don't have a matte filament that could be substituted in. Found on amazon for lower than my normal filament price.

~ Note Filament was removed from BOM

Organised a BOM for total price for all items - 0.4hrs

I organised the items to show the usd prices for anything is gbp instead and organise the raw item prices vs shipping costs. This helps understand the costs for reviewers

Found Keys and MCU - 1 hrs

I found the remaining components I need to buy: which are the seeed studio xiao rp2040, rotary encoder and key switches. The Case and keycaps will be 3D printed.

x2 of these

Looking for parts - 1hrs

PCb and diodes have been found but currently looking for keyswitches and keys to put on the board and yet to look for the seeed studio xiao rp2040 microcontroller

PCB Case - 2hrs

Made Case for the keypad and tried getting the pcb into jlcpcb but failed, due to kicad exporting BOM and CPL wrong, and I couldn't find a diode for the 203_603metric footprint

Complied with DRC rules - 1hrs

I selected ignore all for the clearance drc rules as it was due to using a smaller diode size which brought two wires / tracks too close to each other causing the errors.

Made a Board Render - 0.1hrs

I added a margin and made a render of the pcb to get an idea of what the shape of it will be and to start thinking if I want a case or enjoy the pcb in all its glory.

Routed PCB - 1.4hrs

I routed the pcb and removed a key to make space for the Xiao Seed Studio on the board. So the board has 4 columns with 5 rows with a total of 17 Keys and an rotary encoder

Created the Schematic for the Keypad - 0.7hrs

Made the schematic key arrangement is 4 columns by 5 rows:

• K = Key
• E = Rotary Encoder
• 2K = 2 tall key 1x2 size top and bottom will be written out

K K K E
K K K K
K K K K
K K K 2K
K K K 2K