Todo-Pad

greywolfcode·Todo-Pad·pcb/TodoPad.kicad_pcb

About the Todo-Pad PCB

Todo-Pad is an open source RP2040/RP2350 PCB design by greywolfcode, published on GitHub under the MIT license. It is a 2-layer board measuring 99 × 97.3 mm, with 30 components from 4 distinct parts.

Its main chip is the XIAO-RP2040-DIP, from the RP2040/RP2350 family. Other key parts include the SSD1306_128x32_OLED_Display. By type, the board carries 14 switches, 14 diodes and 2 ICs.

It belongs with the keyboards and displays & leds designs in this gallery.

From the project

Fully Customizable Macropad

Note that case.step has just the case models, whereas full_model.step is the assembled model with PCB.

Main components on the Todo-Pad

XIAO-RP2040-DIPSSD1306_128x32_OLED_Display

Todo-Pad bill of materials (BOM)

30 components, 4 distinct parts.

Qty	Part	Footprint	Refs
1	XIAO-RP2040-DIP	XIAO-RP2040-DIP	U1
1	SSD1306_128x32_OLED_Display	SSD1306-0.91-OLED-4pin-128x32	U2
14	SW_Push	SW_Cherry_MX_1.00u_PCB	SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +6
14	D_Small	D_DO-35_SOD27_P7.62mm_Horizontal	D1, D2, D3, D4, D5, D6, D7, D8 +6

Todo-Pad design files

The KiCad project lives in the greywolfcode/Todo-Pad repository on GitHub; these links point at the commit this page was built from.

Layoutpcb/TodoPad.kicad_pcb
Schematicpcb/TodoPad.kicad_sch

Todo-Pad: common questions

What microcontroller does the Todo-Pad use?

The Todo-Pad is built around the XIAO-RP2040-DIP, from the RP2040/RP2350 family.

How big is the Todo-Pad PCB?

The Todo-Pad measures 99 × 97.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Todo-Pad?

30 components, from 4 distinct parts. The full bill of materials is listed on this page.

Where can I download the Todo-Pad design files?

From the greywolfcode/Todo-Pad repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Todo-Pad design in my own project?

Yes, under the terms of its MIT license, which greywolfcode chose for the repository.

Can I test firmware for the Todo-Pad without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.