DonConPad
About the DonConPad PCB
DonConPad is an open source PCB design by ravinrabbid, published on GitHub under the MIT license. It is a 2-layer board measuring 78.7 × 40.6 mm, with 28 components from 23 distinct parts.
Other key parts include the MCP23017_SO. By type, the board carries 14 switches, 6 resistors, 3 jumpers, 2 connectors, 2 capacitors and 1 IC.
It belongs with the audio and displays & leds designs in this gallery.
From the project
RP2040 based firmware and hardware for DIY Taiko no Tatsujin Drum Controllers
This board breaks out an MCP23017 I/O expander to some conveniently placed push buttons and offers a spot for an SSD1306 OLED display. Both I/O expander and display are connected to the same i2c bus.
The i2c address for the MCP23017 can be configured using the jumpers JP1, JP2 and JP3, which are pulled down to GND when open.
A 3D-printable case can be found in the case subdirectory. Print the Top, the Bottom and 14 Buttons. Insert 6mm diameter M4 heat set inserts into the top part and screw together using M4 screws.
Main components on the DonConPad
DonConPad bill of materials (BOM)
28 components, 23 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MCP23017_SO | SOIC-28W_7.5x17.9mm_P1.27mm | U1 |
| 1 | Display | PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | Host | JST_PH_S5B-PH-K_1x05_P2.00mm_Horizontal | J2 |
| 1 | A0 | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | A1 | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP2 |
| 1 | A2 | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP3 |
| 1 | Up | SW_PUSH_6mm_H5mm | SW1 |
| 1 | Down | SW_PUSH_6mm_H5mm | SW2 |
| 1 | Left | SW_PUSH_6mm_H5mm | SW3 |
| 1 | Right | SW_PUSH_6mm_H5mm | SW4 |
| 1 | North | SW_PUSH_6mm_H5mm | SW5 |
| 1 | South | SW_PUSH_6mm_H5mm | SW6 |
| 1 | West | SW_PUSH_6mm_H5mm | SW7 |
| 1 | East | SW_PUSH_6mm_H5mm | SW8 |
| 1 | L | SW_PUSH_6mm_H5mm | SW9 |
| 1 | Select | SW_PUSH_6mm_H5mm | SW10 |
| 1 | Share | SW_PUSH_6mm_H5mm | SW11 |
| 1 | R | SW_PUSH_6mm_H5mm | SW12 |
| 1 | Start | SW_PUSH_6mm_H5mm | SW13 |
| 1 | Home | SW_PUSH_6mm_H5mm | SW14 |
Show 3 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 0.1uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1 |
| 1 | 10uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2 |
| 6 | 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R4, R5, R6 |
DonConPad design files
The KiCad project lives in the ravinrabbid/DonCon2040 repository on GitHub; these links point at the commit this page was built from.
DonConPad: common questions
How big is the DonConPad PCB?
The DonConPad measures 78.7 × 40.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the DonConPad?
28 components, from 23 distinct parts. The full bill of materials is listed on this page.
Where can I download the DonConPad design files?
From the ravinrabbid/DonCon2040 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the DonConPad design in my own project?
Yes, under the terms of its MIT license, which ravinrabbid chose for the repository.
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