2 layers290.1 × 130 mm
2 layers21 × 51 mm
L3M0N Devboard
FlashLemonL/Devboard-L3M0NMy attempt at making a devboard using the tutorial for when i want to start making IoT projects.
- Size
- 21 × 51 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 47
- Nets
- 53
- Pads
- 195
- Tracks, vias
- 455, 52
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 17 Dec 2025
- Updated
- 22 Mar 2026
Overview
L3M0N Devboard is an open-source printed circuit board by FlashLemonL, from the FlashLemonL/Devboard-L3M0N repository on GitHub. It is a 2-layer board of 21 × 51 mm with 47 parts on 53 nets, routed with 455 tracks and 52 vias.
It is built around the RP2040. Its parts include 17 capacitors, 7 resistors, 4 connectors, 3 ICs and 1 diode. It belongs with the microcontroller boards boards and the RP2040 boards of this library.
Main components
1README
README.mdDevboard-L3M0N
My attempt at making a devboard using the tutorial for when i want to start making IoT projects.
3D Model of PCB
Front
Back
BOM
Parts Position
PCB
| Schematic | PCB |
|---|---|
 |  |
Parts
47| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C5, C6, C7, C8, C11, C12, C17 |
| 2 | 10uF | Capacitor_SMD:C_0603_1608Metric | C13, C14 |
| 2 | 1K | Resistor_SMD:R_0402_1005Metric | R5, R7 |
| 2 | 1uF | Capacitor_SMD:C_0402_1005Metric | C9, C10 |
| 2 | 27 | Resistor_SMD:R_0402_1005Metric | R3, R4 |
| 2 | 33pF | Capacitor_SMD:C_0402_1005Metric | C15, C16 |
| 2 | 5.1K | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | Conn_01x20 | Connector_PinHeader_2.54mm:PinHeader_1x20_P2.54mm_Vertical | J2, J3 |
| 1 | 10K | Resistor_SMD:R_0402_1005Metric | R6 |
| 1 | 12 MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J4 |
| 1 | LED | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1 |
| 1 | LOGO | KiCad-SSD1306-0.91-OLED-4pin-128x32.pretty-master:autobots | G*** |
| 1 | LOGO | KiCad-SSD1306-0.91-OLED-4pin-128x32.pretty-master:bubbles | G*** |
| 1 | LOGO | KiCad-SSD1306-0.91-OLED-4pin-128x32.pretty-master:eva | G*** |
| 1 | LOGO | KiCad-SSD1306-0.91-OLED-4pin-128x32.pretty-master:toot | G*** |
| 1 | LOGO | KiCad-SSD1306-0.91-OLED-4pin-128x32.pretty-master:jjk | G*** |
| 1 | LOGO | KiCad-SSD1306-0.91-OLED-4pin-128x32.pretty-master:zane | G*** |
| 1 | LOGO | KiCad-SSD1306-0.91-OLED-4pin-128x32.pretty-master:decepticon | G*** |
| 1 | LOGO | KiCad-SSD1306-0.91-OLED-4pin-128x32.pretty-master:hackclub | G*** |
| 1 | LOGO | KiCad-SSD1306-0.91-OLED-4pin-128x32.pretty-master:httyd | G*** |
| 1 | LOGO | KiCad-SSD1306-0.91-OLED-4pin-128x32.pretty-master:goomba | G*** |
| 1 | LOGO | KiCad-SSD1306-0.91-OLED-4pin-128x32.pretty-master:lemon | G*** |
| 1 | LOGO | KiCad-SSD1306-0.91-OLED-4pin-128x32.pretty-master:starwars | G*** |
| 1 | LOGO | KiCad-SSD1306-0.91-OLED-4pin-128x32.pretty-master:pstar | G*** |
| 1 | MCP1700x-330xxTT | Package_TO_SOT_SMD:SOT-23 | U1 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U2 |
| 1 | SW_Push | Button_Switch_SMD:SW_Push_SPST_NO_Alps_SKRK | SW1 |
| 1 | USB_C_Receptacle_USB2.0_14P | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | W25Q16JVZPIQ TR | Package_SON:Winbond_USON-8-1EP_3x2mm_P0.5mm_EP0.2x1.6mm | U3 |
Questions
How big is the L3M0N Devboard PCB?
It measures 21 × 51 mm and has 2 copper layers, 1.6 mm thick.
What parts does the L3M0N Devboard use?
47 parts, built around the RP2040. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the L3M0N Devboard KiCad files?
From the FlashLemonL/Devboard-L3M0N repository on GitHub, at the commit this page was made from: the board is L3M0N Devboard/L3M0N Devboard.kicad_pcb and its schematic L3M0N Devboard/L3M0N Devboard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the L3M0N Devboard design in my own project?
Its repository states no licence, so its author keeps all rights: ask FlashLemonL before reusing the design.
Similar boards
- 4 layers50 × 30 mm
Picodvi
Fr4nkFletcher/ESP32-Marauder-Cheap-Yellow-Display
ESP32Marauder Cheap Yellow Display
55 parts1.8kMIT - 4 layers299 × 127 mm
- 2 layers42 × 67 mm
- 2 layers181 × 97 mm
OpenDeck r3.1.2
shanteacontrols/OpenDeck
A platform for building interactive control and sensing devices using MIDI and OSC built with Zephyr RTOS.
262 parts960Apache-2.0 - 4 layers82.6 × 82.5 mm
- 4 layers102.9 × 96.7 mm
PicoGUS chipdown
polpo/picogus
Emulation of ISA sound cards and CD-ROM on Raspberry Pi Pico (GUS, SB/Adlib, MPU-401, Tandy, CMS, Panasonic CD-ROM) with USB mouse/joystick support
99 parts805 - 2 layers53.2 × 24.8 mm
