PicoDCC

bazauto·PicoDCC·hardware/PicoDCC.kicad_pcb

About the PicoDCC PCB

PicoDCC is an open source RP2040/RP2350 PCB design by bazauto, published on GitHub under the MIT license. It is a 2-layer board measuring 40 × 100 mm, with 28 components from 16 distinct parts.

Its main chip is the RaspberryPi_Pico, from the RP2040/RP2350 family. By type, the board carries 8 test points, 8 resistors, 3 connectors, 2 ICs, 2 transistors and 2 diodes.

From the project

DCC command station firmware for the Raspberry Pi Pico 2 — PIO-generated track signal, partial DCC-EX protocol for JMRI, LVGL touchscreen UI

The carrier PCB the firmware runs on: a Raspberry Pi Pico 2 soldered down, two BTS7960 H-bridge modules (main and programming track), their fault LEDs, and headers for the display and debug. KiCad project, BOM and the Gerbers as sent to fab.

It was designed in KiCad 9.0.1 in April 2025, before this repo had any design review, and it is imported as it was built. Nothing in the KiCad files has been changed on the way in. The concerns found while importing it are listed below rather than fixed, because the boards in use are this revision.

Main components on the PicoDCC

RaspberryPi_Pico

PicoDCC bill of materials (BOM)

28 components, 16 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
2	~	PinHeader_2x04_P2.54mm_Vertical	U1, U2
1	RaspberryPi_Pico	RaspberryPi_Pico_SMD_HandSolder	A1
2	BC108	TO-18-3	Q1, Q2
1	CONN_01X16 Conn_01x16	PinHeader_1x16_P2.54mm_Vertical	J1
1	Debug	PinHeader_2x03_P2.54mm_Vertical	J2
1	5v PWR	TerminalBlock_RND_205-00012_1x02_P5.00mm_Horizontal	J4
2	TP_M_PWM	PinSocket_1x01_P2.54mm_Vertical	TP1, TP4
2	TP_M_EN	PinSocket_1x01_P2.54mm_Vertical	TP2, TP5
2	TP_M_IS	PinSocket_1x01_P2.54mm_Vertical	TP3, TP6
1	TP_VCC	PinSocket_1x01_P2.54mm_Vertical	TP7
1	TP_GND	PinSocket_1x01_P2.54mm_Vertical	TP8
1	Main_Break	LED_D3.0mm_Clear	D1
1	Prog_Break	LED_D3.0mm_Clear	D2
2	0.1UF 0.1uF	CP_Radial_D4.0mm_P2.00mm	C1, C2
6	1K	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R1, R2, R3, R4, R7, R8
2	330	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R5, R6

PicoDCC design files

The KiCad project lives in the bazauto/PicoDCC repository on GitHub; these links point at the commit this page was built from.

PicoDCC: common questions

What microcontroller does the PicoDCC use?

The PicoDCC is built around the RaspberryPi_Pico, from the RP2040/RP2350 family.

How big is the PicoDCC PCB?

The PicoDCC measures 40 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the PicoDCC?

28 components, from 16 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the PicoDCC design files?

From the bazauto/PicoDCC repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the PicoDCC design in my own project?

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

Can I test firmware for the PicoDCC 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.