Fredboard

Thebucket-ops·Fredboard·v2/PCB/devboard.kicad_pcb

About the Fredboard PCB

Fredboard is an open source RP2040/RP2350 PCB design by Thebucket-ops, published on GitHub under the MIT license. It is a 2-layer board measuring 51 × 21 mm, with 41 components from 21 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the MCP1700X-330XXTT, W25Q16JVUXIQ TR and MPU-6500. By type, the board carries 20 capacitors, 9 resistors, 4 ICs, 4 connectors, 2 switches and 1 crystal.

It belongs with the dev boards & breakouts designs in this gallery.

From the project

A Pi pico devboard

The fredboard is a custom pi pico devboard: - the v2 has a MPU-6500 and has a reboot button with a led to indicate the restart; - the v1 (untested) allows to use all but one pins provided by the rp2040, and has a led to indicate when the devboard is powered

- 2 33pF 0402 capacitors - 13 0.1uF 0402 capacitors - 2 1uF 0402 capacitors - 2 10uF 0603 capacitors - 1 10 nF 0402 capacitor - 1 0402 white led - 1 USBCReceptacleUSB2.014P - 2 pinheaders 1x20 (optional) - 1 pinheader 1x3 (optional) - 2 0402 27 ohm resistors - 1 0402 150 ohm resistor - 3 0402 1K resistors - 2 0402 5.1K resistors - 1 0402…

Fredboard, from the project README — From the project README

Main components on the Fredboard

RP2040 MCP1700X-330XXTT W25Q16JVUXIQ TR MPU-6500

Fredboard bill of materials (BOM)

41 components, 21 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	RP2040	QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm	U1
1	MCP1700X-330XXTT MCP1700x-330xxTT	SOT-23	U2
1	W25Q16JVUXIQ TR	Winbond_USON-8-1EP_3x2mm_P0.5mm_EP0.2x1.6mm	U3
1	MPU-6500	QFN24_3X3X0P9_IVS	U5
1	CRYSTAL_GND24 Crystal_GND24	Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
1	USB_C_RECEPTACLE_USB2.0_14P USB_C_Receptacle_USB2.0_14P	USB_C_Receptacle_HRO_TYPE-C-31-M-12	J1
2	CONN_01X20 Conn_01x20	PinHeader_1x20_P2.54mm_Vertical	J2, J3
1	CONN_01X03 Conn_01x03	PinHeader_1x03_P2.54mm_Vertical	J4
2	SW_Push	SW_Push_SPST_NO_Alps_SKRK	SW1, SW2
1	LED	LED_0402_1005Metric	D2
2	1UF 1uF	C_0402_1005Metric	C1, C12
12	0.1UF 0.1uF	C_0402_1005Metric	C2, C3, C4, C5, C6, C7, C8, C9 +4
2	10UF 10uF	C_0603_1608Metric	C13, C14
2	33PF 33pF	C_0402_1005Metric	C15, C16
1	100NF 100nF	C_0402_1005Metric	C21
1	10NF 10nF	C_0402_1005Metric	C22
2	5.1K	R_0402_1005Metric	R1, R2
2	27	R_0402_1005Metric	R3, R4
3	1K	R_0402_1005Metric	R5, R7, R8
1	10K	R_0402_1005Metric	R6

Show 1 more

Qty	Part	Footprint	Refs
1	150	R_0402_1005Metric	R9

Fredboard design files

The KiCad project lives in the Thebucket-ops/Fredboard repository on GitHub; these links point at the commit this page was built from.

Fredboard: common questions

What microcontroller does the Fredboard use?

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

How big is the Fredboard PCB?

The Fredboard measures 51 × 21 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Fredboard?

41 components, from 21 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 Fredboard design files?

From the Thebucket-ops/Fredboard 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 Fredboard design in my own project?

Yes, under the terms of its MIT license, which Thebucket-ops chose for the repository.

Can I test firmware for the Fredboard 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.