Frambu

piruetasxyz·frambu·frambu-v-0-rev-a/frambu-v-0-rev-a.kicad_pcb

About the Frambu PCB

Frambu is an open source RP2040/RP2350 PCB design by piruetasxyz, published on GitHub under the MIT license. It is a 2-layer board measuring 50 × 60 mm, with 29 components from 14 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the AMS1117-5.0 and W25Q128JVS. By type, the board carries 17 capacitors, 5 resistors, 3 ICs, 3 connectors and 1 switch.

From the project

placa de desarrollo abierta basada en el microcontrolador RP2040 de Raspberry Pi, diseñada en KiCad para fabricarse y ensamblarse en JLCPCB.

la documentación, con capturas del esquemático, de la placa y la lista de materiales, está publicada en piruetasxyz.github.io/frambu y en docs/frambu.md.

este repositorio se usa para trabajo colaborativo y también como material de enseñanza: la idea es que cualquier persona pueda clonarlo, abrirlo, entender cómo está hecho y modificarlo.

Main components on the Frambu

RP2040 AMS1117-5.0 W25Q128JVS

Frambu bill of materials (BOM)

29 components, 14 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	AMS1117-5.0	SOT-223-3_TabPin2	U2
1	W25Q128JVS	SOIC-8_L5.3-W5.3-P1.27-LS8.0-BL	U3
2	Conn_02x18_Odd_Even	PinSocket_1x20_P2.54mm_Vertical	J3, J4
1	USB_C_Receptacle_USB2.0_16P	USB-C_SMD-TYPE-C-31-M-12_1	J5
1	PTS 636	KEY-SMD_L6.0-W3.5-LS8.7	SW1
2	1u	C_0805_2012Metric	C1, C9
9	100n	C_0805_2012Metric	C2, C3, C4, C5, C6, C7, C8, C10 +1
2	100u	C1206	C12, C18
3	10u	C0402	C13, C19, C20
1	10u	CP_Elec_4x5.4	C15
2	1K	R_0805_2012Metric	R3, R5
1	10k	R0402	R4
2	5k1	R0402	R6, R7

Frambu design files

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

Layoutframbu-v-0-rev-a/frambu-v-0-rev-a.kicad_pcb
Schematicframbu-v-0-rev-a/frambu-v-0-rev-a.kicad_sch
BOMframbu-v-0-rev-a/bom.csv

Frambu: common questions

What microcontroller does the Frambu use?

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

How big is the Frambu PCB?

The Frambu measures 50 × 60 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Frambu?

29 components, from 14 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 Frambu design files?

From the piruetasxyz/frambu 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 Frambu design in my own project?

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

Can I test firmware for the Frambu 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.