Hardware

seedhammer·hardware·mainboard/pcb/mainboard.kicad_pcb

About the Hardware PCB

Hardware is an open source RP2040/RP2350 PCB design by seedhammer, published on GitHub under the Unlicense license. It is a 4-layer board measuring 205.3 × 78 mm, with 172 components from 77 distinct parts.

Its main chip is the RP2350_80QFN, from the RP2040/RP2350 family. Other key parts include the TMC2209-LA, LM74700, W25Q128JVSS, SN74LVC1G97DBVR and PCA9306DC1. By type, the board carries 82 capacitors, 51 resistors, 14 ICs, 7 transistors, 7 connectors and 5 inductors.

It belongs with the robotics & motion and displays & leds designs in this gallery.

From the project

Design files for the SeedHammer II hardware.

This repository contains the design files for the SeedHammer II machine.

The schematic and PCB are in KiCad format.

Generate production files (gerber, BOM, CPL) with the Go script:

Production boards are manufactured by JLCPCB with the following settings:

- Surface Finish: ENIG - Material Type: FR4 TG155 - Stackup: JLC04161H-7628 (impedance controlled)

The LCD is a ER-TFT035IPS-6 with capacitive touch from buydisplay.com. The variant with resistive touch is not supported by the firmware.

Hardware, from the project README — From the project README

Main components on the Hardware

TMC2209-LA LM74700 W25Q128JVSS SN74LVC1G97DBVR PCA9306DC1 TPS62933 ST25R3916-AQW AP33772S TLV75733PDBV DRV8701E AL8861Y RP2350_80QFN TPS16630RGE

Hardware bill of materials (BOM)

172 components, 77 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
2	TMC2209-LA	VQFN-28-1EP_5x5mm_P0.5mm_EP3.7x3.7mm_ThermalVias	U1, U2
1	LM74700	SOT-23-6	U5
1	W25Q128JVSS	SOIC-8_5.3x5.3mm_P1.27mm	U6
1	SN74LVC1G97DBVR	SOT-23-6	U8
1	PCA9306DC1	VSSOP-8_2.3x2mm_P0.5mm	U9
1	TPS62933	SOT-583-8	U10
1	ST25R3916-AQW	VQFN-32-1EP_5x5mm_P0.5mm_EP3.5x3.5mm_ThermalVias	U11
1	AP33772S	QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm_ThermalVias	U12
1	TLV75733PDBV	SOT-23-5	U13
1	DRV8701E	VQFN-24-1EP_4x4mm_P0.5mm_EP2.45x2.45mm_ThermalVias	U14
1	AL8861Y	SOT-89-5	U15
1	RP2350_80QFN	QFN-80-1EP_10x10mm_P0.4mm_EP3.4x3.4mm_ThermalVias	U16
1	TPS16630RGE	Texas_RGE0024H_VQFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm_ThermalVias	U17
3	AON7264E	DFN-8-1EP_3x3mm_P0.65mm_EP1.55x2.4mm	Q1, Q2, Q4
1	WSD40120DN56G	WSD_DFN-8-1EP_6x5mm_P1.27mm_ThermalVias	Q3
3	BSS138W	SOT-323_SC-70	Q5, Q6, Q7
1	ABM8-272-T3	Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
1	27.12MHz	Crystal_SMD_3225-4Pin_3.2x2.5mm	Y2
2	B4B-XH-2(LF)(SN)	JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical_Motor	J1, J5
2	WAFER-SH1.0-3PWB	JST_SH_SM03B-SRSS-TB_1x03-1MP_P1.00mm_Horizontal	J2, J4

Show 57 more

Qty	Part	Footprint	Refs
1	AFC07-S50ECC-00	TE_5-1734839-0_1x50-1MP_P0.5mm_Horizontal	J3
1	B2B-XH-A(LF)(SN)	JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical	J8
1	USB4105-GF-A-120	USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal	J9
2	TS3425BA	SW_Push_1P1T_NO_Vertical_Wuerth_434133025816	SW1, SW2
1	Thermistor_NTC	R_0402_1005Metric	TH1
1	1A	D_SOD-323	D3
1	3.3u	L_pol_2016	L1
2	270n	L_0603_1608Metric	L2, L3
1	6.8u	L_Vishay_IFSC-1515AH_4x4x1.8mm	L4
1	47u	L_Abracon_ASPI-3012S	L5
21	1u	C_0402_1005Metric	C1, C3, C4, C5, C6, C7, C8, C9 +13
14	10u	C_0402_1005Metric	C2, C11, C22, C51, C58, C59, C67, C68 +6
5	1u	C_0603_1608Metric	C13, C14, C24, C25, C44
2	220u	CP_Elec_8x10	C15, C26
2	100n	C_0603_1608Metric	C16, C27
2	22n	C_0402_1005Metric	C17, C28
1	4.7u	C_0402_1005Metric	C18
1	10u	C_0402_1005Metric_small_pads	C19
1	4.7u	C_0402_1005Metric_small_pads	C20
2	15p	C_0402_1005Metric	C29, C30
8	68pF	C_0402_1005Metric	C31, C32, C33, C34, C35, C36, C37, C38
3	10u	C_1206_3216Metric	C39, C50, C52
2	680p	C_0402_1005Metric	C40, C42
1	220n	C_0402_1005Metric	C41
2	12p	C_0402_1005Metric	C47, C49
5	2200u	CP_Radial_D13.0mm_P5.00mm	C48, C78, C79, C80, C81
4	100n	C_0402_1005Metric	C54, C55, C63, C64
1	47u	C_1206_3216Metric	C57
1	33n	C_0603_1608Metric	C60
2	10p	C_0402_1005Metric	C74, C77
2	220p	C_0402_1005Metric	C75, C76
1	33	R_0402_1005Metric	R2
2	27	R_0402_1005Metric	R3, R4
4	100	R_0402_1005Metric	R5, R6, R16, R17
4	1k	R_0402_1005Metric	R7, R19, R22, R53
4	150m,1%,1W	R_1206_3216Metric	R8, R12, R23, R27
1	82k	R_0603_1608Metric	R9
4	10k	R_0402_1005Metric	R13, R18, R43, R52
4	5.1k	R_0402_1005Metric	R14, R15, R36, R39
4	5.1k	C_0402_1005Metric	R20, R21, R25, R29
1	560k	R_0603_1608Metric	R24
2	3	R_0402_1005Metric	R26, R28
1	330	R_0603_1608Metric	R30
4	22k	R_0402_1005Metric	R31, R33, R46, R51
1	7.15k	R_0402_1005Metric	R32
2	200k	R_0402_1005Metric	R34, R37
2	5m,1%	R_0805_2012Metric	R35, R42
1	200	R_0402_1005Metric	R38
1	68k	R_0603_1608Metric	R40
1	13k	R_0603_1608Metric	R41
1	2.7k	R_0603_1608Metric	R44
1	9.1k	R_0603_1608Metric	R45
1	6.2k	R_0603_1608Metric	R47
1	18k	R_0603_1608Metric	R48
1	62k	R_0603_1608Metric	R49
1	150k	R_0603_1608Metric	R50
1	1.1	R_0402_1005Metric	R55

Hardware design files

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

Layoutmainboard/pcb/mainboard.kicad_pcb
Schematicmainboard/pcb/mainboard.kicad_sch
BOMshii/bom/bom.csv

Hardware: common questions

What microcontroller does the Hardware use?

The Hardware is built around the RP2350_80QFN, from the RP2040/RP2350 family.

How big is the Hardware PCB?

The Hardware measures 205.3 × 78 mm, has 4 copper layers and is 1.6062 mm thick.

How many components are on the Hardware?

172 components, from 77 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 Hardware design files?

From the seedhammer/hardware 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 Hardware design in my own project?

Yes, under the terms of its Unlicense license, which seedhammer chose for the repository.

Can I test firmware for the Hardware 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.