HardLabs

PicoSCSI

Mr-Bossman·picoSCSI·picoSCSI/picoSCSI.kicad_pcb

PicoSCSI PCB layout, top view — open source Raspberry Pi board by Mr-Bossman

About the PicoSCSI PCB

PicoSCSI is an open source Raspberry Pi PCB design by Mr-Bossman, published on GitHub. It is a 2-layer board measuring 100 × 90 mm, with 14 components from 10 distinct parts.

Its main chip is the RaspberryPi_Pico_W, from the Raspberry Pi family. By type, the board carries 5 resistors, 3 connectors, 3 diodes, 2 jumpers and 1 module.

From the project

A SD to Parallel SCSI hard drive emulator

The board design is lossely based on the BlueSCSI V1 and the ZuluSCSI Pico. The RP2350 the MCU on the Raspberry PI Pico 2 is 5V tollerant meaning no level translation logic is nessasary. Like BlueSCSI this outputs 3.3V to the bus, which is compliant with LV SCSI.

Coming soon will be based on ZuluSCSI firmware

Add both SMD and THT versions Add DB25 version Fix Pi Pico not having combined THT and SMD footprint

Main components on the PicoSCSI

RaspberryPi_Pico_W

PicoSCSI bill of materials (BOM)

14 components, 10 distinct parts.

QtyPartRefs
1
RaspberryPi_Pico_W
A1
1
SCSI_CONN
J1
1
Micro_SD_Card
J2
1
Floppy Power
J3
2
TERM_EN
JP1, JP4
1
POWER LED
D1
2
1N4001
D2, D3
1
1K
R1
2
220
RN1, RN2
2
330
RN3, RN4

PicoSCSI design files

The KiCad project lives in the Mr-Bossman/picoSCSI repository on GitHub; these links point at the commit this page was built from.

PicoSCSI: common questions

What microcontroller does the PicoSCSI use?

The PicoSCSI is built around the RaspberryPi_Pico_W, from the Raspberry Pi family.

How big is the PicoSCSI PCB?

The PicoSCSI measures 100 × 90 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the PicoSCSI?

14 components, from 10 distinct parts. The full bill of materials is listed on this page.

Where can I download the PicoSCSI design files?

From the Mr-Bossman/picoSCSI repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the PicoSCSI design in my own project?

The repository has no license, so all rights stay with Mr-Bossman. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the PicoSCSI without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Raspberry Pi firmware against it before you order a PCB.

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