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PicoGUS

polpo·picogus·hw/PicoGUS.kicad_pcb

PicoGUS PCB layout, top view — open source RP2040/RP2350 board by polpo
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About the PicoGUS PCB

PicoGUS is an open source RP2040/RP2350 PCB design by polpo, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 103.7 × 74.1 mm, with 46 components from 25 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the GHOST-20P, 74LVC244, 74FST3257DR2G, 74AHC14 and 74LVC00. By type, the board carries 20 capacitors, 11 ICs, 8 resistors, 4 connectors, 2 inductors and 1 diode.

It belongs with the audio and wearables designs in this gallery.

From the project

Emulation of ISA sound cards and CD-ROM on Raspberry Pi Pico (GUS, SB/Adlib, MPU-401, Tandy, CMS, Panasonic CD-ROM) with USB mouse/joystick support

ISA sound card and CD-ROM drive emulation on the Raspberry Pi Pico's RP2040 microcontroller. PicoGUS can emulate:

Gravis Ultrasound (GUS) - the primary focus of PicoGUS, hence the name Sound Blaster 16 (OPL3) / Sound Blaster Pro 2 (OPL3) / AdLib (OPL2) MPU-401 (with intelligent mode) - outputs MIDI data on 3.5mm MIDI TRS connector Tandy 3-voice CMS/Game Blaster Game port joystick * Panasonic/MKE CD-ROM

PicoGUS, from the project README
From the project README

Main components on the PicoGUS

PicoGHOST-20P74LVC24474FST3257DR2G74AHC1474LVC0074LVC1G00APS6404L-3SQR-SNPCM510074LVC2G06

PicoGUS bill of materials (BOM)

46 components, 25 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
Pico
U1
1
GHOST-20P
U1-R
1
74LVC244
U2
2
74FST3257DR2G
SN74CB3T3257
U3, U4
1
74AHC14
U5
1
74LVC00
U6
1
74LVC1G00
U7
1
APS6404L-3SQR-SN
U8
1
PCM5100
U9
1
74LVC2G06
U10
1
IRQDMA_JP
J1
2
SJ1-3535NG
J5, J8
1
Conn_01x02_Pin
J7
1
D_Schottky
D1
2
1KOhm @ 100MHz
FB1, FB2
2
47uF
C1, C2
12
0.1uF
C3, C4, C5, C6, C7, C8, C9, C11 +4
1
1uF
C10
1
10uF
C15
2
2.2uF
C16, C17
Show 5 more
QtyPartRefs
2
2.2nF
C19, C20
1
1K
R1
3
15K
R2, R5, R6
2
220
R3, R4
2
470
R7, R8

PicoGUS design files

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

PicoGUS: common questions

What microcontroller does the PicoGUS use?

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

How big is the PicoGUS PCB?

The PicoGUS measures 103.7 × 74.1 mm, has 2 copper layers and is 0.57 mm thick.

How many components are on the PicoGUS?

46 components, from 25 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 PicoGUS design files?

From the polpo/picogus 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 PicoGUS design in my own project?

Yes, under the terms of its GPL-2.0 license, which polpo chose for the repository.

Can I test firmware for the PicoGUS 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.

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