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PicoGUS chipdown

polpo·picogus·hw-chipdown/PicoGUS chipdown.kicad_pcb

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

PicoGUS chipdown is an open source RP2040/RP2350 PCB design by polpo, published on GitHub under the GPL-2.0 license. It is a 4-layer board measuring 102.9 × 96.7 mm, with 92 components from 45 distinct parts.

Its main chip is the W25Q128JVS, from the RP2040/RP2350 family. Other key parts include the 74FST3257DR2G, 74AHC14, 74LVC00, 74LVC2G06 and SN74CB3T3245. By type, the board carries 45 capacitors, 18 resistors, 13 ICs, 6 connectors, 4 inductors and 2 diodes.

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 chipdown, from the project README
From the project README

Main components on the PicoGUS chipdown

74FST3257DR2G74AHC1474LVC0074LVC2G06SN74CB3T3245APS6404L-3SQR-SNAMS1117-3.3_SOT223PCM5100W25Q128JVSRP2040M62429L

PicoGUS chipdown bill of materials (BOM)

92 components, 45 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
74FST3257DR2G
SN74CB3T3257
U1, U2
1
74AHC14
U3
2
74LVC00
U4, U5
1
74LVC2G06
U6
1
SN74CB3T3245
U7
1
APS6404L-3SQR-SN
U8
1
AMS1117-3.3_SOT223
U9
1
PCM5100
U10
1
W25Q128JVS
U11
1
RP2040
U12
1
M62429L
U13
1
AO3401A
Q1
1
ABLS-12.000MHZ-B4-T
Y1
1
C492426
IRQDMA_JP
J3
1
C2345
USB_A - joy
J5
1
C397452
USB_B_Micro - program
J6
1
C2910528
3.5mm TRS
J7
1
C358701
Wavetable
J8
1
C692438
3.5mm TRS
J9
1
C75464
Polyfuse
F1
Show 25 more
QtyPartRefs
1
SW_Push
SW1
1
LED
D1
1
C191023
D_Schottky
D2
2
C155073
1KΩ@100MHz
FB1, FB2
2
C1015
100Ω@100MHz
FB3, FB4
2
47UF
47uF
C1, C11
13
0.1UF
0.1uF
C2, C3, C4, C5, C6, C7, C8, C9 +5
1
1UF
1uF
C10
2
10U
10u
C12, C13
1
10U
10uF
C17
2
2.2UF
2.2uF
C18, C19
2
2.2NF
2.2nF
C21, C22
1
0.1UF
100nF
C23
2
30PF
30pF
C24, C25
10
0.1UF
100n
C26, C27, C28, C30, C32, C33, C34, C35 +2
2
1u
C29, C31
1
47UF
100uF
C38
6
2.2UF
2.2uF
C39, C40, C41, C42, C43, C44
2
10K
R1, R5
2
220
R2, R3
5
1K
R4, R6, R7, R8, R9
3
470
R10, R11, R13
2
1k
R12, R14
2
27
R15, R16
2
15K
R17, R18

PicoGUS chipdown 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 chipdown: common questions

What microcontroller does the PicoGUS chipdown use?

The PicoGUS chipdown is built around the W25Q128JVS, from the RP2040/RP2350 family.

How big is the PicoGUS chipdown PCB?

The PicoGUS chipdown measures 102.9 × 96.7 mm, has 4 copper layers and is 1.6062 mm thick.

How many components are on the PicoGUS chipdown?

92 components, from 45 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 chipdown 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 chipdown 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 chipdown 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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