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Tesseract

hridcode·tesseract·source/pcb/tesseract.kicad_pcb

Tesseract PCB layout, top view — open source Raspberry Pi board by hridcode
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About the Tesseract PCB

Tesseract is an open source Raspberry Pi PCB design by hridcode, published on GitHub. It is a 4-layer board measuring 65 × 100 mm, with 82 components from 37 distinct parts.

Its main chip is the RP2354A, from the Raspberry Pi family. Other key parts include the C107671, C181692, C5446 and PAM8403D. By type, the board carries 43 capacitors, 18 resistors, 6 ICs, 5 connectors, 5 switches and 2 speakers.

It belongs with the audio, displays & leds and power & battery designs in this gallery.

From the project

Tesseract is a retro-style MP3 player with 32-bit stereo output to speakers and headphones, an LCD display, and battery charging for on-the-go listening.

Tesseract is a retro-style MP3 player with audio output to speakers and headphones, an LCD display, and battery charging for on-the-go listening. I made this because I wanted to have a dedicated device to run a library of my favorite music in a simplistic way, as a sort of action against streaming services.

- 32-bit 48kHz stereo output to speakers and headphones - microSD card file loading (up to 32GB) - 2.0" LCD display (ST7789) - Battery charging with power path - Album and artist shuffling modes - Genre tags

Tesseract, from the project README
From the project README

Main components on the Tesseract

C107671C181692RP2354AC5446PAM8403D

Tesseract bill of materials (BOM)

82 components, 37 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
C107671
PCM5102A
U1
1
C181692
IP5306
U2
1
RP2354A
U3
1
C5446
XC6206PxxxMR
U4
1
PAM8403D
U5
1
~
U6
1
C9002
Crystal_GND24
Y1
1
C165948
USB_C_Receptacle_USB2.0_14P
J1
1
AudioJack3_SwitchTR
J2
1
Conn_01x12
J3
1
Conn_01x02
J4
1
Micro_SD_Card_Det1
J5
2
Speaker
LS1, LS2
2
SW_Push
SW1, SW2
2
SW_Push
SW3, SW4
1
SW_SPDT
SW5
1
C84474
3.3uH
L1
1
C84468
1uH
L2
3
C23733
4.7uF
C1, C2, C3
2
C1554
20pF
C4, C5
Show 17 more
QtyPartRefs
16
C1525
0.1uF
C6, C7, C8, C12, C13, C14, C15, C16 +8
10
C15525
10uF
C9, C10, C23, C24, C25, C26, C30, C31 +2
3
C59461
22uF
C11, C21, C22
4
C12530
2.2uF
C35, C36, C37, C38
2
C1525
0.47uF
C39, C40
1
0.1uF
C41
1
1uF
C42
1
C15525
0.1uF
C43
2
C25905
5.1K
R1, R2
2
C25190
27
R3, R4
1
C25105
33
R5
2
C11702
1K
R6, R7
2
C22977
2
R8, R9
2
C25117
470
R10, R11
2
C25190
20K
R12, R13
1
C11702
10
R14
4
C11702
10K
R15, R16, R17, R18

Tesseract design files

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

Tesseract: common questions

What microcontroller does the Tesseract use?

The Tesseract is built around the RP2354A, from the Raspberry Pi family.

How big is the Tesseract PCB?

The Tesseract measures 65 × 100 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Tesseract?

82 components, from 37 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 Tesseract design files?

From the hridcode/tesseract 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 Tesseract design in my own project?

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

Can I test firmware for the Tesseract 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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