HardLabs

Digichiver

frindaddy·digichiver·Hardware/Digichiver.kicad_pcb

Digichiver PCB layout, top view — open source Raspberry Pi board by frindaddy

About the Digichiver PCB

Digichiver is an open source Raspberry Pi PCB design by frindaddy, published on GitHub under the MIT license. It is a 4-layer board measuring 96.9 × 88.1 mm, with 112 components from 38 distinct parts.

Its main chip is the RP2354B, from the Raspberry Pi family. Other key parts include the SN74LVC245APWR, SN74LVC8T245PWR, TLV61046A, TPSM84338 and PCM1809IRTER. By type, the board carries 54 capacitors, 36 resistors, 11 ICs, 3 connectors, 3 switches and 2 diodes.

It belongs with the audio designs in this gallery.

From the project

Archival hardware/firmware for the MM54104 Digitalker chip

The doc describes the digichicver circuit schematic (and PCB layout, when needed).

This sheet show the block diagram for the Digichiver board. The sheet is broken into 4 sections, the USB-C power/data connector, the Control block, the Digitalker block, the Audio block, and the Power block.

The USB-C connector is setup for a USB 2.0 full-speed connection, as that is the max capability of the RP2354B. Two $5.1k\Omega$ resistors tie CC1 and CC2 to ground to specify that this board is a power sink, per the USB specification. This advertises that this board can consume a maximum of 2.5W…

Main components on the Digichiver

RP2354BSN74LVC245APWRSN74LVC8T245PWRTLV61046ATPSM84338PCM1809IRTERTLV9004IPWRPAM8302AASCR

Digichiver bill of materials (BOM)

112 components, 38 distinct parts.

QtyPartRefs
1
RP2354B
U1
2
SN74LVC245APWR
SN74LVC245A
U2, U3
3
SN74LVC8T245PWR
SN74LVC8T245
U4, U5, U6
1
TLV61046A
U7
1
TPSM84338
U8
1
PCM1809IRTER
PCM1809
U9
1
TLV9004IPWR
U10
1
PAM8302AASCR
U11
1
ABM8-272-T3
X2
1
DM3AT-SF-PEJM5
J1
1
USB4105-GF-A
J2
1
SJ1-3535NG
J5
3
TS-1088-AR02016
SW1, SW2, SW3
1
KT-0805G
D1
1
KT-0805Y
D2
1
AOTA-B201610S3R3-101-T
3.3uH
L1
1
VLCF4020T-150MR68
15uH
L2
27
CL05B104KB54PNC
100nF
C1, C2, C3, C4, C5, C6, C7, C8 +19
2
0402CG150J500NT
15pF
C10, C11
4
CL05A475MP5NRNC
4.7uF
C12, C13, C14, C15
Show 18 more
QtyPartRefs
5
CL10A106MA8NRNC
10uF
C31, C37, C38, C39, C48
2
CL10A226MQ8NRNC
22uF
C32, C35
11
CL05A105KA5NQNC
1uF
C33, C36, C40, C41, C49, C50, C51, C52 +3
1
CL21A475KAQNNNE
4.7uF
C34
2
CL05B103KB5NNNC
10nF
C43, C44
12
0402WGF1002TCE
10k
R1, R2, R3, R4, R5, R12, R18, R28 +4
5
0402WGF1001TCE
1k
R6, R7, R10, R11, R13
2
0603WAF270JT5E
27
R8, R9
1
RC0402FR-07732KL
732k
R14
1
0402WGF1802TCE
18K
R15
1
RC0402FR-0771K5L
71.5k
R16
1
RC0402FR-0745K3L
45.3k
R17
2
0402WGF5101TCE
5.1k
R19, R20
4
0402WGF1003TCE
100k
R21, R22, R23, R36
2
0402WGF2201TCE
2.2k
R24, R25
2
0402WGF8201TCE
8.2k
R26, R27
1
0402WGF1500TCE
150
R33
2
0402WGF1000TCE
100
R34, R35

Digichiver design files

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

Digichiver: common questions

What microcontroller does the Digichiver use?

The Digichiver is built around the RP2354B, from the Raspberry Pi family.

How big is the Digichiver PCB?

The Digichiver measures 96.9 × 88.1 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Digichiver?

112 components, from 38 distinct parts. The full bill of materials is listed on this page.

Where can I download the Digichiver design files?

From the frindaddy/digichiver repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Digichiver design in my own project?

Yes, under the terms of its MIT license, which frindaddy chose for the repository.

Can I test firmware for the Digichiver 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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