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Harp.device.PhotodiodeBoard

AllenNeuralDynamics·harp.device.PhotodiodeBoard·hardware/board/0374 Production Board/0374 Production Board.kicad_pcb

Harp.device.PhotodiodeBoard PCB layout, top view — open source RP2040/RP2350 board by AllenNeuralDynamics

About the Harp.device.PhotodiodeBoard PCB

Harp.device.PhotodiodeBoard is an open source RP2040/RP2350 PCB design by AllenNeuralDynamics, published on GitHub. It is a 4-layer board measuring 38 × 53 mm, with 61 components from 32 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the TPD2EUSB30, LP2985-3.3, W25Q16JVUXIQ, AD8656 and REF2033AIDDCR. By type, the board carries 25 capacitors, 12 resistors, 7 ICs, 5 connectors, 5 diodes and 3 test points.

From the project

0374: Harp photodiode board with automated comparator calibration and gamma calibration developed by SIPE.

These schematic and layout designs have been vetted on prior devices.

High Level Specs: USBC connector (ESD protected with TVS diode). Audio jack connector for Harp synchronization signal (ESD protected with TVS diode).

Component Specs: aqueous washable commonly available components (no end-of-life or last-time-buy)

Layout Specs: 4-layer PCB signal (top), ground, power, signal (bottom) 6-mil traces, 6-mil spacing (0.1524mm) no microvias smallest resistor/capacitor sizes are 0402. Footprints default to "non-hand-soldering"-style.

Main components on the Harp.device.PhotodiodeBoard

TPD2EUSB30LP2985-3.3RP2040W25Q16JVUXIQAD8656REF2033AIDDCROptocoupler_DC_PhotoNPN_AKEC

Harp.device.PhotodiodeBoard bill of materials (BOM)

61 components, 32 distinct parts.

QtyPartRefs
1
TPD2EUSB30
Texas Instruments
U1
1
LP2985-3.3
Texas Instruments
U2
1
RP2040
Raspberry Pi
U3
1
W25Q16JVUXIQ
Winbond Electronics
U4
1
AD8656
Analog Devices Inc.
U5
1
REF2033AIDDCR
Texas Instruments
U6
1
Optocoupler_DC_PhotoNPN_AKEC
Lite-On Inc.
U7
1
ECS-TXO-2016
ECS Inc.
X1
1
Conn_01x04_Pin
3M
J1
1
AudioJack3
J2
1
USB_C_Receptacle_USB2.0
JAE Electronics
J3
2
~
J4, J5
2
BPW21R
Vishay Semiconductor Opto Division
CR1, CR2
1
~
Würth Elektronik
SW2
3
TestPoint
TP1, TP2, TP3
2
D_TVS
onsemi
D1, D2
2
LED
SunLED
D3, D4
1
BAT54J
MCC (Micro Commercial Components)
D5
15
100nF
Walson Technology Corporation
C1, C2, C6, C8, C13, C14, C15, C16 +7
2
10pF
KEMET
C3, C5
Show 12 more
QtyPartRefs
2
10nF
Murata Electronics
C4, C21
4
1uF
KYOCERA AVX
C9, C10, C11, C22
1
10uF
Cal-Chip Electronics, Inc.
C12
1
2.2uF
Cal-Chip Electronics, Inc.
C23
1
1K
Yageo
R1
2
5K1
Yageo
R2, R3
1
487
Vishay Dale
R4
1
4.7k
YAGEO
R5
2
390k
R6, R7
1
10K
KOA Speer Electronics, Inc.
R8
2
27
Yageo
R9, R10
2
330
Panasonic Electronic Components
R11, R12

Harp.device.PhotodiodeBoard design files

The KiCad project lives in the AllenNeuralDynamics/harp.device.PhotodiodeBoard repository on GitHub; these links point at the commit this page was built from.

Harp.device.PhotodiodeBoard: common questions

What microcontroller does the Harp.device.PhotodiodeBoard use?

The Harp.device.PhotodiodeBoard is built around the RP2040, from the RP2040/RP2350 family.

How big is the Harp.device.PhotodiodeBoard PCB?

The Harp.device.PhotodiodeBoard measures 38 × 53 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Harp.device.PhotodiodeBoard?

61 components, from 32 distinct parts. The full bill of materials is listed on this page.

Where can I download the Harp.device.PhotodiodeBoard design files?

From the AllenNeuralDynamics/harp.device.PhotodiodeBoard repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Harp.device.PhotodiodeBoard design in my own project?

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

Can I test firmware for the Harp.device.PhotodiodeBoard 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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