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BondTest72

szfate·BondTest72

BondTest72 PCB layout, top view — open source RP2040/RP2350 board by szfate

About the BondTest72 PCB

BondTest72 is an open source RP2040/RP2350 PCB design by szfate, published on GitHub. It is a 4-layer board measuring 80 × 90 mm, with 34 components from 17 distinct parts.

Its main chip is the C41407547, from the RP2040/RP2350 family. Other key parts include the C356724 and C3018882. By type, the board carries 17 capacitors, 5 resistors, 4 ICs, 3 connectors, 2 switches and 2 diodes.

From the project

BondTest72 mainboard design files

Production test fixture board for bond wire testing, controlled by a Raspberry Pi Pico. Test signals are routed through CH446X analog crosspoint switches to two 41-pin connectors, on which a replaceable adapter board sits. The adapter board carries the DUT connector and any auxiliary components, keeping the main tester board from wearing out.

The board is powered from the Pico's USB VBUS rail. The TPS7A0533 LDO provides an optional quiet +3.3VADC rail as an alternative ADC reference, in case the main +3.3V rail from the Pico's onboard DCDC is too noisy. In practice the application only…

BondTest72, from the project README
From the project README

Main components on the BondTest72

C356724C3018882C41407547

BondTest72 bill of materials (BOM)

34 components, 17 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
C356724
ICL7660
U1
3
C3018882
CH446X
U2, U3, U4
1
C41407547
RaspberryPi_Pico
A1
1
CONN_01X07
Conn_01x07
J1
2
C432807
Conn_2Rows-41Pins_MountingPin
J3, J4
1
C713484
SW_Push
SW1
1
C4365008
SW_Push
SW2
2
C5378720
SK6812
D1, D2
11
C76939
100n
C20, C21, C22, C23, C24, C25, C39, C45 +3
2
C307385
1u
C40, C41
3
C9807
10u
C42, C43, C44
1
C307385
120pF
C50
1
C273316
27.4K
R11
1
C851701
2.49k
R12
1
C778392
280k
R13
1
C4066408
10k
R14
1
C4066408
100k
R15

BondTest72 design files

The KiCad project lives in the szfate/BondTest72 repository on GitHub; these links point at the commit this page was built from.

BondTest72: common questions

What microcontroller does the BondTest72 use?

The BondTest72 is built around the C41407547, from the RP2040/RP2350 family.

How big is the BondTest72 PCB?

The BondTest72 measures 80 × 90 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the BondTest72?

34 components, from 17 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 BondTest72 design files?

From the szfate/BondTest72 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 BondTest72 design in my own project?

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

Can I test firmware for the BondTest72 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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