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Flux gate 3 axis

JQIamo·flux_gate_3_axis·hardware/flux_gate_3_axis.kicad_pcb

Flux gate 3 axis PCB layout, top view — open source RP2040/RP2350 board by JQIamo

About the Flux gate 3 axis PCB

Flux gate 3 axis is an open source RP2040/RP2350 PCB design by JQIamo, published on GitHub. It is a 2-layer board measuring 44 × 51.1 mm, with 65 components from 22 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the DRV425, ADS124S06IRHBR, TPS22995RZFR and TPS7A2150. By type, the board carries 26 capacitors, 20 resistors, 8 ICs, 7 connectors and 4 inductors.

It belongs with the sensors designs in this gallery.

From the project

3-axis flux gate magnetic field sensor based on TI DRV425.

The repo includes the entire hardware and firmware of a 3-axis magnetic field sensor built upon a Raspberry Pico, featuring - 3 flux-gate magnetic field sensors (TI DRV425) and one ADC (TI ADS124S06) that is capable of - continuously measuring the magnetic field up to 4000 Hz (single channel), - with a designed RMS noise of 1.2 mG at 4000 Hz. - Power-over-Ethernet. - Both Serial and Ethernet (through the Web UI on board or WebSocket) interfaces are available for user interaction and data readout.

Flux gate 3 axis, from the project README
From the project README

Main components on the Flux gate 3 axis

PicoDRV425ADS124S06IRHBRTPS22995RZFRTPS7A2150

Flux gate 3 axis bill of materials (BOM)

65 components, 22 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
Pico
U1
3
DRV425
U2, U3, U5
1
ADS124S06IRHBR
U4
2
TPS22995RZFR
U6, U7
1
TPS7A2150
U8
2
CONN_02X04_ODD_EVEN
Conn_02x04_Odd_Even
J1, J2
2
CONN_02X04_ODD_EVEN
Conn_02x04_Odd_Even
J3, J6
3
CONN_01X02
Conn_01x02
J4, J5, J7
1
BLM31KN601SN1L
L1
1
0
L2
2
BLM15AX601SN1D
L3, L4
2
10 uF
C1, C2
1
DNP
C3
12
1 uF
C4, C6, C15, C16, C17, C18, C19, C20 +4
8
0.47 nF
C5, C8, C9, C11, C12, C14, C23, C25
3
4.7 nF
C7, C10, C13
5
47
R1, R2, R3, R4, R5
1
0
R6
3
10K
R7, R8, R9
3
24
R10, R11, R12
Show 2 more
QtyPartRefs
2
DNP
R13, R14
6
4.12K
4.12k
R15, R16, R17, R18, R19, R20

Flux gate 3 axis design files

The KiCad project lives in the JQIamo/flux_gate_3_axis repository on GitHub; these links point at the commit this page was built from.

Flux gate 3 axis: common questions

What microcontroller does the Flux gate 3 axis use?

The Flux gate 3 axis is built around the Pico, from the RP2040/RP2350 family.

How big is the Flux gate 3 axis PCB?

The Flux gate 3 axis measures 44 × 51.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Flux gate 3 axis?

65 components, from 22 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 Flux gate 3 axis design files?

From the JQIamo/flux_gate_3_axis 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 Flux gate 3 axis design in my own project?

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

Can I test firmware for the Flux gate 3 axis 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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