4 layers55.5 × 48 mm
4 layers20 × 38 mm
Duet3 SZP
Duet3D/Duet3-ScanningZProbe2The Duet 3 Scanning Z probe is a CAN-FD connected inductive sensing board, with compatible inductive PCB coils. It allows for a point mesh of the bed to be built up quickly as no movement in Z is required to read the bed distance, and individual readings happen very quickly.
- Size
- 20 × 38 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 81
- Nets
- 65
- Pads
- 278
- Tracks, vias
- 734, 99
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 26 Feb 2024
- Updated
- 22 Sep 2025
Overview
Duet3 SZP is an open-source printed circuit board by Duet3D, from the Duet3D/Duet3-ScanningZProbe repository on GitHub. It is a 4-layer board of 20 × 38 mm with 81 parts on 65 nets, routed with 734 tracks and 99 vias.
It is built around the ATSAMC21G18A-AU, PA01 and LDK130M25R, with the LIS2DW12, MCP2542FD and BAT54CW among its other parts. Its parts include 21 capacitors, 20 resistors, 6 ICs, 3 diodes and 2 connectors. It belongs with the SAM D and SAM boards of this library.
Main components
6
ATSAMC21G18A-AU
TQFP-48(7x7)-40℃~+85℃ 10bit 12bit、16bit 2.7V~5.5V 256KB 32 Bit 32KB 38 48MHz ARM Cortex-M0+ Built-in FLASH TQFP-48(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)PA01
--25℃~+85℃ 10uV/℃ 110dB 12nA 15nA 2.6V/us 20mA 5mV Built-in compensation - Operational Amplifier ROHSApex MicrotechnologyOperational Amplifier
LDK130M25R
SOT-23-5L-40℃~+125℃@(Tj) 1 2.5V 200mV@(300mA) 300mA 30uA 5.5V 51uVrms 55dB@(10kHz) Fixed Over Current Protection、Over Temperature Protection Positive SOT-23-5L Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSSTMicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
LIS2DW12
LGA-12(2x2)-40℃~+85℃ 1.62V~3.6V 16bit 50nA Accelerometer Motion event detection SPI、I2C X,Y,Z ±16g LGA-12(2x2) Accelerometers ROHSSTMicroelectronicsAccelerometersMCP2542FD
UncategorisedMicrochip Technology
BAT54CW
SOT-323-3-65℃~+125℃ 1 Pair Common Cathode 1V@100mA 200mA 2uA@25V 30V 600mA SOT-323-3 Schottky Diodes ROHSDiodes IncorporatedSchottky Diodes
README
README.mdDuet3-ScanningZProbe
The Duet 3 Scanning Z probe is a CAN-FD connected inductive sensing board, with compatible inductive PCB coils. It allows for a point mesh of the bed to be built up quickly as no movement in Z is required to read the bed distance, and individual readings happen very quickly.
Product Page: https://www.duet3d.com/Duet3ScanningZProbe
Documentation is here:
Duet 3 Scanning Z Probe Documentation
licensed under the "CERN-OHL-S v2" or any later version plus the "Additional Duet3D Licence Terms", see https://github.com/Duet3D/Duet3-Mainboard-6HC/blob/master/LICENSE
Parts
81| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 0u1 10V 10% X7R | Capacitor_SMD:C_0402_1005Metric_Wbry | C5, C6, C7, C8, C9, C11, C18, C20, C22 |
| 6 | 1u 10V 10% X7R | Capacitor_SMD:C_0402_1005Metric_Wbry | C4, C12, C14, C15, C17, C21 |
| 4 | 10K 1% 0.1W | Resistor_SMD:R_0402_1005Metric_Wbry | R2, R8, R15, R23 |
| 4 | 4K7 1% 0.063W | Resistor_SMD:R_0402_1005Metric_Wbry | R3, R9, R11, R16 |
| 3 | MOUNTING | MountingHole:MountingHole_2.2mm_M2_Pad | M1, M3, M4 |
| 2 | 100K 1% 0.063W | Resistor_SMD:R_0402_1005Metric_Wbry | R7, R17 |
| 2 | 10n 10V 10% X7R | Capacitor_SMD:C_0402_1005Metric_Wbry | C13, C16 |
| 2 | 10u 10V 10% X7R | Capacitor_SMD:C_0805_2012Metric | C3, C10 |
| 2 | 1K 1% 0.063W | Resistor_SMD:R_0402_1005Metric_Wbry | R1, R10 |
| 2 | 22p 16V 5% C0G,NP0 | Capacitor_SMD:C_0402_1005Metric_Wbry | C1, C2 |
| 2 | 2K4 1% 0.063W | Resistor_SMD:R_0402_1005Metric_Wbry | R6, R20 |
| 1 | 120R 1% 0.063W | Resistor_SMD:R_0402_1005Metric_Wbry | R21 |
| 1 | 180R 1% 0.063W | Resistor_SMD:R_0402_1005Metric_Wbry | R4 |
| 1 | 22K 1% 0.1W | Resistor_SMD:R_0402_1005Metric_Wbry | R14 |
| 1 | 2K2 0.1% 0.2W | Resistor_SMD:R_0603_1608Metric_Wbry | R18 |
| 1 | 470R 1% 0.063W | Resistor_SMD:R_0402_1005Metric_Wbry | R22 |
| 1 | 5V | TestPoint:TestPoint_Pad_D1.5mm | TP3 |
| 1 | 7K5 1% 0.063W | Resistor_SMD:R_0402_1005Metric_Wbry | R19 |
| 1 | ACT | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | AP7366-W5-7 | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | ATSAMC21G18A | Package_DFN_QFN:QFN-48-1EP_7x7mm_P0.5mm_EP5.2x5.2mm_ThermalVias_thinpads | U1 |
| 1 | BAT54CW | Package_TO_SOT_SMD:SOT-323_SC-70 | D3 |
| 1 | CA | TestPoint:TestPoint_Pad_D1.5mm | TP16 |
| 1 | CAN & POWER | complib:JST_PA_SM04B-PASS_1x04-1MP_P2.00mm_Horizontal | J2 |
| 1 | CAN RESET | Button_Switch_SMD:SW_SPST_CK_KXT3 | SW1 |
| 1 | CAN Termination | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | CANH/TX | Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm | JP4 |
| 1 | CANL/RX | Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm | JP3 |
| 1 | CB | TestPoint:TestPoint_Pad_D1.5mm | TP15 |
| 1 | CM Choke | complib:Wurth_CM_Choke_1812_744235nnn | L2 |
| 1 | Coil & Temp | complib:FFC-4S-0.5SH_1x04-1MP_P0.50mm_Horizontal | J3 |
| 1 | Duet3D_Logo | complib:LOGO_NEW_Duet3D_teardrop | M5 |
| 1 | FID | Fiducial:Fiducial_1mm_Mask2mm | M0 |
| 1 | Ferrite Bead | Inductor_SMD:L_0402_1005Metric | L1 |
| 1 | GND | TestPoint:TestPoint_Pad_D1.5mm | TP5 |
| 1 | GNDANA-GND NET TIE | NetTie:NetTie-2_SMD_Pad0.5mm | NT1 |
| 1 | H | TestPoint:TestPoint_Pad_D1.5mm | TP9 |
| 1 | L | TestPoint:TestPoint_Pad_D1.5mm | TP12 |
| 1 | LDC1612 | Package_SON:WSON-12-1EP_4x4mm_P0.5mm_EP2.6x3mm_ThermalVias | U2 |
| 1 | LDK130M25R | Package_TO_SOT_SMD:SOT-23-5 | U6 |
| 1 | LIS2DW12 | Package_LGA:LGA-12_2x2mm_P0.5mm | U5 |
| 1 | MCP2542 | Package_DFN_QFN:DFN-8-1EP_3x2mm_P0.5mm_EP1.3x1.5mm-thinpads | U4 |
| 1 | PA00 | TestPoint:TestPoint_Pad_D1.5mm | TP7 |
| 1 | PA01 | TestPoint:TestPoint_Pad_D1.5mm | TP8 |
| 1 | PA11 | TestPoint:TestPoint_Pad_D1.5mm | TP10 |
| 1 | PA27 | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | TP6 |
| 1 | PA28 | TestPoint:TestPoint_Pad_D1.5mm | TP11 |
| 1 | RESET | TestPoint:TestPoint_Pad_D1.5mm | TP4 |
| 1 | STATUS | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | SWDCLK | TestPoint:TestPoint_Pad_D1.5mm | TP2 |
| 1 | SWDIO | TestPoint:TestPoint_Pad_D1.5mm | TP1 |
| 1 | TSX-3225 25.0000MF10P | complib:Crystal_SMD_ECS-33B-4Pin_3.2x2.5mm | X1 |
| 1 | Temp | TestPoint:TestPoint_Pad_D1.5mm | TP13 |
| 1 | VSSA | TestPoint:TestPoint_Pad_D1.5mm | TP14 |
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Questions
How big is the Duet3 SZP PCB?
It measures 20 × 38 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Duet3 SZP use?
81 parts, built around the ATSAMC21G18A-AU, PA01, LDK130M25R and LIS2DW12. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Duet3 SZP KiCad files?
From the Duet3D/Duet3-ScanningZProbe repository on GitHub, at the commit this page was made from: the board is v1.0/Duet3_SZP.kicad_pcb and its schematic v1.0/Duet3_SZP.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Duet3 SZP design in my own project?
Its repository states no licence, so its author keeps all rights: ask Duet3D before reusing the design.