Simple stepper motor analyzer

zapta·simple_stepper_motor_analyzer·kicad/stepper_analyzer.kicad_pcb

About the Simple stepper motor analyzer PCB

Simple stepper motor analyzer is an open source RP2040/RP2350 PCB design by zapta, published on GitHub under the Custom license license. It is a 2-layer board measuring 102 × 57 mm, with 18 components from 12 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the ACS70331EOLCTR-2P5B3. By type, the board carries 5 resistors, 3 ICs, 3 capacitors, 2 connectors, 1 module and 1 transistor.

It belongs with the robotics & motion designs in this gallery.

From the project

A DYI stepper motor analyzer. This is a new design that is based on Raspberry Pi Pico and users a compact single PCB design. NOTE: The legacy STM32 based stepper analyzer was moved to this repository https://github.com/zapta/legacy_stepper_motor_analyzer.

Main components on the Simple stepper motor analyzer

ACS70331EOLCTR-2P5B3 Pico

Simple stepper motor analyzer bill of materials (BOM)

18 components, 12 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
2	ACS70331EOLCTR-2P5B3	SOIC-8_3.9x4.9mm_P1.27mm	U1, U2
1	Pico	Pico_smd_dedicated	U3
1	Motor	null_footprint	M1
1	AO3400A	SOT-23	Q1
2	Connector_Conn_01x04_Male	connector_4pins_horizontal	J1, J2
1	Connector_Conn_01x40_Female	JUSHUO-AFC07-S40ECC-00_40P_05mm_flipped	FPC1
1	FPC connector, 6 pins, 0.5mm, BOTTOM contacts	JUSHUO-AFC01-S06FCC-00_6p_05mm	FPC2
1	TestPoint	testpoint_double_side	TP3
2	0.1u	C_0805_2012Metric_Pad1.15x1.40mm_HandSolder	C1, C2
1	10u	C_0805_2012Metric_Pad1.15x1.40mm_HandSolder	C3
3	8R2	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R1, R2, R3
2	DNP	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder_no_3d	R4, R5

Simple stepper motor analyzer design files

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

Layoutkicad/stepper_analyzer.kicad_pcb
BOMkicad/BOM.xlsx

Simple stepper motor analyzer: common questions

What microcontroller does the Simple stepper motor analyzer use?

The Simple stepper motor analyzer is built around the Pico, from the RP2040/RP2350 family.

How big is the Simple stepper motor analyzer PCB?

The Simple stepper motor analyzer measures 102 × 57 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Simple stepper motor analyzer?

18 components, from 12 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 Simple stepper motor analyzer design files?

From the zapta/simple_stepper_motor_analyzer repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Simple stepper motor analyzer design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Simple stepper motor analyzer 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.