Ethoscope stepper controller 3x3
janelia-kicad·ethoscope_stepper_controller_3x3
About the Ethoscope stepper controller 3x3 PCB
Ethoscope stepper controller 3x3 is an open source NXP PCB design by janelia-kicad, published on GitHub under the Custom license license. It is a 2-layer board measuring 74.9 × 74.9 mm, with 71 components from 15 distinct parts.
Its main chip is the TEENSY_3.5_MIN, from the NXP family. Other key parts include the TMC429, BUFFER_TRI_STATE and DRV8846. By type, the board carries 25 capacitors, 17 resistors, 13 ICs, 7 transformers, 2 inductors and 1 connector.
It belongs with the robotics & motion designs in this gallery.
From the project
This device controls the 7 stepper motors on the fly ethoscope rig.
- Repository Information - Description - Images - Schematic - Gerbers - Bill of Materials - PCB Parts - Supplemental Parts - Vendor Parts Lists - Supplemental Documentation - Assembly Instructions
- Name: ethoscope\stepper\controller\3x3 - Version: 1.2 - License: Open-Source Hardware - URL: - Author: Peter Polidoro - Email:** peter@polidoro.io
This device controls the 7 stepper motors on the fly ethoscope rig.

Main components on the Ethoscope stepper controller 3x3
Ethoscope stepper controller 3x3 bill of materials (BOM)
71 components, 15 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | TMC429 | QFN-5x5-32 | U1, U6, U11 |
| 3 | BUFFER_TRI_STATE | SOT-23-5 | U2, U7, U12 |
| 7 | DRV8846 | VQFN-4x4-24 | U3, U4, U5, U8, U9, U10, U13 |
| 1 | PWR_JACK_2.1x5.5_SMD_VERT | DCJACK_3PIN_SMD_VERT | P1 |
| 1 | CLK_32MHZ | CTS_SMD_4_7X5MM | CLK1 |
| 4 | MOUNT_HOLE | MOUNTING_HOLE_4-40 | MH1, MH2, MH3, MH4 |
| 7 | TERM_BLK_HDR_4POS_VERT_0.138IN | TERM_BLK_HDR_4POS_VERT_0.138IN | T1, T2, T3, T4, T5, T6, T7 |
| 1 | TEENSY_3.5_MIN | TEENSY_3.5_MIN | TEENSY1 |
| 1 | LED_24V_RED | LED_555-3XXX_R | L1 |
| 1 | LED_5V_GRN | LED_555-3XXX_G | L2 |
| 11 | 0.1uF | SM0402 | C1, C2, C3, C6, C9, C12, C13, C16 +3 |
| 7 | 10uF | SM0805 | C4, C7, C10, C14, C17, C20, C24 |
| 7 | 2.2uF | SM0402 | C5, C8, C11, C15, C18, C21, C25 |
| 3 | 10.0k | SM0402 | R1, R8, R15 |
| 14 | 2.2 | SM0402 | R2, R3, R4, R5, R6, R7, R9, R10 +6 |
Ethoscope stepper controller 3x3 design files
The KiCad project lives in the janelia-kicad/ethoscope_stepper_controller_3x3 repository on GitHub; these links point at the commit this page was built from.
Ethoscope stepper controller 3x3: common questions
What microcontroller does the Ethoscope stepper controller 3x3 use?
The Ethoscope stepper controller 3x3 is built around the TEENSY_3.5_MIN, from the NXP family.
How big is the Ethoscope stepper controller 3x3 PCB?
The Ethoscope stepper controller 3x3 measures 74.9 × 74.9 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Ethoscope stepper controller 3x3?
71 components, from 15 distinct parts. The full bill of materials is listed on this page.
Where can I download the Ethoscope stepper controller 3x3 design files?
From the janelia-kicad/ethoscope_stepper_controller_3x3 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Ethoscope stepper controller 3x3 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 Ethoscope stepper controller 3x3 without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug NXP firmware against it before you order a PCB.
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