https://wiki.jw-tech.eu/index.php?action=history&feed=atom&title=WSAL15669_%E2%80%93_Stepper_Motor_HAT%2FenWSAL15669 – Stepper Motor HAT/en - Versionsgeschichte2026-10-23T22:04:07ZVersionsgeschichte dieser Seite in JW Tech WikiMediaWiki 1.43.9https://wiki.jw-tech.eu/index.php?title=WSAL15669_%E2%80%93_Stepper_Motor_HAT/en&diff=1192&oldid=prevJWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex2026-09-05T22:24:52Z<p>Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex</p>
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'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.<br />
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== Summary ==<br />
The Stepper Motor HAT is a Raspberry Pi expansion board that drives two bipolar stepper motors via integrated DRV8825 drivers. It offers six microstep modes (full-step through 1/32-step), adjustable output current up to 2.5 A, and an onboard power supply capable of up to 3 A output current.<br />
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== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/WSAL15669 WSAL15669 – Stepper Motor HAT for Raspberry Pi, Drives Two Stepper Motors]<br />
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== Technical overview ==<br />
* Compatible with Raspberry Pi Zero, Zero W, Zero WH, 2B, 3B, 3B+, 4B and 5.<br />
* Two integrated DRV8825 driver ICs, each controlling one stepper motor.<br />
* Microstep setting via DIP switches D0–D5: D0–D2 control motor M1, D3–D5 control motor M2; modes: full-step, half-step, 1/4-, 1/8-, 1/16- and 1/32-step.<br />
* Driver input voltage range: 8.2 V to 28 V; the MP1584 regulator supports 4.5 V to 28 V input but delivers up to 3 A output.<br />
* Output current per driver up to 2.5 A, adjustable via potentiometer; sense resistors R13/R16 at 0.2 Ω set the current using the formula Ichop = Vref/(5·R(ISENSE)).<br />
* Motor connection uses XH2.54 4P connectors; pins A1/A2/B1/B2 belong to M1, A3/A4/B3/B4 to M2.<br />
* nENBL must be held low to enable the H-bridge output; when high, the bridge is disabled and STEP is ignored.<br />
* Board measures 65 mm × 56 mm, through-hole diameter 3.0 mm.<br />
* For software microstepping, six resistors must be soldered on the back and all DIP switches set to 1; default is hardware setting via the DIP switches.<br />
* The system operates in open-loop mode without position feedback; the drive follows only the pulse count from the microcontroller.<br />
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== Notes and version constraints ==<br />
* Overloading above 2.5 A without additional cooling can damage the driver chip; it is recommended to respect the phase-current limit or add a fan.<br />
* The exact mapping of DIP switch positions to individual microstep modes is incompletely reproduced in the source (the table “see datasheet page 13” is missing); verify the correct setting in the datasheet before use.<br />
* The exact command strings for programming are not fully present in the source; only general hints such as 'softward' (Python) and SOFTWARD (C) are given.<br />
* The current formula assumes a known potentiometer voltage; without measurement the actual output current cannot be determined reliably.<br />
* The compatibility list refers to the listed Pi models; newer or other boards require separate verification.<br />
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== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/Stepper_Motor_HAT Stepper Motor HAT - Waveshare Wiki]<br />
* Source revision: 110204<br />
* Captured: 2026-08-31T02:56:08+00:00<br />
* SHA-256: <code>0f1e392cc16c9957334df12c1c9f9d9d903d7176fb2c2e330202bcfe43da31db</code></div>JWTechPublisher