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Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

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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.

== Summary ==
The Servo Driver HAT adds 16 PWM/servo channels to a Raspberry Pi via the I2C interface. Control is handled by the PCA9685 driver IC with 12-bit resolution per channel.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL15275 WSAL15275 – Servo Driver HAT for Raspberry Pi, 16-Channel, 12-bit, I2C]
* [https://shop.jw-tech.eu/p/WSAL17035 WSAL17035 – Servo Driver HAT (B) for Raspberry Pi, 16-Channel, 12-bit, I2C]

== Technical overview ==
* Controlled over I2C; no extra GPIO pins required
* 16 channels, each with 12-bit resolution
* Input supply: 6 V to 12 V at the green VIN terminal block
* Logic voltage: 3.3 V; servo input voltage: 5 V
* Dimensions: 65 mm × 30 mm; mounting hole diameter 3.0 mm
* Jumpers A0–A4 select the PCA9685 I2C device address; different combinations allow multiple modules in parallel
* Top pin headers: black = GND, red = 5 V, yellow = PWM signal
* Maximum output current of the onboard regulator: 3 A
* Compatible platforms per source: Raspberry Pi, Jetson Nano, VisionFive2

'''Commands and examples – verify before use:'''
<syntaxhighlight lang="text">
sudo raspi-config
sudo reboot
sudo apt-get update
sudo apt-get install python-pip
sudo pip install RPi.GPIO
sudo apt-get install python-smbus
sudo apt-get install p7zip-full
wget https://www.waveshare.com/w/upload/6/6c/Servo_Driver_HAT.7z
7zr x Servo_Driver_HAT.7z -r -o./Servo_Driver_HAT
sudo chmod 777 -R Servo_Driver_HAT
cd Servo_Driver_HAT/Raspberry\ Pi/
cd python/
sudo python PCA9685.py
cd python3/
sudo python3 PCA9685.py
cd Wifi-Control/
sudo python main.py
sudo apt-get install pi-bluetooth bluez bluez-firmware blueman
sudo usermod -G bluetooth -a pi
sudo vi /etc/systemd/system/dbus-org.bluez.service
</syntaxhighlight>

== Notes and version constraints ==
* When driving high-power servos, the Raspberry Pi's 5 V supply may be insufficient; remove the 0-ohm resistor and connect external 6–12 V to VIN
* Precise angular positioning is only entry-level; highly accurate angle jumps are not guaranteed
* If you observe jitter, squeaking or overheating, it is usually mechanical wear of the internal potentiometer
* When stacking multiple modules, set jumpers A0–A4 so each unit gets a unique I2C address
* Default Bluetooth discovery time is only 180 s; persistent discovery requires edits to /etc/bluetooth/main.conf
* Some steps depend on the exact hardware revision (HAT vs HAT (B)) and may need manual confirmation

== Source and revision record ==
* [https://www.waveshare.com/wiki/Servo_Driver_HAT Servo Driver HAT - Waveshare Wiki]
* Source revision: 79075
* Captured: 2026-08-31T02:46:23+00:00
* SHA-256: <code>3e6d6ebae2d4abf603c2f9727821bf5fa94ae80ebe0c4fdc7fdb4bd9cbe68fab</code>

WSAL15275 – Servo Driver HAT/en - Versionsgeschichte

JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex