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Servo Expansion for Onion Omega2
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Add 16 independent PWM outputs to your Onion Omega2 for controlling servos, DC motors, and LED brightness. The onboard 3-pin connectors let you plug in stand...
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Add 16 independent PWM outputs to your Onion Omega2 for controlling servos, DC motors, and LED brightness. The onboard 3-pin connectors let you plug in standard servos directly – no breadboard or extra wiring needed.
The built-in oscillator generates free-running PWM signals from 24Hz to 1526Hz. Once configured, signals continue without further commands, freeing your Omega for other tasks. Each channel can be set independently or all at once.
Key Features
- 16 PWM Channels – Control multiple servos, motors, or LEDs
- 12-Bit Resolution – Precise control with 4096 steps
- Direct Servo Connection – 3-pin headers for standard servos
- Free-Running Output – Set once, runs continuously
- External Power Option – DC barrel jack for high-power applications
- Adjustable Frequency – 24Hz to 1526Hz range
Ideal For
- Robotics projects with multiple servos
- DC motor speed control
- LED dimming and light shows
- Pan/tilt camera mounts
- Animatronics
Specifications
- PWM Channels: 16
- Resolution: 12-bit (4.9μs at 50Hz)
- Frequency Range: 24Hz – 1526Hz
- Power: 5V from Dock, or external via DC barrel jack
Compatibility
- Onion Omega2 / Omega2+
- Requires a Dock with Expansion Header (Expansion Dock, Power Dock, or Arduino Dock R2)
Package Contents
- 1× Servo Expansion for Onion Omega2
Note: For more than 2 servos or high-power applications, use the DC barrel jack with an external power supply. The Omega's 5V line is isolated from the barrel jack for protection.
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- 12-bit resolution
- 12-bit resolution means a value is represented with 12 binary digits, giving 4096 possible levels. For a sensor, analogue-to-digital converter or similar device, higher resolution divides the measured range into finer steps so smaller changes can be distinguished, provided the device's range and noise allow it.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- DC barrel jack
- A round power connector commonly used for low-voltage DC power supplies, often described by its outer and inner diameters such as 5.5 x 2.1 mm. Matching the barrel size and polarity is important so the plug physically fits and powers the device correctly.
- Headers
- Rows of connector contacts on a fixed pitch (commonly 2.54 mm) used to link a board to a breadboard, jumper wires, or another board. They come as male pin headers and female socket headers; when a module ships with pre-soldered headers it can be used straight away, whereas bare pads require soldering the pins yourself.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- PWM
- Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
- servo
- A servo is a motor with built-in position control, usually told to move to a specific angle by a control signal. It matters when you need repeatable movement, such as steering, arms, flaps, or linkages, rather than continuous spinning.
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