SparkFun
SparkFun Servo Trigger
The SparkFun Servo Trigger is a compact robotics board that simplifies control of hobby RC servo motors — no programming required. When an external switch or...
The SparkFun Servo Trigger is a compact robotics board that simplifies control of hobby RC servo motors — no programming required. When an external switch or logic signal changes state, the board tells an attached servo to move from position A to position B.
Simply connect a hobby servo and a switch, then adjust the three on-board potentiometers to set the start position, end position, and transition time. The board is designed for easy daisy chaining — connect the VCC and GND pads on adjacent boards to run multiple servos from a single power source.
Key Features
- No Programming Required – Configure everything with three potentiometers
- Three Control Potentiometers – A (start position), B (end position), T (transition time)
- ATtiny84 Microcontroller – Handles all servo control logic on-board
- Configurable Input Polarity – Works with normally-open or normally-closed switches
- Configurable Response Mode – Multiple operating modes available via the hookup guide
- Daisy Chainable – Connect multiple boards via shared VCC and GND pads
- ISP Header – Reprogrammable via standard ISP programming pins
- Low Current Draw – Approximately 5 mA at 5 V (excluding servo)
Specifications
- Recommended Voltage: 5 V DC
- Maximum Voltage: 5.5 V DC
- Current Draw: ~5 mA (board only)
- Servo Compatibility: Analog hobby servos
Ideal For
- Animatronics and props
- Automated doors, gates, and latches
- Robotics projects without a microcontroller
- Interactive displays and exhibits
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- ISP
- An image signal processor is hardware that helps process raw camera data into usable images or video. It matters for vision projects because it can improve camera handling and reduce the processing load on the main CPU.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- 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.
Find this product in
Brands
Robotics & Motion
SparkFun Servo Trigger Schematic
Schematic · 116.0 KB · Click any page to view full size
Servo Trigger IC Datasheet
Datasheet · 4.4 MB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 646.1 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
