SparkFun Servo Trigger
219 units available with a short lead time.
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
The SparkFun Servo Trigger appears in the following collections:
