SparkFun Servo Trigger - Continuous Rotation
149 units available with a short lead time.
The SparkFun Continuous Rotation (CR) Servo Trigger lets you control a hobby CR servo motor without any programming. Simply connect a servo and a switch, adjust the three onboard potentiometers, and the board handles everything — when the switch changes state, the servo transitions between two speeds/directions over a configurable time period.
Built around an ATtiny84 microcontroller with pre-loaded CR servo firmware, the board draws just 5 mA at 5 V and supports daisy-chaining multiple boards by connecting VCC and GND pads together.
Key Features
- No Programming Required – Control CR servos with just a switch and three pots
- Three Potentiometers – A (switch-open speed), B (switch-closed speed), T (transition time)
- Configurable Input Polarity – Works with switches or logic signals
- Configurable Response Mode – Choose how the servo responds to input changes
- Daisy-Chainable – Connect multiple boards via VCC/GND pads
- ISP Header – Reprogram the ATtiny84 for custom firmware
- Low Power – ~5 mA draw at 5 V (servo current additional)
Specifications
- Recommended Voltage: 5 V DC
- Maximum Voltage: 5.5 V DC
- Current Draw: ~5 mA (board only)
- Servo Compatibility: Analogue continuous rotation servos
Ideal For
- Robotics projects without a microcontroller
- Automated displays and animatronics
- Kinetic art and interactive installations
Resources
The SparkFun Servo Trigger - Continuous Rotation appears in the following collections:
