SparkFun Servo Trigger - Continuous Rotation

The SparkFun Continuous Rotation (CR) Servo Trigger is a compact, highly efficient robotics board designed to simplify the control of hobby RC servo motors. This innovative product can instruct an attached servo motor to move from one position to another when an external switch or logic signal changes state. The CR Servo Trigger eliminates the need for programming, allowing you to easily incorporate a hobby servo into your projects.

SparkFun has listened to user feedback and has preprogrammed the CR Servo Trigger with continuous rotation logic, making it even more versatile and user-friendly. This means you can easily deploy continuous rotation servos into your projects without the need for tedious firmware reprogramming.

The CR Servo Trigger is powered by an Atmel ATtiny84 microcontroller, which runs a small program to implement the servo control features. The board includes three potentiometers, labelled "A", "B", and "T". "A" sets the servo's position when the switch is open, "B" sets the position when the switch is closed, and "T" determines the time it takes to transition between A and B.

This board is extremely energy-efficient, drawing only about 5mA at 5V. It's important to note that the maximum supply voltage should not exceed 5.5 VDC. The SparkFun CR Servo Trigger also comes with a daisy chain feature, allowing for easy connection of VCC and GND pads on adjacent boards.

The CR Servo Trigger was inspired by CTP, a friend of SparkFun from the Oakland area. If you ever meet him, be sure to give him a high-five on behalf of SparkFun!

The CR Servo Trigger boasts a range of impressive features, including a recommended voltage of 5VDC, a maximum voltage of 5.5VDC, and a current draw of 5mA. It's designed to control continuous rotation servos and offers three control settings, easy control with potentiometers, configurable input polarity, and response mode. It's compatible with analog servos and has ISP header pins available for reprogramming.

For more information, please refer to the schematic, Eagle Files, Hookup Guide, and the Datasheet for ATtiny84. You can also check out the GitHub page for the CR Servo Trigger.