SparkFun Servo Trigger

The SparkFun Servo Trigger is an innovative robotics board that streamlines the operation of hobby RC servo motors. It offers a fuss-free way to control servo motors, without the need for any programming. When an external switch or logic signal changes state, the Servo Trigger instructs the attached servo motor to transition from position A to position B. The Servo Trigger comes with on-board potentiometers to adjust the start/stop positions and the transition time. All you need to do is connect a hobby servo and a switch.

The Servo Trigger is powered by an Atmel ATTiny84 microcontroller, which runs a small program to control the servo. The board features three potentiometers - 'A' for setting the position the servo holds when the switch is open, 'B' for determining the position the servo moves to when the switch is closed, and 'T' for setting the transition time between positions A and B. The Servo Trigger board is also energy-efficient, drawing just about 5 mA at 5V. However, be aware that the maximum supply voltage should not exceed 5.5 VDC. The design of the SparkFun Servo Trigger allows for easy daisy chaining of boards by simply connecting the VCC and GND pads on adjacent boards.

For more advanced usage tips, configurations, and modes, refer to the Hookup Guide in the Documents section. This product was originally inspired by our friend in the Oakland area, CTP. Do give him a high-five if you see him!

Key features of the SparkFun Servo Trigger include:

• Recommended Voltage: 5VDC
• Maximum Voltage: 5.5VDC
• Current Draw: 5 mA
• Three Control Settings: A for the open switch position, B for the closed switch position, and C for the transition time
• Easy Control with Potentiometers
• Configurable Input Polarity
• Configurable Response Mode
• Compatible with Analog Servos
• ISP Header pins Available for Reprogramming

Relevant documents:

• Schematic
• Eagle Files
• Hookup Guide
• Datasheet (ATtiny84)
• GitHub