This Feedback Servo adds position sensing to a standard hobby servo by exposing the potentiometer output, making it ideal for robotics, motion recording, and projects that need real-time feedback on servo position.
It looks like a servo; it acts like a servo, but it's more than just a servo! We got a factory to custom-make these classic 'standard' sized hobby servos with a twist - the feedback (potentiometer wiper) line is brought out to a fourth white wire. You can read this wire with an analogue input such as those on an Arduino, to get the servo's position. That information can be used in robotics to improve stability or even allow 'recording' of servo motion.
Please note that the default servo pulse widths (usually 1ms to 2ms) may not give you a full 180 degrees of motion. In that case, check if you can set your servo controller to custom pulse lengths and try 0.75ms to 2.25ms. You can try shorter/longer pulses, but be aware that if you go too far you could break your servo!
Check out our example Arduino sketch, which demonstrates how to record motion data to the EEPROM and then play it back when a button is pressed. It comes with a range of horns.
Features
Standard sized hobby servo with position feedback
Fourth white wire outputs potentiometer feedback for analogue position reading
Compatible with Arduino and other microcontrollers with analogue inputs
Enables servo position monitoring for robotics applications
Supports motion recording and playback functionality
Customisable pulse widths (0.75ms to 2.25ms recommended for full 180° range)
Includes example Arduino sketch for EEPROM recording
Supplied with multiple servo horns
Improves system stability through position feedback
Specifications
High Strength nylon fibre shell
High Strength nylon gear
Integrated digital control circuit
Dual-ball bearing
Dimensions: 39.3mm x 19.4mm x 38.7mm
Weight: 48.8g
Parameters
4.8V-3.8kg/cm - 0.22sec/60degree
6V-5.0kg/cm - 0.18sec/60degree
Revision History
As of January 29, 2024 - The servo is now a 'digital servo': the internal control circuitry is digital not analogue. The feedback signal is still an analogue voltage, and works the same as the previous version.
