Adafruit
Analog Feedback Standard-Size Servo
· MPN: ADA1404
This standard-size hobby servo adds a handy fourth white wire that brings out the internal potentiometer wiper. Connect it to an analogue input on a board su...
This standard-size hobby servo adds a handy fourth white wire that brings out the internal potentiometer wiper. Connect it to an analogue input on a board such as an Arduino to read the servo’s position as a voltage while still driving the servo as normal.
That feedback signal can be useful in robotics projects where you want better stability, position monitoring, or the ability to record and replay servo motion. The included example Arduino sketch demonstrates recording motion data to EEPROM and playing it back when a button is pressed.
Default servo pulse widths, usually 1ms to 2ms, may not provide the full 180 degrees of movement. If your servo controller supports custom pulse lengths, try 0.75ms to 2.25ms; going too far beyond the servo’s range could damage it.
As of January 29, 2024, this servo uses digital internal control circuitry. The feedback signal remains an analogue voltage and works the same as the previous version. It comes with a range of horns.
Specifications:
- Shell: High Strength nylon fiber shell
- Gear: High Strength nylon gear
- Control circuit: Integrated digital control circuit
- Bearing: Dual-ball bearing
- Dimensions: 39.3mm x 19.4mm x 38.7mm
- Weight: 48.8g
- Parameter: 4.8V-3.8kg/cm - 0.22sec/60degree
- Parameter: 6V-5.0kg/cm - 0.18sec/60degree
Jargon buster
Plain-language definitions for the technical terms used above.
- EEPROM
- A type of non-volatile memory that keeps stored data even when power is turned off. In a sensor module, it can be used to store settings or calibration data so they do not need to be re-entered every time.
- potentiometer
- A variable resistor usually turned with a knob or shaft to create an adjustable electrical signal. It is often used for inputs such as volume, brightness or position, so it helps beginners learn how a microcontroller reads changing values.
- servo
- A servo is a motor with built-in position control, usually told to move to a specific angle by a control signal. It matters when you need repeatable movement, such as steering, arms, flaps, or linkages, rather than continuous spinning.
Analog Feedback Servo Datasheet
Datasheet · 2.5 MB · Click any page to view full size
Supplier page — adafruit.com
Supplier Description · 1.1 MB · Click any page to view full size
Related Tutorials
Free guides on learn.littlebird.com.au
