EC11 Rotary Encoder

EC11 Rotary Encoder With Button 20 Steps

Pwm 360 Degree Rotary Encoder With Button Digital Potentiometer Menu Motor Speed Adjustment Control Power Supply Electronic Circuit Automation Medical

     The EC11 Encoder is a 20 step mechanical rotary encoder with a push button. The shaft rotates endlessly (360 degrees, no end stop) and produces 20 pulses in 1 full turn; each step has a noticeable click, and one step is 18 degrees. The rotation angle and amount of rotation are calculated by counting the pulses. The A and B outputs give signals with a phase difference to each other; since the order of the signals changes between clockwise and counterclockwise rotation, the direction of rotation is also detected.

     It has a button function: when the shaft is pressed, the internal button closes; so the same knob is used both to change a value and to make a selection. The encoder has 3 pins on one side (A, C common, B), 2 button pins on the other side and 2 mounting legs on the sides that fix the body to the board. Thanks to the 6mm diameter, 20mm long shaft and the threaded bushing, the encoder is fixed to a front panel with a nut; a knob is fitted on the shaft.

     Unlike a potentiometer, it does not give an absolute position; it reports rotation step by step. Therefore it is used in endlessly rotating adjustment knobs such as menu navigation, volume, temperature, speed and time setting. Its rating is 5V DC, 10mA; it is read directly by the digital inputs of a microcontroller.

Key features:

     20 steps, click feel: There are 20 pulses and 20 clicks in 1 turn; each click is 18 degrees. The user feels how many steps were turned.

     Direction detection: The order of the A and B outputs differs clockwise and counterclockwise; the software reads both the amount and the direction of rotation.

     Push on shaft button: The button that closes when the shaft is pressed is used for selection and confirmation; no separate button is needed.

     Panel mounting: The threaded bushing passes through a 7mm panel hole and is fixed at the front with the nut and washer in the package.

     Long life: Rotation life is 30000 cycles, button life is 20000 presses.

Features:

• Product type: Mechanical rotary encoder with push button (incremental)
• Model: EC11 Encoder
• Number of steps: 20 steps (clicks), 20 pulses in 1 turn
• Step angle: 18 degrees
• Rotation angle: 360 degrees, endless rotation (no end stop)
• Output: A and B, two channel phase shifted signal (2 bit gray code)
• Direction: Different output for clockwise and counterclockwise rotation
• Button: Button that closes when the shaft is pressed (normally open)
• Number of pins: 7 (A, C, B + 2 button pins + 2 mounting legs)
• Rating: 5V DC, 10mA
• Compatible boards: Arduino, ESP32, STM32 and microcontrollers with digital inputs
• Mounting: Panel mounting, 7mm hole, with nut and washer
• Rotation life: 30000 cycles
• Button life: 20000 presses
• Operating temperature: -20°C to +70°C
• Shaft: 6mm diameter, 20mm length
• Threaded bushing diameter: about 6.8mm
• Color: Silver metal body and shaft
• Dimensions: 12mm x 12.5mm body, total height with pins 30mm
• Weight: about 4gr

Usage information:

• The middle pin (C) on the 3 pin side is connected to GND, the A and B pins to two digital inputs of the microcontroller; pull-up resistors (internal or external 10k) are used on the inputs. One of the button pins is connected to GND and the other to an input with pull-up.
• The mechanical contacts bounce briefly at each step; the reading is filtered in software or small capacitors are placed on the A and B inputs. The direction of rotation is found by checking which of A and B changes first.
• For panel mounting a 7mm hole is drilled, the encoder is inserted from the back and tightened from the front with the washer and nut in the package; a knob with a 6mm hole is fitted on the shaft.

Areas of use:

•  Menu adjustment knob (devices with display)
•  Amplifier volume level adjustment
•  Motor speed adjustment
•  3D printer display control knob
•  Soldering station temperature adjustment
•  Laboratory power supply voltage and current adjustment
•  Thermostat temperature adjustment knob
•  Timer duration adjustment
•  Radio frequency tuning
   

Precautions:

•  Unlike a potentiometer, the encoder gives no resistance value or absolute position; if the position is not saved in software, it is lost when power is cut.
•  Pass at most 10mA through the pins; the encoder is only a signal input and does not drive loads such as LEDs, relays or motors directly.
•  Do not heat the pins for a long time when soldering; the plastic base can soften and the contacts can be damaged.
•  Do not overtighten the nut; the threaded bushing and body can be damaged.

Package contents:

•  1 Piece EC11 Rotary Encoder
•  1 Piece Nut and washer
•  Note: The knob is not included in the package.