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Axiometa

LRA Motor (DA7820)

LRA Motor (DA7820)

AX22-0039

$2.49
$2.49
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This AX22-sized module integrates the LD0825BC linear resonant actuator (LRA) with a DA7820 haptic driver on a compact 22 × 22 mm PCB. The DA7820 is designed for LRAs and automatically handles resonance tracking at 240 Hz, ensuring strong and consistent tactile feedback with minimal code. It drives the motor with a 1.2 Vrms AC signal and up to 90 mA while protecting it with kick-start and braking control. A single GPIO trigger is all that’s needed - no external PWM or H-bridge. The module also includes Stemma QT connectors for quick I²C integration and chainable connections. Works with  Arduino IDE, MicroPython, or MicroBlocks.
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  • Technical Details

    - 22 mm × 22 mm square
    - 4× ⌀2.7 mm Mounting Holes
    - Rated Frequency: 240 Hz ±10 Hz
    - Vibration Acceleration: ≥ 0.70 Grms
    - 3.3 V, 5.0 V
    - Arduino IDE Compatible
    - MicroPython Compatible
    - MicroBlocks Compatible

    Material Datasheet 

  • Pinout

  • Interface

PCB Design

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Arduino Example Code

example.ino 
#include <Wire.h>
#include "Haptic_Driver.h"

Haptic_Driver hapDrive;

void setup() {
  Wire.begin(47, 48);
  hapDrive.begin();
  hapDrive.defaultMotor();
  hapDrive.enableFreqTrack(true);
  hapDrive.setOperationMode(DRO_MODE);
  hapDrive.clearIrq(hapDrive.getIrqEvent());
}

void loop() {
  hapDrive.setVibrate(127);
  delay(120);
  hapDrive.setVibrate(0);
  delay(50);

  delay(500);
}

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  • How Does an LDR work ?

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