The **18VP-261S-R** is a specific part number primarily associated with **DC coreless vibration motors** (commonly referred to as eccentric rotating mass or ERM motors). These components are widely used in handheld devices to provide haptic feedback. --- ### 1. Technical Specifications While exact data can vary slightly by manufacturer (often branded under Jinlong or similar micro-motor specialists), the standard specifications for this series are as follows: | Parameter | Specification (Typical) | | :--- | :--- | | **Type** | Cylindrical Coreless Vibration Motor | | **Rated Voltage** | 3.0V DC | | **Operating Voltage** | 2.2V - 3.6V DC | | **Rated Current** | 80mA - 100mA (Max) | | **Rated Speed** | 10,000 ~ 14,000 RPM | | **Rotation** | Clockwise (CW) / Counter-Clockwise (CCW) | | **Weight Attachment** | Eccentric Weight (Pendulum) | --- ### 2. Key Components & Construction The "18VP" designation refers to the motor's architecture. Here is a breakdown of its physical build: * **Permanent Magnet:** Uses a high-strength neodymium magnet to create a static magnetic field. * **Coreless Coil:** Unlike standard motors, the rotor consists of a copper coil bonded together without an iron core. This reduces weight and allows for faster acceleration/deceleration. * **Eccentric Mass:** A semi-circular metal weight (usually tungsten or brass) is attached to the shaft. As it spins, the unbalanced mass creates a centrifugal force, resulting in vibration. * **Commutator/Brushes:** Internal metal brushes transfer current to the rotating coil. --- ### 3. Common Applications Due to its small form factor and low power consumption, the 18VP-261S-R is found in: * **Mobile Phones:** For silent alerts and ringtone vibration. * **Wearables:** Smartwatches and fitness trackers. * **Medical Devices:** Small handheld alerts for glucose monitors or pagers. * **Toys:** Simple vibrating mechanisms. --- ### 4. Implementation Circuit To control this motor using a microcontroller (like an Arduino or ESP32), a simple transistor driver circuit is required because the motor draws more current than a GPIO pin can provide. ```cpp // Basic Arduino Control Logic int motorPin = 9; // PWM pin void setup() { pinMode(motorPin, OUTPUT); } void loop() { analogWrite(motorPin, 150); // Moderate vibration delay(500); analogWrite(motorPin, 0); // Stop delay(1000); } ``` ---