The part number **11010-R** is most commonly associated with **Electromagnetic Buzzers** (specifically the **Sonalert / Mallory** style or compatible generic piezo indicators). These are widely used in industrial, automotive, and consumer electronics to provide audible alerts. --- ## 1. Technical Specifications Below is a summary of the typical technical parameters for an 11010-R series electronic buzzer: | Parameter | Typical Value / Range | | :--- | :--- | | **Type** | Magnetic / Piezo Indicator | | **Operating Voltage** | 3V - 15V DC (Nominal 12V) | | **Rated Current** | 10mA - 30mA | | **Sound Pressure Level (SPL)** | 85dB to 95dB at 10cm | | **Resonant Frequency** | 2300Hz ± 300Hz | | **Operating Temperature** | -20°C to +70°C | | **Mounting Type** | Through-hole (PCB) or Panel Mount | --- ## 2. Key Components & Construction The "R" in the part number often signifies **RoHS Compliance**, meaning the part is manufactured without hazardous materials like lead or mercury. The internal structure generally includes: 1. **Oscillator Circuit:** Most 11010-R models are "indicators," meaning they have a built-in drive circuit. You only need to apply a DC voltage to make them sound. 2. **Diaphragm:** A thin metal or ceramic plate that vibrates to create sound waves. 3. **Housing:** Usually made of PBT (Polybutylene Terephthalate) or ABS plastic, designed to resonance-amplify the sound. 4. **Terminals:** Two pins (Positive and Negative) for PCB soldering. --- ## 3. Applications These parts are found in various electronic systems due to their low power consumption and high reliability: * **Household Appliances:** Microwave timers, washing machine end-of-cycle signals. * **Security Systems:** Keypad feedback or alarm triggers. * **Medical Equipment:** Heart rate monitors or error indicators. * **Industrial Controls:** Panel alerts for machinery malfunctions. --- ## 4. Circuit Integration Since this is a DC-driven part, integration is straightforward. Below is a basic example of how to trigger a 11010-R using a microcontroller (like an Arduino) and a transistor: ```cpp // Basic code logic to trigger a 11010-R buzzer int buzzerPin = 9; void setup() { pinMode(buzzerPin, OUTPUT); } void loop() { digitalWrite(buzzerPin, HIGH); // Turn buzzer ON delay(1000); // Wait 1 second digitalWrite(buzzerPin, LOW); // Turn buzzer OFF delay(1000); // Wait 1 second } ``` > **Note:** Always verify the specific manufacturer's datasheet (e.g., TDK, Mallory, or DB Unlimited) as minor variations in voltage and frequency can exist between different brands using the same base part number.