1. Introduction
This manual provides essential information for the safe and effective use of EGBO Active Buzzers. These magnetic piezo buzzers are designed to produce a continuous beep tone when power is applied, making them suitable for various alarm and indication applications in electronics projects, including those based on Arduino platforms. Please read this manual thoroughly before installation and operation.
2. Specifications
The EGBO Active Buzzers are available in various voltage ratings. Below are the detailed specifications for common models:
| Parameter | TMB-12A01 (1.5V) | TMB-12A03 (3V) | TMB-12A05 (5V) | TMB-12A12 (12V) |
|---|---|---|---|---|
| Rated Voltage | 1.5V | 3V | 5V | 12V |
| Operation Voltage | 1.2V ~ 2.5V | 2.5V ~ 4V | 4V ~ 7V | 8V ~ 15V |
| Rated Current | ≤20mA | ≤35mA | ≤30mA | ≤20mA |
| Sound Output (at 10cm) | ≥80dB | ≥82dB | ≥85dB | ≥85dB |
| Resonant Frequency | 2300 ± 500 Hz | |||
| Operating Temperature | -20°C ~ +60°C | -20°C ~ +85°C | ||
| Storage Temperature | -20°C ~ +70°C | -30°C ~ +85°C | ||
| Weight | Approximately 2g (per unit) | |||
Physical Dimensions:
- Diameter: Approximately 12mm
- Height: Approximately 9.5mm
- Foot Spacing: Approximately 7.6mm
Performance Graphs:
These graphs illustrate the sound output in decibels (dB) and current consumption in milliamperes (mA) across their respective operating voltage ranges at 25°C for different buzzer types.
3. Product Features
- Active Buzzer: Produces a continuous tone when power is applied, simplifying control compared to passive buzzers.
- Wide Voltage Range: Available in 3V, 5V, 12V, and 24V versions to suit various power supplies.
- Compact Size: Miniaturized design (approx. 12mm diameter) for space-constrained applications.
- Magnetic Piezo Technology: Reliable and efficient sound generation.
- Clear Polarity Marking: Buzzers are marked with a '+' symbol for the positive terminal.
4. Setup and Installation
4.1 Polarity
The buzzer has two pins. The longer pin is the positive (+) terminal, and the shorter pin is the negative (-) terminal. Ensure correct polarity when connecting to a power source to prevent damage.
4.2 Connection
Connect the positive (+) terminal of the buzzer to the positive voltage supply and the negative (-) terminal to the ground or control pin of your circuit (e.g., a microcontroller pin). A current-limiting resistor may be required depending on your circuit design and the buzzer's rated current.
4.3 Soldering Guidelines
These buzzers are suitable for wave soldering. Please adhere to the following temperature and time limits:
- Environmental Protection Soldering: Maximum welding temperature 230°C.
- Non-Environmental Protection Soldering: Maximum welding temperature ≤210°C.
- Welding Time: Parameters above 2 seconds are for reference only. Aim for quick soldering to avoid overheating.
Important Note: Some buzzer bodies may have a 'split body' design with a gap in the middle, which is not heat resistant. Other 'one body' designs without a gap offer higher temperature resistance. Exercise caution during soldering based on the specific buzzer construction.
The sticker 'REMOVE SEAL AFTER WASHING' indicates a protective seal that should be removed after any cleaning processes involving liquids, such as flux residue removal, to ensure proper operation and prevent moisture trapping.
5. Operation
EGBO Active Buzzers are designed for straightforward operation:
- When the correct rated voltage is applied across the positive and negative terminals, the buzzer will produce a continuous beep tone.
- The sound output level and current consumption will vary with the applied voltage within the operational range, as detailed in the specifications table and performance graphs.
- These are active buzzers, meaning they contain an internal oscillator and will produce a tone directly when powered, without requiring an external oscillating signal.
6. Maintenance
These buzzers are generally maintenance-free. However, consider the following:
- Cleaning: If cleaning is necessary (e.g., after soldering), use appropriate electronic cleaning solutions. Ensure the 'REMOVE SEAL AFTER WASHING' sticker is removed after cleaning to allow any trapped moisture to escape and prevent corrosion.
- Storage: Store buzzers in a dry, cool environment within the specified storage temperature range (-20°C to +70°C or -30°C to +85°C depending on model) to prolong their lifespan.
- Environmental Conditions: Avoid exposing the buzzers to excessive moisture, dust, or extreme temperatures outside their operating range.
7. Troubleshooting
If your buzzer is not functioning as expected, consider these common issues:
- No Sound:
- Check power supply: Ensure the correct voltage (within the operational range) is applied.
- Check polarity: Verify that the positive (+) and negative (-) terminals are connected correctly.
- Check connections: Inspect for loose wires, cold solder joints, or short circuits.
- Buzzer type: Confirm it is an active buzzer; passive buzzers require an oscillating signal.
- Weak or Distorted Sound:
- Insufficient voltage: Ensure the applied voltage is within the optimal operating range.
- Damaged unit: The buzzer may have been damaged during soldering (overheating) or handling.
- Continuous Sound (when not desired):
- Check control circuit: Ensure the control signal is correctly switching the power to the buzzer. Active buzzers will sound as long as power is supplied.
8. Warranty and Support
For warranty information, returns, or technical support, please refer to the seller's policy on the platform where the product was purchased. Keep your purchase receipt or order details handy when contacting support.
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