Buzzers are common audio signalling devices which utilize 2 mainstream technologies - Piezo Buzzers and Magnetic Buzzers. Each have specified advantages and tradeoffs when considering their use, depending on the requirements of your project
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| Piezo Buzzer | Magnetic Buzzer | |
|---|---|---|
| Operating voltage | Wide | Narrow |
| Current consumption | Lower | Higher |
| Rated frequency | Higher | Lower |
| Footprint | Larger | Smaller |
| Sound pressure level | Higher | Lower |
At the same time, you can classify both piezo buzzers and magnetic buzzers by their driver circuitry - Indicators and Transducer.
Piezo and magnetic indicators come with internal driving circuitry, creating a “plug and play” solution to drive the buzzers. Transducers require you to build external driving circuitry, so it offers the flexibility to customize your circuit.
| Indicator | Transducer | |
|---|---|---|
| Built in driving circuit | Yes | No, external driving circuit required |
| Design | Simple | Complex |
| Frequency Range | Fixed | User-selected or multiple |
For more technical information on buzzers, please check out more TechForum threads here: