If you're working on projects that require a robust piezoelectric transducer for generating sound, the AT-42 series from PUI Audio is a solid choice. These transducers are particularly useful in applications where you need a reliable buzzer or speaker with good sound quality and durability. The AT-42 series includes models that cater to different voltage and frequency requirements, making them versatile for various projects.

For instance, the AT4230TFLW135R model is a flange-mount buzzer piezo designed for high-frequency applications, capable of producing a clear 3000 Hz tone at 96 dBA. This makes it perfect for alarm systems, signaling devices, or any application where a loud, clear beep is necessary. The 10V peak-to-peak output and 9mA current draw ensure that it can be easily driven by most microcontroller outputs without requiring additional amplification.

Another useful model is the AT4228TFLW145, which operates at 5V peak-to-peak and 2.8 kHz. This transducer is ideal for applications where you need a smaller form factor and lower power consumption, such as in portable devices or embedded systems. Its 3000 Hz output and 96 dBA sound pressure level make it suitable for alerting or indicating conditions in a quiet environment.

Engineers tend to reach for these piezos when they need a simple, reliable way to generate audible alerts or signals. They are known for their rugged construction and consistent performance, which is crucial in environments where reliability is key. Whether you're designing a security system, a medical device, or an industrial control panel, the AT-42 series offers a robust solution that can handle the demands of your project.