9mm Electromagnetic Buzzer: 40Ω, 4-6V, Top Opening

The 9mm Electromagnetic Buzzer: 40Ω, 4-6V, Top Opening from Pololu is a compact and efficient sound solution for embedded projects. This small yet powerful device can be controlled by a PWM signal ranging from 4V to 6V, and it emits sound at the frequency of the supplied signal through an opening at the top. It's important to note that the maximum current draw is 60mA, which is more than what a typical microcontroller I/O pin can supply, so it's advisable to use a suitable driver like a small MOSFET.

The Pololu 9mm electromagnetic buzzer is a versatile tool that can be used in a variety of applications. For instance, it can be used in alarm systems, timers or even as a feedback mechanism in user interfaces. It's compact size of just 9mm makes it an ideal choice for projects where space is a constraint.

One of the unique properties of this buzzer is its ability to produce sound at the frequency of the supplied PWM signal. This means that you can control the sound it produces, making it a flexible solution for a variety of applications. Additionally, the top opening design allows for a clear and unobstructed sound output.

Pololu's 9mm electromagnetic buzzer is not just compact and versatile, but also incredibly efficient. With a maximum current draw of 60mA, it provides a powerful performance without draining too much power. This makes it a cost-effective and energy-efficient solution for adding sound to your projects.