With a standard old HC-SR04 ultrasonic sensor, an audio module and a servo to drive a custom gauge needle he’s made a device which can warn people around you if they’re too close for comfort.

The SRF01 is a popular ultrasonic sensor used primarily for range finding applications. [Jaanus] discovered that they had a few flaws, including not working after being dropped. The faulty ones beg… ...

The sensor also can be used in applications that require level sensing, such as in a liquid dispenser or coffee machine. The SmartSonic family of ToF sensors integrate a MEMS piezoelectric ...

In addition, sensors can be spaced closer together for more-reliable scanning of the application’s objects. For a detection range of up to 6,000 mm, synchronized operation can have ultrasonic ...

The latter application pushed Tesla to develop new sensors, or new ways to hide the sensors, because CEO Elon Musk didn’t like the idea of a visible sensor in the middle of a door.

As the latest batch of Android smartphones, the devices that will launch globally in 2025, start to launch in China, we’re seeing ultrasonic fingerprint sensors more broadly used.

On October 4th, Tesla announced that it plans to phase out ultrasonic sensors (USS) in favour of a camera-only ‘Tesla Vision’ driver assist system (via Electrek). This comes roughly a year and a half ...