This module uses an ultrasonic sensor to trigger certain notes to be played through the pi. An object is held in front of the sensor and moved either closer or further away to make music. This is ...

[Thomasz] took a look at the Raspberry Pi 4 and realized the new USB 3.0 chip is attached to the ... Throw that in an ultrasonic cleaner, and you have a blank canvas to work PCI magic.

[Andy Grove] built an eight-sensor HC-SR04 breakout board, because the ultrasonic distance ... that’s a Raspberry Pi, so he needed the usual 5 V to 3.3 V level shifting in between.

To build your very own IoT rain checking system, you will need a Raspberry Pi 3 Model B, a DHT11 Temperature & Humidity Sensor (4 pins), and ... sensor will typically connect to the GPIO pin ...