Strictly speaking, a Theremin uses a pair of antennae that act as capacitors in a specific R/C circuit. Looking at ...

These days, most of us have a smartphone. They are so commonplace that we rarely stop to consider how amazing they truly are.

SparkFun Ultrasonic Distance Sensor - TCT40 Arduino Library for the SparkFun SparkFun Ultrasonic Distance Sensor The SparkFun Ultrasonic Distance Sensor - TCT40 (sen-24805) a user-friendly upgrade to ...

A simple library for HC-SR04 ultrasonic sensor. It uses STM32 HAL library. Copy the library header and source files to your project folder (Inc and Src folders).