That’s right, these parking sensors are powered by an Arduino board, and the only extra components that were used in the project are a HC SR04 ultrasonic sensor, an active buzzer, and jumper wires.

[Don] wanted to bring his alarm system into the ... the voltage to something the Arduino can handle. Once the Arduino detects a signal, it uses an ESP8266 WiFi module to send an email.

He wanted to build a wireless three-axis ... The base station consists of an Arduino and another nRF24L01 module plugged into a laptop. The telemetry system is based on COSMOS, an open-source ...