"I built each of these machines," the man said, noting, "if I bought them, they'd cost over a quarter-million to buy." ...

Abstract: This article presents an optical sensing technique for estimating water-fill levels and stratification states inside closed plastic pipelines using multiwavelength visible light. Four LEDs ...

This project utilizes an Arduino Uno CH340G development board paired with a DHT11 temperature and humidity sensor to create a compact yet capable environmental monitoring system. It measures ambient ...

Here we describe an electronic system that uses a dedicated water-level sensor to switch off the pump motor as soon as the ...