These are some great DIY projects that you can do for cheap.

Forewarned is forearmed.

This library is experimental and implements a minimal subset of the functionality of the sensor. The library includes reading the temperature and humidity register and the manufacturer-ID register.

The DHT11, 21, 22, 33 and 44 are relative inexpensive sensors for measuring temperature and humidity. This library can be used for reading both values from these DHT sensors. The DHT11 only returns ...

Abstract: This paper proposes an innovative Arduino-based Indirect Evaporating Cooling System (IFACS) for smart home applications in urban heat island environments, emphasizing energy efficiency and ...

Abstract: Ventilators are an absolute must in today's healthcare for patients in respiratory distress, especially those impacted by the COVID-19 epidemic. However, especially in environments with ...

To circumvent that issue, I decided this time to opt for a presence sensor. These use mmWave radar signals instead of ...

[Jean-Christophe Rona] found himself with some free time and decided to finish a project he started two years ago, reverse engineering cheap 433MHz home automation equipment. He hopes to control his ...

It’s hard to deny that label printers have become more accessible than ever, but an annoying aspect of many of these cheap units is that their only user interface is a proprietary smartphone app ...

The device, which pulls moisture from the atmosphere to form its electrolyte, could power wearable health monitors ...