Before we get started it is important to understand that there two types of nRF24L01 modules available in the market one is called just nRF24L01 and the other is called nRF24L01+ PA+LN. While both the ...

Arduino library for the HLK LD2420 radar sensor that makes interaction easy and intuitive. The HLK-LD2420 is a high-performance 24GHz human presence and motion radar sensor module. It is designed for ...

Let me introduce another simple microcontroller-based do-it-yourself circuit that detects motion and excites a light source in a flash. The “snooper” here is an ordinary passive infrared (PIR) motion ...