Using a Doppler radar sensor with the Raspberry Pi

Using a Doppler radar sensor with the Raspberry Pi

There are many sensors on the market for the Raspberry Pi, Arduino and other single board computers/microcontrollers. But the RCWL-0516 is something new and exciting in that it offers the simplicity of a PIR sensor but with a greater range and ability to detect through objects, yet it still only retails for a few dollars from China.
Sending sensor data to Twitter using Node-RED

Sending sensor data to Twitter using Node-RED

In this tutorial, we shall use a cheap common sensor, the DS18B20 a waterproof and accurate sensor that can be bought for less than $5 online.
Build a wildlife camera using a Raspberry Pi and PiJuice

Build a wildlife camera using a Raspberry Pi and PiJuice

Build your own motion-sensing wildlife camera with a Raspberry Pi and PiJuice portable power