With a modest investment of time and $25 in parts, you can turn a Raspberry Pi into a lightweight, real‑time pan/tilt webcam that follows faces. By combining OpenCV face detection, two hobby servos, and the servoblaster driver, the Pi can keep the camera centered on a subject at a frame rate faster

Discover how to create a reliable baby monitor that alerts you instantly when your little one cries. Using a Raspberry Pi, a USB webcam, and Philips Hue, this DIY solution offers real‑time notifications, secure live streaming, and even automated soothing music – all for a fraction of commercial moni

Reading a Linear Hall Sensor with Raspberry Pi This article consolidates two practical lessons on linear Hall sensors, covering both hardware and Java software. The first lesson uses a pure analog Hall sensor paired with the ADC0832 analog‑to‑digital converter. The second lesson builds on that by ad

Looking for a reliable, tech‑savvy way to secure your home office or private workshop? This guide walks you through creating a DIY smart lock that automatically detects your presence via Bluetooth and locks the door when you step away. The Concept Your smartphone constantly broadcasts a unique Bluet

This tutorial guides you through creating a compact IoT fire detection system that streams flame sensor readings to Samsung SAMIIO via WebSockets, using an Arduino UNO and Raspberry Pi. We’ll employ a simple, off‑the‑shelf IR flame sensor, upload a lightweight sketch to the Arduino, and run a Node.j

Curious about how much your hamster runs in a day? Our 9‑year‑old daughter sparked this project, and the results were both surprising and insightful. By combining a Raspberry Pi, a laser break‑beam sensor, and a simple script, you can effortlessly measure your pet’s distance traveled and speed. What

In the United States, agriculture consumes 80–90% of all freshwater. Installing a soil moisture sensor is one of the simplest ways to reduce irrigation demand and protect water resources. Below is a cost‑effective capacitive soil moisture sensor that uses a Raspberry Pi and a co‑planar capacitor sou

Prerequisites Raspberry Pi (any model with Wi‑Fi or Ethernet) BrickPi 2 (or BrickPi 3) expansion board 9 V battery or a regulated power supply to run the BrickPi and sensor Dexter Industries thermometer (or any compatible temperature sensor) Step 1: Sign Up for ThingSpeak Visit ThingSpeak.com and

This guide explains how to construct a network‑capable weather station that logs ambient air temperature, humidity, and barometric pressure in a laboratory setting. By integrating low‑cost, high‑accuracy sensors with a Raspberry Pi and Python scripts, researchers can obtain reliable environmental da

Bring your nighttime rides to life with the Cycle Chaser, a DIY system that projects dynamic animations onto the road behind you. Powered by a Raspberry Pi and a compact, battery‑operated pico projector, the animation’s speed syncs directly with your pedaling pace, creating a mesmerizing visual trai

Our first hands‑on project with the Raspberry Pi 2 was to create a headless water alarm. The goal was a compact, low‑power solution that could run unattended and alert us when water was detected. Below is a detailed walkthrough of the hardware, software, and troubleshooting steps we followed. Hardwa

Discover how to connect and control sensors on a Raspberry Pi using Java ME 8, unlocking powerful IoT capabilities. Published September 2014 The latest release of Java ME 8 introduces a robust Device I/O API that simplifies control of LEDs, relays, LCDs, sensors, motors, and switches. This article s

While searching for a simple way to measure temperature with a Raspberry Pi, I discovered the DS18B20 1‑wire digital temperature sensor. Its accuracy—±0.5 °C at 0 °C—and minimal wiring make it ideal for beginners and seasoned makers alike. The sensor is inexpensive, requires only a single 4.7 kΩ pul

Using a pressure sensor, LED, and speaker, a Raspberry Pi can quietly teach your dog to leave the couch. When the dog sits, the LED flashes and the speaker says “Get off the couch.” Once the dog gets up, it hears “Good dog.” This project was highlighted in the Bitreactive blog. Step 1: Install React

Software Topology and Theory of Operation OpenPnP serves as the high‑level control engine, orchestrating tasks such as picking and placing components. Its architecture integrates numerous libraries and subsystems, funneling data to motor controllers through dedicated modules. Created by Jason von Ni

Adding an Envelope Detector to Convert an RF Input to a DC Output I attached the ADC Pi module to the GPIO header and stacked the DDS module directly on top, using PCB support spacers to keep the two boards together and relieve strain on the GPIO pins. The next step was to turn the RF signal produce

This guide demonstrates how to use Raspberry Pi hardware to read a Passive Infrared (PIR) motion sensor and control an external LED. The example is built within Simulink®, enabling you to create and run models directly on the Pi. Introduction The Raspberry Pi target for Simulink® provides a library

This tutorial will teach you how to create a network of cost effective, wireless sensor modules.  Many of the ready-made wireless modules can be too expensive for use in multiple sensor units.  While Wi-Fi and Zigbee modules are popular and easy to use, their cost can make their use in an array of s

Why a Wireless Solution Makes Sense Monitoring a 300‑foot driveway can be challenging. Traditional IR beam‑break detectors are costly, generate false alarms, and are vulnerable to weather events—my own system failed after a lightning strike and required a long, weather‑rated cable. Choosing an Affor

This guide walks you through creating a reliable, feature‑rich universal remote using a Raspberry Pi and LIRC. It’s designed for hobbyists and professionals alike, emphasizing clear instructions, proper component selection, and a clean setup process. Step 1: Gather the Parts 1 x Raspberry Pi (https