What You’ll Build By the end of this guide you’ll have a live web dashboard that displays a temperature history graph for each sensor you connect to your Raspberry Pi. The interface is clean, responsive, and can be accessed from any device on your network. Hardware Requirements Raspberry Pi Model A

Internet of Things (IoT) is reshaping how we interact with everyday devices. With sensors that stream data to the cloud, you can monitor and manage environments from anywhere. If youre new to IoT, a simple temperature, humidity, and light monitor is an excellent starting point. In the humid Northeas

In earlier projects we covered temperature sensors, PIR motion modules, and basic GPIO interfacing. The HC‑SR04 ultrasonic range finder is a popular choice for distance measurement, but its 5 V output must be reduced to 3.3 V to protect the Raspberry Pi’s GPIO pins. This tutorial walks you through t

Abstract Connect a Lego Mindstorms NXT Ultrasonic Sensor directly to a Raspberry Pi. The solution uses a TCA9517 I²C buffer and an extra GPIO for SCL, plus a concise C++ snippet to read distance. Introduction While the Raspberry Pi is celebrated for its extensive community and documentation, the Leg

While most developers work with static files or simple graphics, physical computing opens the door to real‑world interaction. By reading data from sensors and driving actuators, you can create systems that sense, decide, and act in the physical world. Goal Use a Raspberry Pi to read accelerometer va

Overview During our time at the Hacker School, we observed that the facility’s two restrooms—one adjacent to the main workspace and another on the lower level—could benefit from a real‑time occupancy status indicator. By knowing whether a bathroom is occupied before heading downstairs, we could redu

By Rushi Gajjar, author of Raspberry Pi Sensors, this guide distills the core electronics knowledge you need to build reliable Raspberry Pi projects. In today’s world, electronics underpin everything from toothbrushes to aircraft, and a solid grasp of the fundamentals will save you time and frustrat

While the LEGO Mindstorms EV3 kit ships with an impressive array of sensors, you can take your robot’s perception to the next level by building a custom object sensor. This guide walks you through creating a lightweight, light‑based detector that mimics a touch sensor, yet uses illumination and shad

Detecting volatile sulfur compounds—the primary cause of foul odors—requires a sensor that can sense low‑level concentrations. The Figaro TGS2600 is designed for this purpose. It uses a heated sensing element that changes its electrical resistance when exposed to gases such as hydrogen sulfide or me

With a standard USB camera you can build a reliable motion‑sensing alarm that runs on any Java SE‑enabled machine, including the Raspberry Pi. Using Reactive Blocks, a visual Java programming tool, you can assemble a fully‑functional application that captures images, detects motion, and sends an SMS

Contents Manifesto The Board The Geiger Tube Types of radiation Supported Geiger Tubes Testing Sources Actuators From CPM to Sieverts Source Code Schematic Participate Buy Links and Documentation NOTE: All code examples in this tutorial use the arduPi library. You can view the documen

Raspberry Pi boards run on the Broadcom BCM2835 processor, which offers 26 general‑purpose input/output (GPIO) pins. While Python libraries such as RPi.GPIO make controlling these pins straightforward, a notable limitation compared to Arduino is the absence of true analog inputs. GPIO pins are stric

The goal of this project is to repurpose a low‑cost solar driveway light (available for $3–$4 at hardware stores like Lowe’s and Home Depot) into a wireless remote sensor node. The node uses an MSP430G2553 microcontroller and an nRF24L01+ transceiver (with the spirilis library) to transmit light int

This guide extends two foundational projects – the Raspberry Pi Garage Door Opener and the PiMyLifeUp Raspberry Pi Webcam Server. It adds a magnetic door‑status sensor and displays the live video feed directly on the control page. Step 1: Complete the Prerequisite Instructables Before proceeding, f

Testing the DS18B20 Temperature Sensor on Raspberry Pi sudo modprobe w1-gpio sudo modprobe w1-therm cd /sys/bus/w1/devices ls cd 28-xxxx (replace with the serial number that appears) cat w1_slave The 1‑Wire interface can be a bit flaky, but it reliably reports whether a temperature value is availa

Build a Raspberry Pi‑Based Thief Detector – Step‑by‑Step Guide Discover how to turn a low‑cost, credit‑card‑sized computer into a practical home security tool. With just a few components, you’ll learn about GPIO pins, simple circuitry, and Python scripting while creating a device that alerts you whe

In the latest iteration of my piHouse home‑automation project, I installed two additional DS18B20 temperature sensors: an outdoor unit that I had previously programmed but never deployed, and a new sensor in the bedroom. The upgrade required careful hardware planning, a new cable run through the hou

Reading Analog Sensors with Raspberry Pi and Zabbix Although the Raspberry Pi lacks native analog inputs, the MCP3008 10‑bit, 8‑channel ADC makes it trivial to add analog capabilities. It plugs directly into the Pi’s GPIO header via the SPI bus and requires no extra components. This tutorial walks y

If you want to build electronic devices, at some point you’re going to need to read data through GPIO. In this exercise, we’re going to read the value of a push button on a breadboard. Set up the circuit as shown in the pictures on the right. Note that one end of the 4.7kOhm resistor connected to p

Build a Multi‑Sensor Temperature & Light Monitoring System with Raspberry Pi & DS18B20 What You’ll Need 2 × DS18B20 digital temperature sensors 2 × 4.7 kΩ pull‑up resistors Standard breadboard, jumper wires, and a 3.3 V power source from the Pi Optional: 47 Ω resistor, 1 × LED, female‑to‑male jumpe