38 hands-on sensor catalog (vol iii) projects — every one with a wiring diagram, working code, troubleshooting flow and a quiz.
Build a digital weather station that tracks heat and moisture using a single-wire interface.
Master the world of echolocation by building a digital ruler that sees with sound!
Build a smart proximity detector that 'sees' objects using invisible infrared light.
Turn your Arduino into a precision thermometer using the highly accurate LM35 linear sensor.
Build a smart monitoring system that tells you exactly when your plants need water.
Build a smart weather station component that detects raindrops and measures rain intensity!
Build an electronic 'ear' that can measure volume levels and detect sudden noises.
Listen to the world by converting sound waves into visual data on your screen.
Build a fire-detection circuit that "sees" heat using infrared light.
Build a solid-state magnetic switch that detects hidden magnetic fields using the power of the Hall Effect.
Build a liquid depth monitor that uses the conductivity of water to measure fill levels in real-time.
Detect liquid levels through solid containers without ever getting the sensor wet!
Build an air quality monitor that detects microscopic smoke and dust particles using infrared light.
Build a smart safety sniffer that detects smoke, LPG, and combustible gases in real-time.
Build a sensitive breathalyzer-style circuit to detect and measure alcohol vapor concentrations.
Build a smart gas leak detector to spot LPG and Natural Gas leaks before they become dangerous.
Master the mechanics of gaming controllers by building your own 2-axis input system.
Discover the battle between magnetism and light by comparing two of the most popular 'non-contact' digital sensors.
Master the 1-Wire protocol to read precise temperatures from submerged liquids using a single digital pin.
Turn heat into data by building a custom digital thermometer using an NTC thermistor and a voltage divider circuit.
Turn your Arduino into a precision altimeter and weather station using high-accuracy barometric sensing.
Give your Arduino a permanent memory of time and date, even when unplugged!
Build a high-precision digital clock that keeps perfect time even when the power goes out.
Detect motion through walls and obstacles using the power of Doppler Effect radio waves!
Unlock the world of wireless identification by building your own RFID-based security scanner.
Master the building block of digital clocks by controlling an 8-LED matrix arranged in a 'figure 8' pattern.
Master parallel communication by building a high-contrast 16-character digital dashboard.
Bring your projects to life with a crisp, high-contrast digital display using only two data wires.
Master the art of 'NeoPixels' to control hundreds of colorful LEDs using just a single microcontroller pin!
Measure light with human-eye precision using the high-dynamic-range TSL25911 sensor.
Give your Arduino 'vision' by detecting and distinguishing between millions of different colors.
Unlock 3D motion tracking by measuring acceleration and rotation with high precision.
Build a high-tech medical monitor to visualize your heartbeat and oxygen levels in real-time.
Visualize your own heartbeat in real-time by measuring light reflection through your skin!
Turn your Arduino into a professional data logger by saving real-time information to a MicroSD card.
Build a rugged, industrial-grade distance meter that can survive rain, splashes, and outdoor environments.
Build a long-range wireless weather station capable of transmitting data over kilometers using LoRa technology.
Build a smart irrigation system that monitors soil moisture and lets you water your plants from any smartphone on your Wi-Fi network.
