Sensors & Microcontrollers
Learn. Build. Measure. Create.
Practical tutorials, wiring diagrams, tested code and troubleshooting guides for Arduino, ESP32 and electronic sensor projects.
Practical Sensor Guides That Actually Work
This growing electronics hub is built around real modules, real wiring and real testing. Each guide is designed to help beginners, students, makers and engineers get useful results without wrestling with vague datasheets or broken example code.
Clear Wiring
Simple connection tables and diagrams for Arduino, ESP32 and compatible development boards.
Tested Code
Complete sketches, library setup instructions and example Serial Monitor output.
Real Troubleshooting
Common faults, incorrect readings, compatibility issues and practical fixes explained plainly.
Learn Arduino UNO from zero
Start with breadboards, then build LEDs, tactile buttons, variables and a working button counter. Each lesson includes a YouTube demonstration slot, working code, experiments and a practical challenge.
Browse by Sensor Type
Choose a category to find sensor comparisons, setup guides, example projects and buying advice.
🌡 Environmental Sensors
Temperature, humidity, pressure and environmental monitoring modules.
- BME280
- BMP280
- SHT31
- AHT20 and AHT21
🌬 Air Quality Sensors
VOC, particulate, carbon dioxide equivalent and indoor air quality monitoring.
- ENS160
- CCS811
- SGP30
- PMS5003
- MH-Z19B
☀ Light, Colour & UV
Visible light, ultraviolet, infrared and spectral measurement modules.
- BH1750
- TSL2591
- AS7341
- AS7331
- VEML6075
📏 Distance & Motion
Distance measurement, movement detection and automation projects.
- HC-SR04
- VL53L0X
- VL53L1X
- RCWL-0516
- PIR sensors
⚡ Electrical Measurement
Measure voltage, current, resistance, power and analogue signals.
- INA219
- INA226
- ACS712
- ADS1115
- Current transformers
☢ Radiation Detection
Geiger counters, ionising radiation sensors and radiation monitoring projects.
- SBM-20
- J305
- M4011
- SI-29BG
- ESP32 Geiger counter projects
🧲 Magnetic & Position
Hall effect sensors, compasses, magnetometers and position feedback.
- A3144
- QMC5883L
- HMC5883L
- Rotary encoders
🌍 GPS & Navigation
Position, speed, heading, altitude and satellite navigation modules.
- NEO-6M
- NEO-M8N
- GPS antennas
- Compass modules
📡 Wireless & IoT
Connect sensors using Wi-Fi, Bluetooth, LoRa and short-range radio.
- ESP32
- ESP8266
- NRF24L01
- LoRa
- Bluetooth modules
Every Tutorial Is Built for Practical Use
- Sensor specifications explained clearly
- Pinout and wiring information
- Arduino and ESP32 examples
- Library installation steps
- Serial Monitor output examples
- Calibration and accuracy notes
- Common problems and fixes
- Project ideas and comparisons
- Links to suitable modules and parts
Latest Sensor Guides
New tutorials will appear here automatically as the sensor library grows.
The first sensor guides are being prepared. Check back soon.
Built for Makers, Learners and Curious Minds
Whether you are building a weather station, robotics project, radiation detector, home automation system or a Star Trek-inspired tricorder, Practical Answers Hub is here to help you turn a small sensor module into something genuinely useful.