Sensor guidesExplore
Sensors
Pinouts, wiring diagrams, and working code for every common sensor — for Arduino, ESP32, and Raspberry Pi.
Maker reference & project hub
Build, simulate & learn Arduino, ESP32 and Raspberry Pi
Step-by-step projects with wiring diagrams and code, verified pinouts, a component library, free calculators, and a circuit simulator — everything you need from your first blink to a connected build.
Popular references:ESP32-S3 Pinout Guide: GPIO, Dual ADC, Native USB, and PSRAM Pins ExplainedESP32-C6 Pinout Guide: GPIO, ADC, LP Core, and Matter-Ready Radios ExplainedArduino Uno R4 Minima Pinout: Every GPIO, ADC, DAC, and Op-Amp Pin ExplainedArduino Uno R4 WiFi Pinout: Every GPIO, ADC, DAC, and ESP32-S3 Pin Explained
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The workbench
Start with something worth building.
Practical projects and clear reference guides to help you go from an idea to a working circuit.
Featured buildesp 32Advanced
I Built a Retro Gaming Console Using ESP32 and OLED Display 🎮
Build your own handheld mini console with ESP32, play classic games like Pacman & Tetris and learn embedded development in a fun way.
Open project
Tutorial
MicroPython I2C on ESP32: Scan for Devices and Fix 'No Device Found'
Before any OLED or BME280 works, the board has to see it. Run an I2C scan, interpret the addresses, pick pins and track down the usual causes of an empty scan.
9 min read Tutorial
ESP32 MicroPython Weather Web Server: Live DHT22 Readings with Auto-Refresh
Turn sensor readings into a live page and a JSON endpoint, refresh without reloading, cache readings so the sensor is not polled too fast and show clear stale-data status.
17 min read Explore
View all Find your next build
1ESP32I Built a Retro Gaming Console Using ESP32 and OLED Display 🎮
678 3
2ESP8266Control an LED Over Wi-Fi Using NodeMCU ESP8266
568 0
3MegaArduino Mega 2560 LED chaser Tutorial for Beginners.
551 2
4UnoGetting Started with Arduino Uno R3 — LED Blink Guide
529 0
5UnoBuild a Weather Station & Clock with Arduino Uno (DHT11 / DHT22 + RTC Module (DS3231 ) + LCD 16x2)
490 0
6UnoHC‑SR04 Ultrasound Distance Measurement with Arduino – Parking Alert (LCD & Buzzer)
457 0
Learn by board
Pick your hardware
Arduino
Explore →⚡
BeginnerOLED Weather Station with BME280 & Arduino Uno
18m
⚡
BeginnerAutomatic Plant Watering System with Arduino & Soil Sensor
20m
⚡
BeginnerUltrasonic Parking Sensor with Arduino Uno
14m
⚡
Beginner4-Digit 7-Segment Counter with TM1637 & Arduino
16m
⚡
BeginnerArduino RFID Door Lock with Access Log & LCD Display
10m
IntermediateHC‑SR04 Ultrasound Distance Measurement with Arduino – Parking Alert (LCD & Buzzer)
20m
+1 moreView all →Espressif
Explore →Raspberry Pi
Explore → Circuit Simulator Early stage
Simulate circuits right in your browser
Wire up boards and test code with no hardware needed. Explore a growing workbench for microcontroller circuits, with reusable projects, wiring, code, and serial tools. The simulator is open source and actively evolving.
Start here
Pick a path that matches your level
STEP 0114 projects
Beginner
LEDs, buttons and your first sensors. No prior experience needed.
- OLED Weather Station with BME280 & Arduino Uno18m
- Automatic Plant Watering System with Arduino & Soil Sensor20m
- ESP32 Plant Watering System with Soil Moisture Sensor & MQTT9m
STEP 0216 projects
Intermediate
Wi-Fi, displays, motors and dashboards — combine parts into real devices.
- Arduino Mega LED Matrix Scoreboard with MAX721922m
- ESP32-CAM Sensor Monitoring with Blynk: Readings and Status15m
- ESP32-CAM Face Detection Security Camera with Motion Alerts14m
STEP 036 projects
Advanced
Cameras, MQTT and multi-device systems with serious wiring and code.
- Battery-Powered ESP32 Weather Display with Deep Sleep40m
- ESP32 Home Automation Node with MQTT & Home Assistant35m
- ESP32 Smart Home Automation with Relay & Telegram Bot Control20m
Quick reference
Pinouts & cheat sheets
Keep these open while you wire — every pin, voltage and gotcha in one place.
Guide
ESP32-S3 Pinout Guide: GPIO, Dual ADC, Native USB, and PSRAM Pins Explained
16 min read
Guide
ESP32-C6 Pinout Guide: GPIO, ADC, LP Core, and Matter-Ready Radios Explained
15 min read
Guide
Arduino Uno R4 Minima Pinout: Every GPIO, ADC, DAC, and Op-Amp Pin Explained
11 min read
Guide
Arduino Uno R4 WiFi Pinout: Every GPIO, ADC, DAC, and ESP32-S3 Pin Explained
13 min read
Guide
ESP32-CAM Pinout: Every GPIO, Free Pins, SD Card & Flash LED Explained
15 min read
Guide
Raspberry Pi Pico W Pinout: Every GPIO, ADC, and Wireless Pin Explained
10 min read
Reference library
Everything a maker needs in one place
Learn
Learn Electronics
Master electronics from fundamentals to advanced embedded systems.
Electronics Basics
The core building blocks every maker needs — voltage, current, and components.
11 articlesExplore
Electrical Basics
Mains power, wiring, and protection devices — the electrical side of the workbench.
10 articlesExplore
Circuit Theory
The analysis techniques used to solve and simplify any circuit.
7 articlesExplore
Tutorials
Hands-on, step-by-step guides for tools and techniques on the bench.
5 articlesExplore
Instruments
Bench equipment explained — what it does and how to read it.
5 articlesExplore
Why SolderHub
Everything between idea and working circuit
Build-ready projects
Wiring, schematics and tested code in every guide, from beginner to advanced.
Simulate first
Wokwi embeds in projects plus our own browser circuit simulator — test before you solder.
Component library
Pinouts, specs and example code for sensors, displays, actuators and modules.
Free calculators
Resistors, power budgets, PWM, pull-ups and more — no sign-up needed.
FAQ
Common questions
What is SolderHub?
SolderHub is a maker reference and project-sharing platform for Arduino, ESP32, ESP8266, Raspberry Pi and related boards. It combines step-by-step projects with wiring and code, pinout and component guides, calculators and a circuit simulator.
Do I need hardware to get started?
Not to begin. Many projects embed a Wokwi simulation, and the SolderHub circuit simulator runs circuits in your browser, so you can test wiring and code before buying parts. The simulator is still early-stage and improving.
Where should a complete beginner start?
Start with the Beginner projects, keep the pinout guides open while you wire, and use the calculators for values like resistors. Each project lists the parts and code you need.
Which boards are covered?
Arduino boards such as Uno and Mega, ESP32 and ESP8266, and Raspberry Pi, with more board families being added. Browse them all on the Boards page.
Can I share my own project?
Yes. Use Submit a project to add your guide with schematics, code and an optional Wokwi simulation. Submissions are reviewed before they are published.
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Community
Share your project with the community
Submit a guide with schematics, code, and a SolderHub Simulator project — join the makers already featured on SolderHub.