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Hi everyone, today I am going to show you how I made a "Digital Roulette Wheel" by combining ESP32-C3 Super Mini Microcontroller with the classic CD4017 CMOS decade counters.
When the button is pressed, the ESP32 sends "clock pulses" to the CD4017 IC, causing the LEDs to cycle. Releasing the button triggers a realistic slowing down effect until it stops ...

Imagine holding a device the size of a deck of cards that shows you every WiFi network nearby – their signal strength, security level, even which channel they use. Sounds like tech magic, right? But it's actually quite simple!

In this guide, we'll build a portable WiFi scanner using:

· A tiny but powerful ESP32-S3 microcontroller

· A bright 2-inch...

The Problem: Clean Water Access Without Grid Power

A non-profit approached us in early 2024 with a straightforward request: design a water vending machine that could operate in rural villages with no reliable electricity. The machine needed to dispense filtered water in exchange for RFID-based credits, run entirely on solar power, and survive dust, heat, a...

The existing system was a patchwork of standalone loggers with no central visibility. When a compressor failed on a Saturday night, nobody knew until Monday morning. Lost inventory, angry clients, the usual story.

The client wanted something modern, but not cloud-dependent. They wanted local control with remote access as a bonus. Matter protocol was the obvious choice —...

This project demonstrates a lightweight alternative by hosting the tracking interface directly on the ESP32 development board.

Using the Heltec WiFi LoRa 32 V4 and the REYAX RYS352A Multi-GNSS module, this browser-based GPS tracker receives real-time positioning data from multiple satellite constellations, displays latitude, longitude, and connected satellite count on t...