Learn how to build an ESP32 WhatsApp notification system using CircuitDigest Cloud API. Send real-time sensor alerts to your phone, no SIM card, no WhatsApp Business API needed. Step-by-step tutorial with code.

Learn how to build an Arduino game controller with our complete DIY guide. Includes circuit diagram, Arduino code, wiring instructions, and USB setup. Free GitHub code download.

A professional-looking VFO for your radio projects without spending a fortune on touchscreen, rotary encoder or complex hardware.

Follow this easy guide to create scrolling text on an I2C LCD display with Arduino UNO and Visuino. Includes circuit, code, and video walkthrough.

PyPortal Art Display.

Learn how to set up two NRF24L01 senders and one receiver on Arduino boards, program them in Visuino, and wirelessly share temperature and humidity readings.

Learn how to use the Seeeduino XIAO Expansion Board with an ultrasonic range sensor and add a sound warning. Step-by-step guide with Visuino code.

In this blog we will explore the general design that can be used to create a wireless two player game, like Run Along, Jump & Jump. We will start with the basic game design, focusing on how the core game functionality works in both single player and two player versions.

Create a dual‑sensor weather station that sends indoor/outdoor temperature & humidity wirelessly via NRF24L01 modules to an Arduino UNO and displays data on an

Learn to read TVOC, CO2, hydrogen, ethanol, temperature and humidity from SGP30 and DHT11 sensors on an Arduino UNO. Display data on an OLED using Visuino.

Learn how to make a simple device for monitoring the state of the ionosphere and the quality of shortwave signals using the CA3089 chip.

Step‑by‑step guide to show changing text on a MAX7219 8‑digit LED display using Visuino and an Arduino UNO. Includes circuit, code generation, and demo video.