Pi-Ener-lite: Compact UPS with Fuel Gauge and RTC for Raspberry Pi Zero
Pi-Ener-lite is a compact UPS for Raspberry Pi Zero with a CW2015 fuel gauge, DS1307 RTC, and 18650 battery support, all connected via spring-loaded pogo pins.
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Arduino UNO R4 WiFi: A Guide to Sensors and Displays
Learn how to use the STEMMA QT/Qwiic connector on the Arduino UNO R4 WiFi to connect I²C sensors and displays, with a custom adapter board and example code.
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75 GPIO on a Single Board: The IOX-77 Beats the Arduino Mega with Wi-Fi
The IOX-77 is an ESP32-C3-based development board that packs 75 GPIO pins into a compact 71 × 42 mm PCB, using five RISC-V CH32V003 microcontrollers on an I²C bus for parallel execution and expandability.
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Automated Mini Greenhouse with ESP32 and Sensors for Home Assistant
Build a compact smart greenhouse with an ESP32-C3 Super Mini, environmental sensors, and actuators, all integrated with ESPHome and Home Assistant for real-time monitoring and automation.
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A DIY Hovercraft based on Arduino Nano
It is probably the most incredible project you will see today. This is a totally in house built Hovercraft with the air cushion built with garbage bags. At the base of everything there is an Arduino Nano that controls the different motors with various ESCs with different current ranges. There is a 20×4 character i2c…
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A mechanical 7-segment clock
We are used to seeing clocks with 7-segment displays which, through the switching on and off of some LEDs, form the numbers. This project is different, in fact instead of the LEDs we find stepper motors that, by setting the rods in motion, allow the visualization of the numbers as if it were a classic…
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How to Make Non-Touch Automatic Door Open-Close System
The purpose of this project is to automatically open the door by detecting body temperature. In fact, this project is to prevent patients with new coronary pneumonia from entering their homes. To a certain extent, guarantee the safety of the living environment. The following parts were used in this project: Arduino UNO, 2004 I2C…
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I2C car with Attiny85 and M5StickC controlled by Blynk
In this project we see how to create an I2C system to control motors using a DigiSpark Attiny85 plus an Arduino shield. To test its operation we made a small RC car that uses an M5StickC and connects to the Blynk app to communicate via the I2C protocol. We used two communications in this project…
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DC Wattmeter Using Arduino Nano (0-16V/0-20A)
Hello friends!! I am here to show you a DC wattmeter which can be made easily by using Arduino nano. One of the main problems I was facing as an electronics hobbyist is to know the amount of current and voltage applied across the charging circuits I made. I thought of buying one meter…
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ESP32 walkie-talkie
In this project we see how to make a walkie-talkie using an ESP32; audio data is transmitted via UDP or ESP-NOW transmission. So the Walkie-Talkie will work even without a WiFi network! The system is based on an I2S microphone and an I2S amplifier, but it will work equally well with analog microphones and headphones…
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Versatile I/O Extender PCB to Control Many Nixie Tubes With I2C
This video shows the circuit in operation. In this case the microcontroller is an INTEL Edison, and the display shows time, date, temperature, humidity, pressure and rain fall in sequence by holding and releasing the button. More info
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Interfacing of seven segment display with Arduino Uno
In this tutorial, we are going to learn how the seven-segment displays work. We will then discuss the interfacing of the 7 segment display with the Arduino Uno. More info
