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Elecrow All-in-One Arduino Starter Kit Review - 20 Projects & 16 Modules
Pavleski Jul 24,2026
 This time I will describe a simple and practical way to enter the world of microcontrollers, specifically Arduino. Arduino is an open-source electronics platform that combines simple hardware (microcontroller boards) and software (Arduino IDE) to let anyone build interactive projects like robots, sensors, or smart devices. It’s widely used by beginners, hobbyists, and professionals because it’s affordable, easy to learn, and supported by a huge global community.  Namely, during t...
Arduino ESP8266 DIY
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Antenna (or whatever) Selector SHIELD for Arduino Uno
YU2ZZ Jul 21,2026
This shield was designed with no particular project in mind. It aims to be useful for both automatic and keypad-operated antenna selectors in general. This is just hardware, providing slightly more than a set of ten relay drivers, but there are many projects/sketches on the Internet (including my blog) that could be easily adapted to work with it. The shield could also help build other Arduino-based devices that will switch multiple loads on and off and may have nothing to do with amateur radio....
ham radio amateur radio
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Arduino-Based DSP Morse Decoder and Trainer
YU2ZZ Jul 21,2026
This real-time Morse decoder and trainer uses the Goertzel algorithm to detect a CW tone of 708 Hz. The program then analyzes the detected tone patterns in order to recognize and decode Morse characters.The decoding is flawless if the input signal is itself flawless in every aspect. The speed can exceed 50 standard words per minute (WPM). However, on the always noisy HF bands the decoder is clearly inferior to a trained human ear. Still, at any given time one will find real CW transmissions that...
ham radio amateur radio morse
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ESP32-Based Smart Sensor Node with Custom PCB Design
Lin Jul 20,2026
The original idea was to create a compact and reliable sensor platform that can be used for environmental monitoring, home automation, and remote data collection.Instead of using multiple development modules connected with jumper wires, I designed a custom PCB to integrate the controller, power supply, communication interface, and sensor connectors into one compact board.The goal of this project was not only to build a working device but also to practice the complete hardware development process...
ESP32 DIY ESP8266
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Chess Clock
Visaakan J Jul 18,2026
Project Overview:System Architecture & Control Logic:The ESP8266 acts as the central processor for the dynamic chess clock, orchestrating the entire match flow. It continuously monitors the game state and handles dual-player countdowns using non-blocking timing routines, ensuring the system remains completely responsive during rapid blitz games. The hardware layout features three dedicated tactile switches: KEY1 and KEY2 handle seamless turn swapping by instantly pausing one player's timer a...
Arduino ESP8266 DIY
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DIY LED Roulette Wheel | ESP32 C3 Project
Adhikari Jul 15,2026
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 on a random result and reports the final position using the Serial Monitor or via Wi-Fi.Trust me, there's a lot going on with this project ...
3D printing DIY USB
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ATS20 F-Board
Jul 14,2026
An ATS-20 Radio port in 3U height. Jumpers on the PCB lets the device be used as an Eurorack module or as a standalone all-band receiver.A regular 12VDC wall wart or a 9V battery can be used for standalone usage.https://github.com/Fihdi/ATS-20-Eurorack
Arduino Audio Radio
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Eurorack ATS20 B-Board
Jul 14,2026
An ATS-20 Radio port in 3U height. Jumpers on the PCB lets the device be used as an Eurorack module or as a standalone all-band receiver.A regular 12VDC wall wart or a 9V battery can be used for standalone usage.https://github.com/Fihdi/ATS-20-Eurorack
Arduino Radio
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AirMeter - Wireless Multimeter
BitsUndBolts Jul 10,2026
Let's Go Wireless! Since I make videos and use a multimeter from time to time, I wanted to show an overlay of the multimeter data for the longest time.My multimeter is an affordable DTM0660 based model (ANENG AN870) which doesn't support UART communication or any other sort of wireless transmission of the meter data.So, I decided to get the information directly from the 19999 count LCD display.Not only did this work better than I expected, it also turned into a journey of discovery!Decoding a mu...
Arduino ESP32 Raspberry pi
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Chippy V2: 150g Autonomous Combat Robot
רוזן יפה Jul 03,2026
About the ProjectChippy V2 is a next-generation 150g "Antweight" combat robot built to compete in combat robotics tournaments. Following the performance of the previous RC prototype (Chippy V1), the design is being completely overhauled for the upcoming summer championship. The goal is to build a fully autonomous combat robot that uses an Arduino microcontroller and an HC-SR04 ultrasonic sensor to actively detect and target opponents without requiring manual human steering.Link to the robot desi...
Arduino Robot Robotics
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