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Build a Raspberry Pi Pico SDR Radio with Waterfall Display
Pavleski Sep 04,2025
 Software-defined radio (SDR) is a radio communication system where components that have traditionally been implemented in analog hardware (such as mixers, filters, amplifiers, modulators, and demodulators) are instead implemented by means of software on a computer or embedded system. The biggest advantage of SDR is its flexibility. Because the functions are handled by software, you can change the radio's behavior by simply updating the software.  This time I will present you...
Arduino ESP8266 Radio
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YourChess – Intelligent Interactive Chessboard
Sep 03,2025
YourChess is an intelligent interactive chessboard that combines 3D printing, custom electronics, and software into a unique gaming and educational experience. The board uses 64 Hall effect sensors to detect each move, while individually addressable WS2812B LEDs provide visual feedback. Players can enjoy Human vs Human games, or challenge a basic AI engine in Human vs AI mode.The project started as my graduation thesis and grew into a passion project. I wanted to create not only a functional pro...
8th Design Contest-Electronic Project 3D printing Arduino
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Mitsubishi ESPHome CN105 Microcontroller - PAC-USWHS002-WF-1 plug compatible
Sep 02,2025
Compatibility NoteThis version is plug compatible with the PAC-USWHS002-WF-1 and allows direct swap using the existing wiring. The WF-2 uses a smaller connector which would require an adapter cable to use with this project - instead click HERE for the WF-2 compatible module. Please ensure you have a WF-1 module if you plan on using this version of the board (the WF-1 has one (1) connector, the WF-2 has two (2) connectors). For more information on how to determine which version you have check ou...
Mitsubishi CN105 Arduino ESP32
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Zen Pilot - Intelligent Control System
Zen Sep 01,2025
Zen Pilot is designed so that all signals are read directly by the onboard microcontroller. This architecture eliminates the need for external readers, ensuring faster response times and more reliable signal management. External sensors can be connected through modular inputs, while the MCU processes the signals natively and controls the outputs via relays and opto-isolators.
8th Design Contest-AIoT Project Arduino IOT
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Arduino Voice-Controlled Car
Sep 01,2025
Introduction Arduino-based applications are widely popular among open-source hardware enthusiasts. Today, we will introduce an interactive Arduino voice-controlled car. The HLK-V20 is the voice-controlled module we will be using today. We chose the HLK-V20 because it is affordable. Of course, its voice recognition functionality is still quite good. In this case, the car's wheels produce a lot of noise during operation. Even under such interference, commands can still be heard within a short...
Arduino
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CV Generator
DIWHY Aug 28,2025
A 3x CV Generator for synthesizers. Outputs are -10 to +10V DC with about 20mA source/sink current. 8HP Euro form factor. Also a buffered one-shot 5V CV with a manual pushbutton for triggering events.The project uses an ATTINY 1624 MCU with the cool AnalogReadEnh() function to drive the OLED and do the AD conversion.More details in the blog post here.https://audiodiwhy.blogspot.com/2025/08/cv-generator-seems-working.htmlIf you build this module you will need 2 PCB's, the main board and a front p...
Arduino DIY Synthesizer
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Arduino Parking Assistant V3
Adhikari Aug 28,2025
The ESP32-C3 Based Parking Assistant is an advanced parking sensor system that utilizes the ESP32-C3 super-mini micro-controller to provide accurate distance measurements and parking assistance.This is the third iteration of my previously released parking assistant videos.This parking assistant system uses ultrasonic sensors to help drivers park their vehicles accurately by providing visual and audible feedback about distance to the obstacles.Components RequiredFor this project I am using an ESP...
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DIY Magnet Polarity Detector - How to Identify Poles with a Hall Sensor from a PC Fan
Pavleski Aug 27,2025
 Recently, while working on a project, I needed to determine the polarity of several permanent magnets of different shapes. At first glance, it seemed simple, bringing the magnets closer together to see if they attract or repel, but I still couldn't determine it precisely this way. So I came up with the idea of making a very simple electronic device that would display the poles of the magnets in a very elegant way with two LEDs with different colors for each pole. It can immediately be...
DIY USB Commodore
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Flood Detection and warning system using LORA and Arduino
Poudel Aug 27,2025
IntroductionFloods are one of the most devastating natural disasters, causing immense damage to life and property worldwide. Early detection and timely warnings play a crucial role in reducing risks and saving lives. This project, Flood Detection and Warning System using LoRa, leverages IoT technology, Arduino Nano, and LoRa communication to create a low-power, long-range, and reliable flood monitoring solution.ObjectivesDetect rising water levels in flood-prone areas.Transmit real-time ale...
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Mini Universal Card v1.5
Isaksson Aug 26,2025
That sounds like a very interesting and versatile development board! The Mini Universal board with Arduino Nano as the brain appears to be designed for industrial and IoT applications with all these features.Let me summarize what I understand the board includes:Communication:LoRa HC-12 module for long-range wireless communicationBluetooth for short-range communication433MHz wireless transmitterInputs and Outputs:Relay outputs for 12V industrial control12V industrial inputsDigital inputs and outp...
Arduino LED IoT
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A Modified zFlip 5
With many Samsung zFlip phones hitting the unfortunate fate of a broken folding screen, I took it as an opportunity to build my own silly phone. Taking only the minimum parts required for the phone to...
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