Blog

Casio caclulator bidirectional Arduino communication - data logging, remote control, and more

MikeNZ

A discovery from 2007 fully exploited in 2026 - hacking the Casio calculator serial protocol The Arduino Uno is the board most schools already own for senior classes. Using these as cross-curricula sensor units requires adding a display, a keypad, SD...
- 28 Aug 2026
~50 µA ESP-NOW Outside BME280 Node; with LoRa Wake on Radio, part of three node "Heating System Monitor IV"

AB9NQ-William

Project: Heating System Monitor IV Why use Heating System Monitor IV? Answer questions your thermostat can't. A thermostat knows the setpoint. HSM IV knows what the system actually did: how many minutes the blower ran today, how long ...
- 1 Aug 2026
HC-SR04 ultra sonic sensor working with Arduino Uno PLC server

SensoredHacker0

www.youtube.com/watchMy project is so cool, but i have nothing to say about it. it was a pain to get this thing working. I figured it out. No one wants to hear I wired it wrong, I put the HC-SR04 on pins 9,10, only to figure out that ...
- 21 May 2026
ESP32-S3, SX1262 LoRa with Duty Cycle, Wake on Radio, and Deep Sleep

AB9NQ-William

GitHub project "EoRa PI Foundation" receiver has 175 µA average current consumption using SX1262 LoRa Duty Cycle and Deep Sleep. Current measurement images; done with Nordic Power Profiler Kit II. Project is a web based, remote load cont...
- 30 Aug 2025
Maccanum Robot Wireless

fabiolus

project: https://github.com/Fabiolus2020/MaccanumRobotWireless video demo: https://youtu.be/EJizb6qZtrU controller sketch //Fabiolus 2021/07/23 #include <SPI.h> #include <nRF24L01.h> #include <RF24.h> RF24 myRadio(8, 9); // CE, ...
- 25 Jun 2025
Arduino Nano and Sabertooth driver motor v2.0 Servo Library

fabiolus

https://github.com/Fabiolus2020/ArduinoNano_SabertoothDriver_ServoLibrary_1Joystick_2Motors demo video https://youtu.be/ejlvw2Omj_Q Project#5 using xervo library 1 x Arduino Nano 2 x led 2 resistor 1kOhms 1 x joystick 1 x sabertooth 2x25 vers...
- 24 Jun 2025
Arduino Uno Pololu VNH 5019 Motor Shield using 2 Motors and 1 Joystick and 2 Xbee for wireless communication

fabiolus

This video demonstrates how to wirelessly control two DC motors using two Arduino Unos. One Arduino acts as a controller with a joystick and XBee module, while the other acts as a receiver with a motor shield and XBee module. The video shows the conn...
- 24 Jun 2025
Arduino and button keeping variable in memory for multiple cases

fabiolus

https://github.com/Fabiolus2020/ButtonKeepingValuesForMultipleCases sketch 1: PushButtonKeepingValue2cases.ino const int buttonPin = 7; // the pin that the pushbutton is attached to int buttonState = 0; // current state of the button int ...
- 24 Jun 2025
Pedro Robot

ensei

Pedro 2.0 is a fully open-source project, designed to be accessible and customizable for everyone. It’s easy to assemble no screws, no glue, no tools required! Perfect for makers, students, and educators looking to explore robotics and program...
- 4 Mar 2025
Little work [Hey, smile ]

me_Cris

Hey, smile! Hello everyone!I made a small project with LEDs and a MAX7219 matrix. The blue board contains an ATMega8AU-TH (but it should work with any ATMega8-AU), I bought several ICs, cheap of course (I don't think I need to advertise the website),...
- 11 Sep 2024
Sabertooth Dual Motor Driver

Hallowed31

This is code I cooked up in the Arduino Forum a few days ago to help someone who wanted to hack their kid's Powerwheels/Peg Perego 2WD ride on toy using a Sabertooth 2x60 motor controller. I was never happy with Dimension Engineering exampl...
- 13 Aug 2024
Integrating Arduino with MQTT for IoT Applications

Shawn_will617

What is MQTT, and how is Arduino combined with MQTT for Internet of Things applications? These questions may have crossed your mind after reading the title. In this article, we will learn how MQTT (Message Queuing Telemetry Transport) uses low-bandwi...
- 30 Jul 2024
Working router with PoE support

embeddedguy

Created and installed rpi4 based router to access internet. This also has PoE hat on it.. Introduction Recently, I was having a need for a router or a wifi range extender. Because, the high speed internet in my home router was not connec...
- 10 Jul 2024
Adding more Storage to an Arduino: Using 8-pin SPI Flash Memory Chips

shabaz

Table of Contents Introduction Simple Read Example Erasing Flash Simple Write Example What’s the Purpose? Connecting the SPI Flash Arduino Flash Library Simple Demo Code Flash Monitor / Programmer Menu access Python access Summary Int...
- 10 Jul 2024
Control 28BYJ-48 Stepper Motor with ULN2003 Driver and Arduino

rachna34

A stepper motor is an electric motor that moves in discrete steps. Each step is a fraction of a full rotation, and the motor's position can be controlled precisely without the need for feedback systems. This makes stepper motors hi...
- 5 Jul 2024
How to Control 28BYJ-48 Stepper Motor with ULN2003 Driver and Arduino

rachna34

A stepper motor is an electric motor that moves in discrete steps. Each step is a fraction of a full rotation, and the motor's position can be controlled precisely without the need for feedback systems. This makes stepper motors highly...
- 5 Jul 2024
Speed Controlling of DC Motor Using MOSFET

Rithik_Krisna

DC motors power everything from toothbrushes to robots. Controlling their speed and direction is crucial. In this project, we'll use an Arduino, a potentiometer, and a MOSFET transistor to control a DC motor. Our versatile, low-cost design can al...
- 13 Jun 2024
Automatic Fire Detection and Extinguishing Robot Using Arduino

Rithik_Krisna

Despite numerous precautions, fire accidents still occur, risking human lives during rescues and firefighting. With advancements in robotics, we can now replace humans with robots for firefighting, enhancing efficiency and safety. In this project, we...
- 31 May 2024
Dekatron Spinner Z502s with Arduino Beetle

Steve524

Just a fun simple project using the Arduino Beetle and a Z502 Dekatron tube to create a simple spinner out of this classic display tube. The design of the circuit was adapted from the circuit diagram I attached from "Dekatron Drive Basics M. Moo...
- 23 May 2024
Automatic cat door with Arduino interface and PLC

Steve524

This project is not entirely Arduino, but I think it is a good example of how Arduino's can be incorporated into other systems. The initial design of this project was to automatically open and close the cat door and track the cat's activity a...
- 23 May 2024
Old Battleship Phone With Arduino UNO

Steve524

This is an old restoration project of an old battleship phone which I retrofitted with an Arduino UNO and a BCD MP3 player module. The front of the phone has a selector switch which I tied to the inputs of the Arduino which then sends a BCD code to t...
- 22 May 2024
Nixie Tube Clock With Arduino Mega 2560

Steve524

This project started with an old nixie tube display rack and an Arduino mega 2560 with DS1307 RTC. The nixies are driven with the SN74141 BCD to nixie drivers. This project was a lot of fun to build it also has a temperature and humidity sensor DHT11...
- 22 May 2024
Arduino Library Creation and Testing Workflow

shabaz

Table of Contents Introduction Library File Structure Examining the Library Code Megatest Header File Megatest Source File Additional Code Files Example .ino File Properties File Testing the Library on a PC Main code Faking Arduino Library Func...
- 17 May 2024
serial convertor

powerelec

Hi Looking to see if anybody in interested in doing a project for me I am trying to convert a 2 wire serial stream of different protocols data consisting of bcd address pulses and values coming in and display the various data parts and to...
- 19 Apr 2024
Build a Traffic Light Controller with Arduino Uno R4

rahulkhanna

Traffic lights are an essential part of our daily commute, keeping intersections safe and organized. But have you ever wondered how they work? In this blog, we'll embark on a fun project: building a basic traffic light controller using an Arduino U...
- 21 Mar 2024