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Interfacing OLED Display with Arduino
Jain Sep 15,2026
OLED displays are a useful upgrade over traditional character LCDs when an Arduino project needs a compact graphical interface. Since OLEDs provide individual pixel control, they can display text, shapes, icons, graphics, and simple animations while maintaining a thin and lightweight form factor.In this project, I interfaced both I2C and SPI versions of a 0.96-inch 128×64 OLED display with an Arduino Nano. Both displays use the SSD1306 controller, making them a good choice for experimenting with...
arduino oled display embedded systems
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ARMduino UNO PY32F030
Sep 14,2026
# ARMduino UNO PY32## Project StoryWhat if the classic Arduino Uno kept everything that made it so popular, but received a much more modern MCU?That was the idea behind **ARMduino UNO PY32**, an open-source Arduino Uno-compatible development board based on the **Puya PY32F030K28U6**, replacing the traditional ATmega328P while keeping the familiar Uno ecosystem, pinout, shields, and modules.I wanted to experiment with how far the classic Arduino Uno design could be modernized without losing the s...
9th Project Design Contest-Open Theme DIY Development board
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Trident MCU Sandbox
Kumar Sep 12,2026
Trident MCU Sandbox This board is a combined version of Arduino Nano, ESP32 32E, Raspberry Pi Pico micro-controllers.Also has a battery holder and a battery protection plus charging circuit. Although you can charge it through a Mobile Charger BUT it is generally recomended to charge it through a Laptop. This board also features an adjustable Micro SD card slot, means you can connect the Micro SD card to any of these micro controller through jumper wires. Also have three OLEDs 1 for each mirocont...
Arduino ESP32 Raspberry pi
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Tiny contacts
Ghirardelli Sep 08,2026
Tiny ContactsAn ultra-compact 4-channel SMD relay board engineered for space-constrained IoT and home automation setups. Designed to interface low-power microcontrollers (3.3V/5V) with medium loads seamlessly.️ Key FeaturesUltra-Compact Footprint: Only 42 mm x 38 mm, perfect for custom enclosures and tight spaces.4-Channel Relay Control: Built with Omron G6K-2F-Y low-signal SMD relays for fast, reliable switching.Integrated Driver IC: Powered by the ULN2003A Darlington transistor array, protecti...
relay Arduino ESP8266
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Endstops Breakout Board
Brandi Sep 04,2026
If you've ever wired more than two or three limit switches to a microcontroller, you already know the pain: a rat's nest of resistors, a breadboard that shakes loose the moment the machine starts moving, and, worst of all, endstops that trigger randomly because of electrical noise picked up next to your motor cables.I hit this exact wall while working on a multi-axis project that needed six independent axes, each with its own Min and Max limit switch Instead of dead-bugging resistors and capacit...
Arduino Board Development Board
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Mini drill PCB_2026-08-28 FINAL
Aug 29,2026
It's an electric screwdriver. I made it because I unscrew things a lot and it makes my hands hurt. It uses a DRV module to spin the geared motor both directions to screw and unscrew. It requires a set of screw heads that have a hex bottom so that it fits. If it doesn't, you can 3d print your own.
Screwdriver Motor DRV8833
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KOTH-Timer — ESP32 King of the Hill Game Timer
J Aug 27,2026
KOTH-Timer is an Arduino Nano ESP32 based King of the Hill timer that I originally built for local Nerf events.The first version was just something I wanted for our own games. After using it at events, other people in the hobby started asking how to build one, which is what pushed me to clean up the design, make a PCB and put the project on GitHub.The timer is completely self-contained. It creates its own Wi-Fi network for the referee interface and does not need internet access during a game.How...
ESP32 Objective Arduino
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Reefwing Battery Monitor Shield for Arduino UNO, Fuel Gauge, Charger, and Programmable Load
Such Aug 23,2026
This shield is the hardware platform for the battery monitoring and logging project in Chapter 13 of Embedded AI: Run at the Edge (No Starch Press, 2026). The book uses battery state of charge as a running case study in exploratory data analysis and machine learning; this shield is the instrument that generates the datasets, charging, discharging, and gauging a single-cell LiPo under controlled conditions on an Arduino UNO R4 Minima.Estimating state of charge well is harder than reading a voltag...
reefwing nostarchpress embeddedAI
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LED Matrix hat for ATMega2560
Rehman Aug 22,2026
Why ATmega2560, not ESP32/Pi: WS2812B addressable LEDs need microsecond-precise bit-banged timing on the data line. Any platform running an OS or wireless stack (FreeRTOS on ESP32, Linux on Pi) can introduce scheduler/interrupt jitter that corrupts that timing mid-frame. The 2560 runs bare-metal — no radio, no scheduler — so the signal stays clean by construction, not by careful workarounds. It also runs native 5V logic, matching WS2812B's data voltage directly with no level-shifting required, a...
Arduino DIY LED
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DIY ARDUINO
ZAFAR Aug 19,2026
I designed and built my own custom Arduino Uno PCB using DIP components for easy soldering and understanding. It's built around the ATmega328P microcontroller, along with a 16MHz crystal, reset button, and LM7805 for 5V power regulation. Header pins are included for USB-to-Serial code uploading, and all I/O pins follow the standard Arduino pinout — working just like an original Arduino Uno
Arduino Hardware USB
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