An Arduino Knight Rider Rainbow dice that uses WS2812B RGB LEDs

An Arduino Knight Rider Rainbow dice built using a clock by Davide Gironi: This project implements a Knight Rider / Rainbow effect Random Selector. It uses an Arduino UNO and a WS2812B RGB led strip. A friend of mine needs a random selector for train scale model. I’ve developed this using the Arduino framework, because […]

An isolated analog output for Arduino Uno

Giovanni Carrera writes: This project completes the series of my articles about the Arduino analog I/O with the aim to use it as a controller of small automation systems. In control systems of the industrial plants it is always advisable to isolate both the inputs and the outputs coming from the field. This prevents disturbances […]

Understanding Arduino UNO hardware design

Yahya Tawil over at All About Circuits has published an article on Arduino UNO’s electronic design and better understanding of its hardware: This article explains how Arduino works from an electronic design perspective. Most articles explain the software of Arduinos. However, understanding hardware design helps you to make the next step in the Arduino journey. […]

Arduino Uno R3 graphics accelerator shield uses no pins

Andy Brown has written an article detailing his Arduino graphics accelerator open source project: This project brings together the knowledge that I’ve gained over the last few years to bring you a graphics accelerator for the Arduino Uno R3 based on an ARM Cortex M0 core attached to a 640×360 LCD from the Sony U5 Vivaz […]

DIY lithium battery charger shield for Arduino

Abdulgafur Mujdeci over at Electro-Labs has published a new project a DIY lithium battery charger shield for Arduino: In this project, we are building a programmable single/multi cell lithium battery charger shield for Arduino. The shield provides LCD and button interface which let the user set the battery cut-off voltage from 2V to 10V and charge current from […]

Introducing CT-UNO, Cytron version of Arduino UNO

Vincent informs us of this Arduino compatible CT-UNO, the Cytron version of Arduino UNO: The CT-UNO combines the simplicity of the UNO’s Optiboot bootloader (which load program faster), the stability of the FTDI and the R3 shield compatibility of the latest Arduino UNO R3.   Besides, we know many are using Android phone which comes with USB micro-B cable […]

Measure RPM – DIY portable digital tachometer

Electro18 posted a tutorial on how to make a portable digital optical tachometer using an Arduino Uno,  an instructable here: A tachometer is a device used to measure the RPM or Revolutions Per Minute of any rotating body. Tachometers can be contact based or non-contact ones. The non-contact or contact-less optical tachometers usually use laser or Infrared […]

Hard disk drive clock with Arduino Uno

ACVoltage  wrote this instructable detailing his DIY POV clock using hard disk drive and Arduino Uno: This is a fun project that can be done easily and also cheaply. In this instructable we will explain step by step how to make this beautiful POV clock. Used material: -Arduino Uno, -Tiny RTC modul, -ULN 2003, -IR diode and IR transistor […]

Arduino Uno 3 million samples per second logic analyzer

Bob Davis has built an Arduino powered three Million samples per second six channel logic analyzer: In the video below you can see what the live display looks like. He is using a 74 series decade counter to divide down a 10Mhz crystal so that he has some nice fast stuff to sample. He experimented […]

Arduino Uno quality control

Moogle was disappointed by his new Arduino Uno. He thought it was pretty unrefined: rough edges, thin solder mask, poorly aligned headers. Arduino responded directly that this is an isolated incident. They will replace any less than perfect hardware. (A Moogle followup post) Additionally, bongobat may have encountered a major bug in the circuit that […]