To connect a 12V relay to the Arduino you need the following things: – 1 Arduino – 1 diode for example 1N4007 – 1 NPN transistor for example 2N2222 (in the US) or BC548 (in Europe) – 1 relay for example one with coil voltage 12V and switching voltage 125VAC/10 A – 1 multimeter Step
Connecting a 12V relay to Arduino Continue Reading
MIT has developed a fantastic visual programming language called Scratch. It is also an amazing learning tool for children, because it is simple, cute, and by providing interaction with the real world by a board called “Scratch Sensor Board”. This Instructable shows the development of a shield for Arduino that can interact with Scratch and replicates the
Scratching with Arduino Continue Reading
I wanted to make it possible to control an arduino board from my phone. So that I could control other devices. the easiest way seemed to be using bluetooth. but when I received the parts needed I found it want quite as simple as I had hoped. And after looking on the Internet I didn’t
How to Control arduino by bluetooth from PC Continue Reading
Overview: This instructable will cover the building process of an 4x4x4 LED Cube. I will be using an Arduino to control the LEDs. Since the Arduino (Freeduino) has a total of 20 pins (including the analog pins) we will not need to have any multiplexing or shift registers. I will take you though what i
Arduino 4x4x4 LED Cube Continue Reading
I wanted to create something for my wife as a present and this is what I came up with. This is a dark activated color changing night light. It has a sensor that can tell when the room light is turned off. This then will light a RGB LED and slowly fade through different colors.
Color Changing Night Light with ATtiny using Arduino Continue Reading
In this project, you shall again use two sets of shift registers. These will be connected to the rows and columns of the dot matrix display. You will then show a simple object, or sprite, on the display and animate it. The main aim of this project is to show you how a dot matrix
LED Dot Matrix Display using an Arduino Continue Reading
Shield to control 6 relay, 6 digital input and 6 analog input with Arduino Duemilanove, Arduino UNO. The digital inputs and relay outputs are equipped with an LED that indicates the status. The circuit diagram is very simple: Step 1: Schematics and PCB In this step you can find the circuit diagram and the PCB
Simple Relay Shield for Arduino Continue Reading
Squirt is a motion activated water cannon using Arduino. This was designed for use in the garden but as it’s winter we tested it in the bathroom. It works! True motion tracking is expensive and complicated so this system activates when the victim moves into range and randomises the position of the cannon and the
Squirt – Arduino, motion activated water cannon Continue Reading
Problem: So my nutritionist (doesn’t everyone have a nutritionist) suggested I should increase my exercise which primarily consists of walking my dog. She even gave me a chart of activities and calories burned. Here’s an example. http://www.nutristrategy.com/caloriesburned.htm Well, being a LAZY OLD GEEK, I decided to monitor my walking electronically. Solution: It was a “long
Arduino Pedometer Continue Reading
A quick demo video for your pleasure. This is an instructable for a target practice system for airsoft and nerf weapons. The system has been designed to test a shooter’s reaction times and accuracy. Sam and I have been meaning to do this project for a while, and when the microcontroller competition opened, coinciding nicely with
Arduino Target Practice Continue Reading
Free Arduino projects, circuits, code and tutorials. Pick a board, pick a sensor, build something.
