Raspberry Pi – RGB LED conversion

I was looking at the cost of an Arduino and Ethernet shield and thinking that they are quite expensive compared with a Raspberry Pi.  So time to update my Arduino RGB LEDs project to run on a RPi. As noted all over the web the Raspberry Pi only has one PWM channel on the GPIO.  But there is a cool software PWM workaround called Pi-Blaster that does the business and opens up 8 channels of PWM, over kill for ...

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Section 3: Building the Turing Machine

Introduction In this project, we shall build a 3-symbol Turing machine using 11 bicoloured LEDs to represent the cells on the tape. Green represents a 1, red represents a 0 and a blank is represented when the LED is off. We shall call these the tape LEDs. The middle LED is labelled with a tape to identify it as the head of the machine. We will also have 6 pushbutton switches, 3 of them are operation switche ...

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Control an LED from your web browser or smartphone using Raspberry Pi

A first project – Internet controlled LED In this simple, inexpensive project you can connect a light emitting diode to your Raspberry Pi, and turn it on and off using any web browser. There’s even an app for Apple, Android and Windows smartphones. Prerequisites To run this you will need: A Raspberry Pi (with network connection) An LED (any colour) A resistor somewhere between 270 Ohm and 330 Ohm (the preci ...

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More Raspberry Pi Electronics Experiments – Gertboard and Potentiometer-Controlled LED Cluster

More Raspberry Pi Electronics Experiments – Gertboard and Potentiometer-Controlled LED Cluster Posted on February 3, 2013 by rakanalysis One of the things which alerted me to the potential of the Raspberry Pi as an electronics control system was the announcement of the Gertboard before the Raspberry Pi was released into the market. When the Gertboard was announced for sale in November 2012, it was fully my ...

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ICStation 4X4X4 Light Cube Kit for Arduino UNO

CSTATION 4x4x4 Light Cube kit uses 64 cuboid LED,and controlled by Arduino. Expansion board uses two 74HC595 shift register chips, using eight I/Os can light the 4x4x4 Light Cube,it’s hardware resources needed is less than other 4x4x4 light cubic expansion board(needs 20 I/Os to control). 1.Circuit Description The display part of ICSTATION 4x4x4 Light Cube kit consists of 64 cuboid LED,uses two 74HC595shift ...

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Interface LED with Raspberry Pi

Solution Connect an LED (see “Opto-Electronics”) to one of the GPIO pins using a 470Ω or 1kΩ series resistor (see “Resistors and Capacitors”) to limit the current. To make this recipe, you will need: Breadboard and jumper wires (see “Prototyping Equipment”) 1kΩ resistor (see “Resistors and Capacitors”) LED (see “Opto-Electronics”) Figure  shows how you can wire this using solderless breadboard and male-to-f ...

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Some fun with 16 RGB LEDs and a Raspberry 3.14159

RGB LEDs consist of a red, a green and a blue LED conveniently encapsulated in one package. Theoretically one such should be able to produce any colour of the rainbow, but I have restricted my project  - for reasons explained later - to just red, green, blue, cyan magenta, yellow and white. The project uses my 5 in 16 out Raspberry Pi interface. The output GPIO lines are 2, 3, 4, 17,27,22,10,9,11,7,8,25,24, ...

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Lighting an LED using a Breadboard & a Raspberry Pi

Lights, Jumpers & the Resistance – Jumper wires are typically 22 gauge solid-core wires with insulation pre-stripped and readied for insertion in or out. Resistors resist the flow of electrical current, thereby controlling WHERE and HOW FAST it flows. [Thought experiment: If controlling water, using thin pipes would let less water through but would flow through faster than a similar amount of water in a ...

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Controlling your Christmas lights with Text Messages

Step 1: Components needed An Arduino Yun (Wifi Enabled!) - You could use another Arduino with a Wifi Shield though. A Protoshield with (or without) a tiny breadboard a regular breadboard will work as well, but will be less compact. If you want to solder more, you can just use a small circuit board instead. A 5V relay A piezo buzzer Wires A battery operated Christmas decoration (It's not even Thanksgiving, s ...

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Knit an LED Cuff

This instructable uses circuit knitting and is written specifically for knitters. We'll cover how to create a circuit that uses blue and yellow LEDs, with instructions for hand and machine knitting. Electronic machine users can download the pattern file below to CNC print the knitting. ("Rose the Riveter" self-portrait with cuff by Angeleah Daidone. copyright Angeleah Daidone. All other images: Jesse Seay: ...

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