Red Heart-Shaped Flash LED DIY Kit 18pcs LEDs

Description Red Heart-Shaped Flash LED DIY Kit 18pcs LEDs Circuit board with 1.5mm high-quality all-glass plate processing technology, the pad large, thick wire, fly line rarely (only 3), component layout and beautiful, copper surface using environmentally friendly antioxidant treatment. Using 9 SMD components, easy welding training and improve aesthetics. Suitable for Christmas, New Year, Chinese New Year, ...

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How to build a RaspberryPi Cluster

RaspberryPi was invented as educational device to inspire children to study computer science. Nevertheless, in a couple of years it has become the toy of computer scientists, engineers and curious of every age. This project is our successful attempt to build an educational RaspberryPi Cluster composed by one main node and eight computational nodes. In this post we try to explain step-by-step our work in ord ...

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How to make a DIY home alarm system with a raspberry pi and a webcam

Traditional wireless CCTV cameras are cheap but anyone with a wireless receiver can view your signal. On the other hand, IP cameras are secure but they can be quite expensive and usually the video quality is poor — unless you go for a really expensive model. Lately I wanted to install a home surveillance system so I chose to use a cheap Logitech webcam with Raspberry Pi and motion, an excellent linux progra ...

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*Preliminary* SPI on the Pi: Communicating with a SPI 3-axis accelerometer using a Raspberry Pi

Step by step guide on how to setup Raspbian, and communicate with a SPI device using bcm2835 SPI library (NOT bit banged!) This is still very preliminary... I need to add better pictures of physical hookup, and work through some of the awkward code.   Step 1: Starting with a blank SD card, download Raspbian image, and install onto SD card Visit http://www.raspberrypi.org/downloads for instructions on h ...

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DIY iPhone controller for Raspberry-Pi (OSC)

To start off this project I would like to explain how all this will work. We will be using a form of communication called OSC (Open Sound Control) and an app called "TouchOSC" which is available on the Google Play and Apple app store, along with pyOSC. What we will do is the following: - Create a suitable layout for the Touch OSC app to control the Raspberry Pi (will explain further as we go) - Upload the l ...

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Raspberry Pi – Revision 2 DIY Add-On Board

On the Raspberry Pi, there are several connections which can be used for expansion: 1,  The Rpi GPIO (General Purpose Input/Output) pins are exposed, that means that expansion boards are able to talk directly to the CPU. 2, The DSI connector will allow low-level interfacing with LCDs and other displays. 3,  The CSI connector will allow camera modules to be added in future. Step 1: Raspberry Pi single side D ...

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How to make your own portable Raspberry pi

This tutorial show you how to make your own portable rapsberry pi, with a screen, access to USB, Ethernet and HDMI ports open to access on the side of the case. This is by no means a good tutorial, it is simply a way of documenting how I built mine, in case your'e interested. With the exception of the case and the piece of wood, all of the components can be salvaged for other purposes if you so desire. Belo ...

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DIY tACS: Hardware for machine-human telepathy experiments

These are instructions for building a computer-controlled tACS device.Transcranial alternating current stimulation (tACS) is a form of neuronal stimulation that operates by running an alternating current through the human brain. This current can be any waveform from random noise (tRNS is the official research term if you want to be fancy about it) to a clean sine wave. There is some evidence that the brain' ...

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How to use interrupts with Python on the Raspberry Pi and RPi.GPIO

The latest big news in the world of Raspberry Pi Python GPIO programming is that Ben Croston has released an update for RPi.GPIO. Why is that a big deal? Because this version has interrupts. “What’s an interrupt?” I hear you say. It’s a way of waiting for something to happen without checking constantly whether or not it’s happening. Imagine that you’re waiting for a delivery – something you’re really excite ...

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How To Design a Printed Circuit Board with DesignSpark PCB

A couple of months ago I got curious about PCB manufacuring, and ended up using Joe Walnes' open-source PiCrust PCB design to test the process. I sent the 'Gerber' files off to a little cheap board house in China, and a few weeks later my boards arrived - and they actually worked! With my 100% PCB-related success rate still fresh in my mind, I decided that I wanted to try and design my own PCB from scratch. ...

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