Tag Archives: Projects

Make the Raspberry Pi Read Analog Inputs

You might have noticed, the Raspberry Pi (RBPi) does not have any inputs for reading analog signals, unlike the PIC, AVR or the Arduino micro-controllers. This is because the RBPi is a digital only computer. Since many sensors generate only analog signals, it would be nice to make the RBPi analog-friendly by giving it some analog inputs. Letting RBPi acquire some analog inputs is easy if you use the MCP3008 chip from Microchip. Since the RBPi does not have a built-in Analog to Digital Converter Read more [...]

Automate Your Home HVAC System from the Internet Using the Raspberry Pi

The HVAC devices in your home, typically the air-conditioner, thermostats, heating and ventilation, use one or more remote handheld devices working on Infrared (IR) technology. As the HVAC devices are from different manufacturers, you will most likely own a multitude of remote devices, making it difficult to handle and set each of them independently. However, with the Raspberry Pi or RBPi, a small board called the IR Remote Shield and a wireless interface, you can control all the HVAC devices Read more [...]

Energy Harvesting – How & Why

What Is Energy Harvesting - Why Is It Needed? The process of extracting small quantities of energy from one or more natural, inexhaustible sources, accumulation and storage for subsequent use at an affordable cost is called Energy Harvesting. Specially developed electronic devices that enable this task are termed Energy Harvesting Devices. The world is facing acute energy crisis and global warming, stemming from rapid depletion of the traditional sources of energy such as oil, coal, fossil Read more [...]

Combining online and offline: the future of cash registers

Hate going shopping in person but don't want to buy everything online? Consider the future of shopping where cash registers will not just be able to ring up your purchases, but be able to tell you what other items would match the sweater you're buying that day....including a review of your past purchases. Love the idea or hate it, that is the future of brick and mortar checkout. Combining the online catalog with a streamlined checkout process, the goal is to help you shop smarter, better and of Read more [...]

How to Jailbreak an iPad

Jailbreaking an iPad If you have an iPad, you may be intrigued by the thought of jailbreaking it. Jailbreaking a device permits you to install and use third party applications and utility programs. In the case of a jailbroken iPad, you would be able to then run apps like Adobe Flash which is not available through the Apple OS, or access files like you can on a PC. One app that caught my eye was the multitasking app which would allow you to run multiple programs without having to save/close Read more [...]

Make an inexpensive & simple UV LED Torch

From our friends at instructables comes an easy project for use with UV LEDS. To make this simple project, here's what you'll need: 2 Ultra Violet LEDS 1 1/4W resistors (the value of the resistor needs to be calculated based on the forward voltage of the LED you use) 1 non-working 9V battery (or a 9V battery clip) 1 new 9V battery Pliers Solder Soldering equipment The full instructions on the Instructables site will show you how to put everything together. Once assembled, the light snaps Read more [...]

How to Make Your Own LEDS? Whooooooooa

I found this how-to today on the great Popular Science web site. Now that I've read through the article - I am amazed that I've never seen these instructions written up before. Theodore Gray, who authors their popular "Gray Matter" column, gives the full scoop on the basic materials used to construct LEDS and provides the basic instructions needed to see just how LEDS work. OK, it is not so easy to find some synthetic silicon carbide (carborundum) laying around, but surely everyone could Read more [...]

Circuit Bending

Have you ever taken apart a kid's electronic toy to see how it worked? Maybe tried to cut the wires or rewire the circuitboard? That's how circuit benders begin their hobby. Circuit bending is the creative, short-circuiting of electronic devices such as low voltage, battery-powered guitar effects, children's toys and small digital synthesizers to create new musical or visual instruments and sound generators. One of the most popular toys to circuit bend is the "Speak n Spell". Here's a great Read more [...]