Mid-Power LEDs Offer Less Expensive Alternative for Lighting Applications

An entire product and manufacturing infrastructure was built at the start of this decade in anticipation of demand from TV manufacturers for LED backlighting. TV makers were under extreme price pressure from consumers and demanded the LED makers came up with inexpensive backlighting solutions. (See TechZone article “LED Backlighting Enhances LCD TV Picture Quality.”) To support the nascent LED TV sector, th ...

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Introducing Maker – Michael Shiloh

“Teach me to make” as simple as it sounds is a simple yet powerful effort on wordpress by a maker from USA. Apart from being a true maker, Michael Shiloh is an absolutely delightful and an approachable person to talk to. His sense of purpose in his work was very much apparent in my short, yet interesting conversation with him. Here are some widely and less known things about the teacher, student and entrepr ...

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Time-based OTP with Arduino

One-time-password (OTP) and its time-based version (time-based OTP, or simply TOTP) are commodity solutions to provide a second factor, in addition to simple passwords, for authentication. Here Jose Damico proposes his way to implement a simple TOTP device using only open-source tools. The core of the project is an Arduino board connected to a small LCD. From the software perspective, the SHA-1 library come ...

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DIY Skee Ball Machine

The skee ball machine is a wonderful thing. The simple experience of rolling a ball into a target is so freakishly satisfying that I used to play as much as I could as a kid at the local amusement park/mini-golf course. The sound of the rolling ball on the ramp, the pop as it launched in the air, and the bouncing as you hoped it would hit the 50 or even the 100. So when the idea for doing a bigger project c ...

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DC-DC HV Boost Converter

Step 1: Operation and Electronics Intro How Does A Boost Converter Work? Basic Principal: A boost converter works in two stages, ON and OFF. In the ON stage the Semi-conductive Switch is conducting and current builds up in the inductor producing an electromagnetic field, this field stores energy. In the OFF stage the Semi-conductive Switch does not conduct and the electromagnetic field collapses. When the f ...

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The Dryer Messenger using Arduino

The dryer in our house is in an out-of-the-way corner where it’s hard to hear the buzzer. When we miss it, the clothes sit in the dryer getting wrinkly, so we start the dryer again, don’t hear the buzzer again … it’s an endless cycle. After what seemed like the thousandth time, my wife quipped, “I wish the dryer could just tell us when it’s done.” I had just started playing with Arduino, so I thought a Drye ...

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Wearable Fabric on the Arduino Store

We are happy to announce the first wearable kit on the Arduino Store . This kit has been made by Plug’n'Wear specifically for us. All fabrics in this kit are produced in Italy, and strongly related to a textile family business. If you want to get deeper into the story of this product have a look at Riccardo Marchesi presentation (still in Italian, soon to be traslated!) at World Wide Rome 2012. Read over fo ...

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LED Shoulder Pads

For this project, I was inspired by my best friend. She had been wanting some disco-fabulous armor-inspired wearable technology for music festivals and costume parties for some time. I took a pair of construction/gardening knee-pads and turned them into glitterific shoulder pads that shine bright with 50 LEDs that are Arduino controlled! This project was super fun to make! SO SPARKLY! Step 1: Materials and ...

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Homebrew Arduino Pulse Monitor

Movies look cool with those EKG (electrocardiogram), the one that beeps and detects heart activities. A few months ago, we had to shoot a hospital scene for our school project. We needed an EKG instrument. To keep the movie authentic, we didn't want to fake the readings so we made the next best thing, a pulse monitor. Since my dad is a doctor he gave me some advice to design the pulse monitor. Let me clarif ...

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Using Copper Tape To Create A Digital Selection Pad using Arduino

This is partially me sharing this technique, and partially me learning how to use Instructables. If there are issues with my documentation of the technique or my use of Instructables, please let me know in the comments - thanks! I needed a long row of switches in a pinch, and didn't have nearly enough switches in my tool box for this project. This is a way to use copper tape to create many switches, quickly ...

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RC remotes and Arduino: a tutorial

Nick Poole, from SparkFun, proposes this nice tutorial, where detailed instructions on how to connect a radio-controlled (RC) remote to an Arduino board are described in great details. RC remotes are very simple controller, typically used to wirelessly control electrical rovers, cars and planes. Depending on the number of degrees of freedom required by the application (e.g., X and Y movement), an equivalent ...

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How to Create an Arduino Compatible Bluetooth 4.0 Module

I had been looking for a cheap alternative to some of the Arduino Bluetooth devices I'd seen, which in my opinion are overpriced. Redbear's Mini: $39.95 (Note: This is a uC and BLE combo). Redbear's Uno Shield: $29.95 BLEDuino: $19.95 (if part of Kickstarter) Bluegiga Shield: $69.95 After seeing these, I thought I'd try to make one; this is my bumbling process for making an Arduino Bluetooth 4.0 device at h ...

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