Paper Instruments

What are the paper instruments made of? Using Conductive Paint, we were able to create a paper piano & guitar that plays notes and changes graphics on a screen. Paper Piano Arduino Code Step by step - Paper Instrument Development Software needed Processing: https://processing.org/ Capacitive Arduino Library:http://playground.arduino.cc/Main/CapacitiveSensor?from=Main.CapSense 1. Draw paper piano Use con ...

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Modular DIY Geiger–Müller counter

The Geiger–Müller counter is a relatively simple tool to measure ionizing radiation. To increase sensitivity, construction presented here contains three (instead of one as usually) soviet STS-5 lamps. This is important for measurements of natural sources of (low) radiation like soil, rocks (an article about my trip with Geiger–Müller counter on Śnieżka mountain). When high voltage (typically 380-420V) is ap ...

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Zeitfluss – Flow of Time

About this project Reasoning about time by printing onto the surface of a river Maybe you know situations when time's running up. In German there is a metaphor for that and translated it would be something like "time trickles away“. Having this saying in mind and thinking of how to 'imagine' time the following idea turned up: I would like to generate a situation, where people are able to let time pass by wi ...

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Industry’s Most Sensitive MEMS Mic

PORTLAND, Ore. — In its rush to get to market "while the iron is hot," Vesper Technologies Inc. (Boston) has announced what it still claims is the industry's highest signal-to-ratio (SNR) for a high-definition (HD) microelectromechanical system (MEMS) microphone, even though it is scaled back to 68dB rather than the astounding 70dB SNR MEMS mic they previously promised. "Our roadmap now calls for the 70dB v ...

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Raspberry Pi teams up with an Arduino

The principal behind ArduinoPi First a little clarification, the ArduinoPi isn’t really a library or a command set or an out of the box controller, its more a proof of concept using already know programming languages. If you want to use it be ready for some PHP, CSS, HTML, C++ and jQuery! The principal is as follows: The Arduino is connected as a slave device, meaning it waits for a command, execute it and ...

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IR remote tester

I have several times. My favorite technique was to take my mobile phone and with the camera pointed at the infrared emitter look for a flashing little purple light. The mobile phone technique is an way for testing the remote but still i decided to make a small circuit just to test the remotes. Ler mais: http://ruijc.webnode.com/products/testador-de-comandos-ir-remote-tester/ O circuito não necessita de muit ...

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Cracking an electronic safe using brute force

Preface There's nothing nefarious here, nor is the information contained herein particularly helpful to thieves or the dishonest. A thief would just cut the dang thing open and be done with it. The story So I bought a fire safe to protect some documents that I wanted protected in the unlikely event of a house fire. When I got the safe, I promptly emailed myself the manufacturer's code, set up an easily reme ...

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High quality bezel will provide professional look to your displays

Also can be added, that even in case you have a possibility to produce a suitable bezel, it can easily happen (especially at smaller batches) that it simply isn´t worth it. Design, prototyping,… all this costs something. On the other hand we have here a ready-made solution with true brass bushings and precisely designed spring clips. The result is an immediately usable bezel, while it´s only necessary to ma ...

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Drawing with a Laser – Hack-a-Day Logo

Reading Hack a Day I found an interesting challenge: drawing their logo somewhere. And the fact that was even more interesting: “preference will be given to the largest and smallest submissions“. I started figuring out how to do something like that with the things I had around, and settled for using a laser and two servos. Even though I missed the deadline for submissions, it became a very interesting proje ...

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TI introduces world’s first multichannel inductance-to-digital converters

Texas Instruments (TI) announced the world's first multichannel inductance-to-digital converters (LDCs). The four new devices in the LDC1614 family expand the innovative LDC portfolio, a data converter category that TI first introduced in 2013. The devices offer two or four matched channels and up to 28-bit resolution in a single integrated circuit (IC). [caption id="attachment_21305" align="aligncenter" wi ...

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Arduino Astronomical Clock

This product allows you to set separate turn-on and turn-off times and those repeat every day. The disadvantage of this product is that, as the seasons change, you need to constantly adjust the turn-on and turn-off times. As illustrated in Figure 1, the variation over the year (in sunset time in this example) is very significant even at my Northern California latitude, with almost three hours difference bet ...

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Charging batteries rapidly and safely

Any hobbyist can charge a battery quickly, but can you do it without an explosion, excessive heating or major degradation in battery cycle life?   Well many companies have managed fast charging techniques  that typically use specialized algorithms. These algorithms take into account the chemistry of the battery and some sort of non-standard charging rate curve. Many device manufacturers and wireless op ...

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