sensors

Quantum dot image sensors set to change camera industry

Quantum dot image sensors set to change camera industry

By Sean Michael Ragan

Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I am a long-time contributor to MAKE magazine and makezine.com. My work has also appeared in ReadyMade, c't – Magazin für Computertechnik, and The Wall Street Journal.

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Those of you who, like me, just recently managed to score the digital camera of your dreams will be very excited to learn that it’s possibly going to be obsolete real soon. Based on technology developed by University of Toronto professor Ted Sargent, who is now CTO at start-up InVisage, the new image sensor uses a matrix of nanoparticles embedded in a polymer film which can be simply “painted” onto the top of a low-cost wafer at room temperature. If the hype is to be believed, the new sensor offers four times the sensitivity of conventional CMOS image sensors at a dramatically reduced cost per chip. [Thanks, Glen!]

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Brilliant low-tech soil moisture sensor

Brilliant low-tech soil moisture sensor

By Sean Michael Ragan

Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I am a long-time contributor to MAKE magazine and makezine.com. My work has also appeared in ReadyMade, c't – Magazin für Computertechnik, and The Wall Street Journal.

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Two galvanized nails set in a plug of plaster-of-Paris. That’s it. The Cheap Vegetable Gardener, who created the sensor for an automated grow box project, explains:

Technically a gypsum block measures soil water tension. When the gypsum block is dry it is not possible for electricity to pass between the probes, essentially making the probe an insulator with infinite resistance. As water is added to the problem more electrons can pass between the probes effectively reducing the amount of resistance between the problem to the point when it is fully saturated where the probe has virtually zero resistance. By using this range of values you can determine the amount of water than exists in your soil.

[via Hack a Day]

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Turning a motor into a sensor with the Peppermill

Turning a motor into a sensor with the Peppermill

By Brian Jepson

Brian Jepson

I'm a tinkerer and finally reached the point where I fix more things than I break. When I'm not tinkering, I'm probably editing a book for Maker Media.

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Nicolas Villar sent me a sample of the PepperMill, a new sensor board he and Steve Hodges designed at Microsoft Research in Cambridge, UK. It’s a nifty little board. You attach a DC motor and the board can an output voltage when the motor is turned, and analog signals telling you the direction and speed of the motor. It turns a DC motor into a rotary encoder, of sorts.

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Tilt sensor tutorial on adafruit

Tilt sensor tutorial on adafruit

By Gareth Branwyn

Gareth Branwyn

Gareth Branwyn is a freelance writer and the former Editorial Director of Maker Media. He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor to Boing Boing, Wink Books, and Wink Fun. His free weekly-ish maker tips newsletter can be found at garstipsandtools.com.

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Limor has posted another installment of her exceedingly excellent sensor tutorials, this one on that most marvelous of switches, the tilt sensor. When you just have to know which end is up, you need to strap on one of these puppies. Here’s how. Sensor tutorials – Tilt sensors! More: Force Sensitive Resistor (FSR) tutorial Ladyada’s […]

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Gyrating Arduino with Motion Plus

Gyrating Arduino with Motion Plus

By Gareth Branwyn

Gareth Branwyn

Gareth Branwyn is a freelance writer and the former Editorial Director of Maker Media. He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor to Boing Boing, Wink Books, and Wink Fun. His free weekly-ish maker tips newsletter can be found at garstipsandtools.com.

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knuckles904 writes [by way of adafruit]: Ok so I, after much research, have been able to read the gyro data of the new Wii Motion Plus peripheral with the Arduino microcontroller. With this code and the code previously developed for the Wii Nunchuck, we are able to create a 6 DOF IMU for under $40. […]

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