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Latest Activity: Jan 8, 2010

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Generate electricity with a candle

What you see above is a generator that converts heat to electricity. thermoelectric lamp is one of…Continue

Tags: thief, peltier, cooler, joule, sink

Started by Get Chu Some Entertainment Jan 8, 2010.

DIY 3d printing system

If you’ve ever dabbled in 3d modeling, creating a design from nothing is an outstanding feeling. If only you could somehow export it to the real world…but 3D printers cost thousands of dollars,…Continue

Tags: technology, printing, systems, 3d

Started by Get Chu Some Entertainment Dec 11, 2009.

Biz Tech HomeBrew Feedz

Reading 16 Rotary Encoders at the Same Time

We’re digging these daisy-chainable encoders built by [fattore.saimon]. Each module consists of a rotary encoder attached to a PCB with a PIC16F15386 on the back. As we’ve covered in the past, the Microchip released their feature-rich PIC16 microprocessor just this year, and it’s great to see them start to crop up in projects. With 4 address jumpers on the back of each PCB, [fattore.saimon] is able to connect up to 16 of the encoders on the bus. The modules also have male and female plugs so he can connect them physically as well, to simplify wiring. Each module also has …read more

Look what came out of my USB charger !

Quick Charge, Qualcomm’s power delivery over USB technology, was introduced in 2013 and has evolved over several versions offering increasing levels of power transfer. The current version — QCv3.0 — offers 18 W power at voltage levels between 3.6 V to 20 V.  Moreover, connected devices can negotiate and request any voltage between these two limits in 200 mV steps. After some tinkering, [Vincent Deconinck] succeeded in turning a Quick Charge 3.0 charger into a variable voltage power supply.

His blog post is a great introduction and walk through of the Quick Charge ecosystem. [Vincent] was motivated after reading about  …read more

Hassle-Free Classical Conditioning for Honey Bees

When you’re sick or have a headache, you tend to see things a bit differently. An ill-feeling human will display a cognitive bias and expect the world to punish them further. The same is true of honey bees. They are intelligent creatures that exhibit a variety of life skills, such as decision-making and learning.

It was proven back in 2011 that honey bees will make more pessimistic decisions after being shaken in a way that simulates an attack by varroa destructor mites. The bees were trained to associate a reward of sugar-water with a particular odor and to associate foul-tasting …read more

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