mike | Shared With: Everyone - Jul 14 2009 | science, electronics, memristor, physics, resistor, capacitor, inductor
An interesting article about the discovery of a new type of electrical device. Based on the equations relating charge and magnetism, Leon Chua deduced that the mathematics of electric circuits was missing an element (one that directly relates charge to magnetic flux) - he dubbed the missing element a memristor.
Now scientists believe they have found a physical device that has this effect ... at nanoscales. The device could have some amazing applications for computation.
Quoted: What connects human intelligence to the unsung cunning of slime moulds? An electric component that no one thought existed, explains Justin Mullins
mike | Shared With: Everyone - Oct 16 2008 | microcontroller, electronics, josh kopel
mike | Shared With: Everyone - Oct 14 2008 | buglabs, hardware, devices, kit, electronics
mike | Shared With: Everyone - Aug 25 2008 | buglabs, gnomedex, electronics, kits
mike | Shared With: Everyone - Jun 01 2008 | led, lighting, controller, electronics, mit
John Torode's company makes and LED lighting controller!
Quoted: EZ-Color?High-Brightness LED Controller Revolutionizing Lighting Design. Design with no C or Assembly code with PSoC Express? Control up to 16 LED Channels with up to 32-bits of resolution. Flexible Analog and Digital resources allow you to go beyond just color mixing design. PrISM Modulation Technology.
mike | Shared With: Everyone - Feb 27 2008 | midi, rock band, electronics, kit, diy
mike | Shared With: Everyone - Feb 27 2008 | rock band, drums, midi, electronics, kit
mike | Shared With: Everyone - Dec 03 2007 | fan, cooling, home theater, electronics, heat
What product am I excited about this year? My Tivo Series 3? My new BlueRay player? No. It's a tiny little cooling fan from Middle Atlantic. When I first had equipment installed in my living room, we had it all nicely hidden away in a built-in cabinet. DVR's (e.g. Tivo), Satellite receivers, and DVD players can all generate a significant amount of heat. When placed in an enclosed cabinet they are unable to stay cool enough to prevent the heat from damaging the components.
After frying a couple of pieces of equipment, we had Home Technologies install the CAB-COOL fan in the side of the cabinet. What I love about it is that it has an integrated thermostat that lets it spin slower and keep the fan noise to a minimum. Installation is simple and self-contained and our equipment now stays nice and cool.
mike | Shared With: Everyone - Apr 09 2007 | electronics, microcontroller, led, circuits
This seems pretty clever - controlling N*(N-1) LED's from just N available output pins from a micro-controller (as opposed to N led's for direct drive, or (N-A)*A for row/column addressing).
However, with a decoder, seems like you can get exponentially higher than this: 2^N is possible for a clocked circuit which can latch the LED address (but the chip count goes up).
So for 5 pins:
Direct: 5 LED's
Row/Column: 6 LED's
CharilePlexing: 20 LED's
Decoder: 32 LED'sFinally, you can can an "infinite" number of LED's driven through a serial interface. So - with "1 pin" you should be able to drive a clocked shift register to control a very large number of LED's (e.g., with 1 100 element shift register, full the registered rapidly in burst mode, and then pause to let a capacitor charge next to each LED).
I wonder if you can buy 3-wire modular LED's with built-in shift register and capacitors so you can hook these up like fully controllable "Christmas tree" lights.
mike | Shared With: Everyone - Feb 22 2007 | jellyfish, video, electronics, shopping, deals, slingbox
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