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  1. Cuckoo1

    and smaller!

    Very interesting article Ante, thanks. I'm sure Bardeen and Brattain would't have imagined this in their wildest dreams!  ::)
  2. Cuckoo1

    laser lights

    Hi You may have already built that 5V supply but... I recently found some ready made very easy to use switching regulators made by Texas Instruments (Powertrends to be more specific). They do operate at 24V, have outputs of 5V, as you need, and adequate output currents. What is even better is...
  3. Cuckoo1

    Barrier potential discrepancy

    Sure there is current before 0,7V! As you see in the equation the built-in voltage depends on doping (and temperature) so you can play with it to some extent by controlling the doping. Not to mention that electron-hole recombination is a statistic phenomenon and therefore when you say 0,7V it...
  4. Cuckoo1

    Barrier potential discrepancy

    Hi Kevin In a pn junction in equilibrum, where p and n regions "touch", majority carriers from each region recombine with majority carriers from the other region. That is: free electrons from the n region recombine with holes in the p region and holes from the p region recombine with free...
  5. Cuckoo1

    Silicon Photonics

    Hi all We all know that due to its indirect band-gap, silicon is not a suitable semiconductor to manufacture optoelectronics. Having a Silicon light source (LED or LASER) though, would come in very handy in today's technology, especially in telecommunications. There is a decade or so that...
  6. Cuckoo1

    urgent (counter question)

    Hi all. well Kevin it is not exactly like that. Normally you build counters using flip flops. According to how you will connect the clocks of your flip flops, you can get a sync. or an async. counter. You have a syncronous counter when all clock inputs of the flip flops are connected to a...
  7. Cuckoo1

    LCD graphic controllers (EPSON)

    Hi dtsormpa If you haven't found it already, all the necessary information to do this is here: http://www.erd.epson.com/vdc/html/contents/S1D13504.htm There are many interface examples with 16-bit microprocessors. Ok, it's for the S1D13504 but I guess driving the rest of the controllers of the...
  8. Cuckoo1

    Power MOSFETs

    Hi everyone. Power MOSFETS do consist of many little MOSFETS connected in parallel. These are called "cells". For given die dimensions, companies will try to fit as many cells as possible (they connect in parallel so as to drop the drain - source resistance), while keeping a reasonable gate...
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