Age is just a number. It's written on the back of my hand in case I forget.
Since I pay as little attention to the polis as possible, I've not noticed them getting younger.
What is a sign of increasing age is that electronic components are getting smaller ( Read more... )
What is a sign of increasing age is that electronic components are getting smaller ( Read more... )
Comments 14
There's an excellent IEEE paper on the history of the 2N3055 (I keep meaning to turn it into a wiki article). Full of stuff about how the originals were practically hand made. How the wafers used to stick together after the oven and had to be prised apart with a prybar or lever. With a quick dunk in hydrofluoric acid if they were being sticky. How they don't make them any more (real ones are called 2N3055H, if you can find them) and the modern sort aren't as bulletproof, even though they have the same ratings. How there's a knock-off trade in fake ones, made by paralleling up a couple of other bipolars inside that big roomy can - which works fine until there's any sort of thermal runaway kicking off with current hogging.
About £8 each, if you can find them.
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I knew I was getting on when the tools for fiddling with all these embedded boards had to include a nice magnifying glass.
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Still, circuit works as breadboarded, so now it's out with the veroboard...
... I wonder if there's a CAD package?
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http://veecad.com
http://www.heyrick.co.uk/software/verodes/
http://www.marlwifi.org.nz/other/stripboard-magic
and most promising from a hacking pov
https://code.google.com/p/diy-layout-creator/
I have to get https://plus.google.com/110944853355774677851/posts/FSEsGtZnodd onto a board and innabox sometime.
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Mind, the other thing I can't immediately find is more stripboard that's been pre-cut to look a lot like a breadboard.
I know yon shop above will sell (or would, had they any stock) the Adafruit version, but...
And a pony, please. A robot one with an owl.
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