If you don't like John's surface mount PIC suggestion, you can get a 14 pin DIP
microcontroller that is easier to solder, and fits in your solderless breadboard
for development and debugging. It is a 16 bit chip, running at 16 megahertz,
which is overkill for your application, but the nice part is that the development
system for it costs $4.30, and comes with two chips, plugs into a USB port, and
is very easy to use. I bought five of the development systems last week, and
even with shipping I was only out $25.
And, sometimes having a bunch of extra pins is nice for things like debugging,
extra 10 bit A/D converter pins, maybe a cheap display, or whatever.
Oh, and the chip itself has an integrated temperature sensor, and a calibrated
internal oscillator, so you can save some more on external parts.
But it is 11 cents over budget at $0.61 in single unit quantities.
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Get a free science project every week! "http://scitoys.com/newsletter.html"On Sun, Apr 22, 2012 at 12:40 PM, John Griessen <john@industromatic.com> wrote:
On 04/22/2012 02:16 PM, Andreas Sturm wrote:US http://search.digikey.com/us/en/products/PIC10F204T-I%2FOT/PIC10F204T-I%2FOTCT-ND/718268
A microchip for 0.5$ ??? Where do you get it from? China? US?
Use FETs. They handle that level of power if switched quickly by the 50 cent micro and cost $0.25.
A relaise, that can stand 1A is not as cheap as you said, at least in my country. I looked for the cheapest components.
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