How about jest a 5 volt zener diode in series and a a small capacitor after it to filter out noise?
Jeff
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10e12 furlongs per fortnight.
adapting 12vdc to 9vdc
Jan 18, 2012
45 Replies
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is an adjustble 3A buck regulator for less than $5. It's a switch mode power supply, so it won't generate a lot of waste heat.
You can't have a sense of humor, if you have no sense.
and more searching on ebay for "LM2596" gives you the same board for $2.5 shipped ... and agree it does not generate waste heat ! but they don't seems to search for a smart solution...
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Kripton
the ESR Repository @ http://kripton2035.free.fr/esr-repository.html
the Geiger Repository @ http://kripton2035.free.fr/geiger-repositor.html
Whatever. A simple, adjustable switcher that doen't need any design work to use is a good idea for people who aren't equipped to design a power supply from scratch.
You can't have a sense of humor, if you have no sense.
And those who think they can't etch a circuit board, order the parts from Digikey at single unit prices plus shipping, build/test it for less than $2.50.
Just because you can, doesn't mean you should.
Is
and
the
Unless you plan on building a lot of them. I've worked in electronics manufacturing, and it's not as simple as most people think. We had three reflow ovens, a preheat cabinet and a 10 * 40 foot room where boards were cleaned. First, in a commercial board washer, then inspected and cleaned by hand, if needed. Most components don't go cheap, if you buy under 1000 at a time. Some at 5,000 and others at
50,000.
You can't have a sense of humor, if you have no sense.
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