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Yup, low value resistor+lots of current = lots of power (heat) loss. Switching is the way to go. If you get creative, the power loss in the driver circuit can be cut down to almost nothing. A switched diode / capacitor combination would work quite well.
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this circuit is a nonsense. using a high power resistor is a proof of very poor efficiency !. Most of energy is used to produce HOT in the R.switching regulator is the right way... NCP3065 just a little bit more complexhttp://www.onsemi.com/pub_link/Collateral/NCP3065.PDF
can you suggest the best regulator ic for the same job? i need to drive a typical 5W power LED at maximum efficiency as a strobe. i'd really appreciate if you provide the circuit for the sameRegards and Thanks.
can you suggest the other regulator ICs for the same job ()? i need to drive a typical 5W power LED at maximum efficiency as a strobe.Regards and Thanks.
Could you hook up 2 DC motors and if so how?
i made it, the wire melted, it's overheat
why cant u put dot(.) instead of comma(,)it makes little confusing.... :/
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