Typically I see a LED circuit consistng of the LED and a current limiting resistor in series with a power supply.
Why, and when are current limiting regulator circuitry used? In these new LED flashlites, is it just a LED, resistor and (4) AAA cells, or is there some active components required?
Thanks,
Why, and when are current limiting regulator circuitry used? In these new LED flashlites, is it just a LED, resistor and (4) AAA cells, or is there some active components required?
Thanks,