This simple Linear circuit provides continuously variable regulated current (~25-400mA) from a 4-6 Volt source. I chose a linear design for simplicity, reliability, ease of repair, and to avoid switching EMI in my Cave Radios. The circuit requires only 0.2V headroom above the parallel LED Array voltage to provide regulation at maximum current. The headroom stays low until the LED’s are extinguished at about 0.75V/cell for 4-cell packs.
Read more original source:
http://radiolocation.tripod.com/LEDdimmer/LEDlampDimmer.html
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This entry was posted on Friday, June 13th, 2008 at 3:54 pm and is filed under dimmer, LED Flasher, Lighting.
