Revision history of "BJT LED Current Source"

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  • (cur | prev) 08:05, 4 January 2012‎ Dye (Talk | contribs)‎ m . . (443 bytes) (+443)‎ . . (Created page with " This is a very common LED current source. The LED current is set by R2. The formula is usually 0.7/R2. In this case the current is set to 20mA. 0.7 is the gate voltage of Q2. Q1...")
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