I was wondering what circuit was best. I choose B but I'm not sure if you want more voltage or more current through the diodes. I feel C is redundant as diodes are the same. This question continues with solving the chosen circuits resistors for Ic = 20+-5 mA, using E12 series resistors. I have done this for B getting 220ohms(210 calculated but not E12) and 4.8k(5k calculated).
I have a couple more questions:
-Is the voltage drop across a blue LED around 1.8V like other LEDs?
-Are 220ohm and 4.8k resistors E12 series? I've never heard of E12 series before but I assumed it meant the standard types we ues in labs.
I have a couple more questions:
-Is the voltage drop across a blue LED around 1.8V like other LEDs?
-Are 220ohm and 4.8k resistors E12 series? I've never heard of E12 series before but I assumed it meant the standard types we ues in labs.
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