I have a few basic questions. I'm thinking about ordering these: https://www.sparkfun.com/products/9264First, what is forward current (20 mA for each color) vs peak forward current (30 mA)? On the datasheet they appear under "absolute maximum ratings", but I'm assuming 20 mA is what I should be aiming for?Second, it says it has a voltage drop of 2.0, 3.2, 3.2 V respectively across R,G, & B. How do I take this into account when designing a circuit? Say I have a 5 V power supply, and want to connect 3 of these in parallel (so technically 9 total, since each RGB LED acts as 3 LEDs...?). Does it change the V=IR equation?Assuming they should each run at 20 mA (if I understood the datasheet correctly like I asked above), does that mean the resistance within each diode would be calculated by:red: 2 V = 0.02 * RR = 100 ohmsgreen & blue (each): 3.2 V = 0.02 * RR = 160 ohmsFinally, if that IS the case, do I need to take into account those resistance values in the circuit? So:red: 5V = 0.02 * (R1 + 100) R1 = 150 ohm resistor is neededgreen & blue: 5V = 0.02 * (R2 + 160)R2 = 90 ohm resistor is needed for eachOr am I totally off? Please help, so confused...
red: 2 V = 0.02 * RR = 100 ohms
I'm thinking about ordering these: https://www.sparkfun.com/products/9264 (link fixed, moderator)
what is forward current (20 mA for each color) vs peak forward current (30 mA)?
I only understand how to use V = IR, so I'm confused when the power supply has both a V and an I rating.