Gandledorf
New Member
First off, thanks so much to all of you who have helped me with my questions, I hope to be able to share some of what I know with you in time, and what I am learning with the new comers.
I am trying to calculate the wattage required of a resistor used to limit the current flowing to an LED. My circuit is roughly:
**broken link removed**
V_signal is connected to the output line of a uC, which is pulsing in the KHz range. I'm not 100% sure what my required pulse width will be, but just for starters lets say 50%.
The max current through the diode ought to be around 1 Amp with the current setup (correct?), now given that watts = amps * resistance, this means that where the current to be continuous, I'd need a 5W resistor. I'm guessing though that I only need to meet the average wattage? So only 2.5W?
Further more, if I split up the resistance into two 2.5 ohm resistors, does each only need to be 1.25W, and so on?
I am trying to calculate the wattage required of a resistor used to limit the current flowing to an LED. My circuit is roughly:
**broken link removed**
V_signal is connected to the output line of a uC, which is pulsing in the KHz range. I'm not 100% sure what my required pulse width will be, but just for starters lets say 50%.
The max current through the diode ought to be around 1 Amp with the current setup (correct?), now given that watts = amps * resistance, this means that where the current to be continuous, I'd need a 5W resistor. I'm guessing though that I only need to meet the average wattage? So only 2.5W?
Further more, if I split up the resistance into two 2.5 ohm resistors, does each only need to be 1.25W, and so on?