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Driving 1W LEDs - help with circuit please

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steveclv

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I have a PIC (PIC16F688) based controller circuit that drives an LED flasher. The PIC can only handle about 9mA per LED and that is fine for typical LEDs - however for my intended application (the machine guns in the wings of a Radio Controlled Spitfire) I want to use some high power 1W LEDs (3V, 100mA drive)

Now I am clueless when it comes to designing circuits although I do understand how circuits work when drawn out and so I'm hoping someone can give me the basics of what I need to be able to use the PIC output to drive a transistor to switch the voltage needed for the high power LED

I'm assuming that I need some resistors and some PNP transistors but how do I calculate the values? I'll build the circuit on a bit of breadboard and there are 8 LEDs involved, each driven from a separate output line of the PIC

Can anyone help please?
 
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