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Re: Fading LEDs using a PWM signal from the Edubot
It occured to me that you should be able to try the code (posted above) without an external driver because IFI has built in the current limiting resistors on the PWM outputs. Just attach the LED cathode (shorter of the two leads) to the ground pin and the anode to the PWM 1 or 2 outputs. If you don't have a potentiometer to hang on analog input 1, alter the code in user_routines.c to just ramp up the value in CCPR2L (or CCPR3L) from 0 to 255 and you'll notice the LED's brightness change from off to full brightness. Hopefully someone will take this code and come up with some really cool lighting effects for their 'bot. One idea that comes to mind is to have multiple arrays of different color LEDs underneath the 'bot providing a light show during the competition.
-Kevin
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Kevin Watson
Engineer at stealth-mode startup
http://kevin.org
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