----- Original Message ----- From: "Vic Lopez" To: Sent: Wednesday, June 26, 2002 1:54 PM Subject: PIC: PIC AND ULTRABRIGHT LEDS > Hello Friends, > I am planning on working on a project that involves a pic 16F84 > controlling ultrabright LEDS. I know these leds require more voltage ( > and I assume more current). Do you have any advise on how to appraoch > the PIC/LEDS interface? Off course, I'd be using the I/O pins of ports > A and B. Thanks for any suggestions. Vic > Depends on the the implementation. Will each pin be driving a single LED, or will they be arranged in a matrix? What are the current and forward voltage ratings for these LED's? Are you running the LED's off a +5Volt supply, or some other voltage? Is there the possibility that ALL LED's will be lit at once, or will only one at a time be lit? Will the LED's be full-on, or modulated? If modulated, what is the approximate duty cycle and frequency? How many LED's, and would you prefer discrete transistors or packaged drivers? Is there a data sheet for these LED's, and have you read it? Is there a data sheet for the PIC16F84, and have you read it? Is there a good reason to use a 16F84, and not a more capable, more current, less expensive alternative? What is the current life expectancy of the question mark key on my keyboard? Also, please arrange the topic line as described at the bottom of this message. I fixed this one. > > > > > ********************************* > Get your free E-Mail and Homepage > Go to http://www.networld.com > ********************************* > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads