Hey
How can one determine the brightness of an led when charlieplexing.
Im looking at charlieplexing anywhere from 30-50 leds. Im going to be using a pic micro.
Lets assume that each pin can source/sink 20mA. And the pic has an xtal of 20Mhz so the clock is really at 5Mhz.
How long would the led be on, in order to receive max brightness ?
Any thoughts ? I'd rather not do it trial and error, and if i can get an idea or a start, it can help reduce trial and error time.
How can one determine the brightness of an led when charlieplexing.
Im looking at charlieplexing anywhere from 30-50 leds. Im going to be using a pic micro.
Lets assume that each pin can source/sink 20mA. And the pic has an xtal of 20Mhz so the clock is really at 5Mhz.
How long would the led be on, in order to receive max brightness ?
Any thoughts ? I'd rather not do it trial and error, and if i can get an idea or a start, it can help reduce trial and error time.