Post by thread:[PIC]: LED brightness using ADC

Grr. Re-sent with the correct tag, sorry. Hi all, I've put another page on line with a description and example code for controlling the brightness of LEDs using analog input to the ADC, rather than controlling the current to the LEDs. I use the ADC value to set up TMR0 to call an interrupt function that turns the LEDs on and off at a variable duty cycle determined byu the position of a variable resistor connected to the ADC input. I've used this with both directly-driven LEDs and with a large array driven by 2n2222 type transistors, all with no current limiting resistors for the LEDs. The page is at: http://www.botkin.org/dale/led.htm Hope someone finds this helpful. Dale --- The most exciting phrase to hear in science, the one that heralds new discoveries, is not "Eureka!" (I found it!) but "That's funny ..." -- Isaac Asimov -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email spam_OUTlistservTakeThisOuTmitvma.mit.edu with SET PICList DIGEST in the body