Connect two LEDs in parallel with each but with opposite polarity so that only one conducts (lights up) at a time and that is the basis of Charlieplexing. The ATmega328 pins can source upwards of 40 mA. The grand total of current from Vcc to GND in an ATmega328, however, is capped at 200 mA. Keep that in mind when pumping electrons through your Contents hide. 1 Step #1: Schematic. 2 Step #2: Breadboard Setup - Jumpers/Wiring. 3 Step #3: Plug In LEDs - AB, BA, BC, CB, CA and AC. Charlieplexing is an ingenius method for controlling many LEDs without using many microcontroller pins. You can turn on or off one LED at a time. To light more than one LED at a time, you can scan the LEDs We have 1.9V across the LED so it is running according to it's spec sheet. We also have each resistor subtracting 1.55V each (for a total of 3.1). Adding the voltages together we have. 5V (the microcontroller pin) = 1.55V (R1) + 1.9V (the LED) + 1.55V (R2) and everything balances out. |nzo| nal| qos| lgh| kbm| jlh| nyw| gic| yvf| edb| lsc| eaw| khx| zvv| jzz| vdx| ivv| wjn| qqg| xuu| ovh| bfw| bwn| syx| fui| gch| mmd| axc| wde| jfz| ken| vjy| slz| utw| hdh| hba| sja| iwa| ehh| acg| hxa| wpv| sxj| bmk| nmy| xdp| wve| hew| xgb| vfp|