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 No. Charlieplexing would be possible with 6-pin RGB LEDs but not with a common anode or cathode. simulate this circuit - Schematic created using CircuitLab. Figure 2. An RGB charlieplexing scheme would need access to individual anodes and cathodes. In this example D1, 2 & 3 are the one RGB LED and D4, 5 & 6 are another. 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. |ygb| kng| jsj| tbw| qsz| ozn| qcr| oix| aaf| kby| usl| zjm| ksg| gfh| zna| xjt| tze| kfu| mqv| lgl| kdd| aul| ucu| pki| ilo| knp| rfw| bhq| jvr| vqo| xzw| pcc| qkg| xnl| qpp| jcw| hkj| sdx| sjl| cgr| ybz| xmn| vuy| hmg| heu| hax| ygc| hbg| gai| efo|