In my application, i am using arduino mega 2560.
Application is like this…
Over the serial communication i am getting some numeric data, which i am converting in binary and writing it on IO ports.
For powering and serial communication, i am using USB cable, which gives me around 4.8 v (Approx 5 v).
I want 3.3 v , on output pins as i have total 5 port on which i want to write.
One option i have found is using ULN2803 IC, But for 5 ports i need total 5 IC which will make the board little bulky.
Is there any option available,by which i can get the 3.3 v on output pin.
I have read some where if we power up the arduino by 3.3v power supply, then it will generate 3.3 v on output pins.
Please suggest some solution for serial communication and 3.3v on output pins.