Application: I have an Orangerx transmitter in which I am "customizing". I am using a stand alone atmega328 to read the potentiometer values from the tx via the adc's. I will then take those values and manipulate them based on the goal of the output. I will then send a "potentiemeter" value using a 12bit digital to analog converter that communicates to the atmega328 via i2c.
Problem: the circuit I have setup has the atmega running on 3.3v at 8mhz with its internal oscillator. I burned its bootloader and program it via aruino uno as isp. I ran a simple blink led on pin 13 sketch and it works on a breadboard at 5v but not 3.3v. But my circuit runs on 3.3v and not 5v.
any suggestions are welcome cheers!