Created simple project to adjust PWM duty cycle using a Pot connected to an ADC channel and as a bonus also send ADC value to the USART demoing how to send multi-byte values via serial.
Hope it helps someone.
AVR atmega8 1MHz
PWM from timer1
Compiler Imagecraft C (jumpstart C for AVR) v8
Code and project in Project section of this website
project name same as this post title
zip file with all project files and source code