AVR microcontrollers are a popular choice for use in a wide range of applications, including embedded systems, robotics, and more. They are known for their low cost, versatility, and efficient use of resources, which make them an attractive choice for many developers. If you are working with AVR chips, you will need a programmer to burn programs onto them. One option for an AVR programmer is the USBtinyISP, which is a simple and low cost solution based on the attiny2313 microcontroller.