AVR programmer

So, the scheme of the robot is laid out, and what to flash? The simplest programmer ISP AVR to COM port


On the left are the COM port pins, on the right are the AVR microcontroller legs. From the programmer to the controller, the wire must be no longer than 10-15cm, otherwise it will be buggy due to interference.
You also need to apply +5 volts from the computer power supply unit (or from the system power supply where the controller is located) to the foot of the Vcc microcontroller. And that's all, you can upload the program.
The site where you can get the firmware UniProf

That's enough for a start. Then I recommend USBASP programmer working via USB. It is faster, less buggy on long wires and generally more serious :))))
')
Related Links:
Making the simplest programmer AVR
Making a USBASP programmer