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In the $50 robot tutorial on the site it where it gives you the parts list, under the Optional Parts list it says "AVR STK Serial Port Dongle Programmer" and "AVR ISP2 Programmer". Are these BOTH required or is it one or the other?
Also, does the tutorial require all 3 battery types: "Enclosed 4 AA Battery Holder (with On/Off switch)", "9V Battery", and the "6v 2000mah NiMH Battery"? Or are those just 3 options for 1 thing?
and for the batteries, if I just buy the 6v battery pack, will I have to modify the circuit or anything or is its design simply ready for whichever one you choose?