I have performed all tutorials on the arm(STM32F3) controller and they are successful,
now I want to perform it on a different controller,
I have set there is shunt resistor connected in STM32F3 target board, Also got notduino has shunt resistor.
my question is, how to choose shunt resistor,
as I see in both (STM32F3 and noduino), there is two resistor connected,
STM32F3: 1R is connected to VDDA and 1R+12R is connected to VDD
Noduino : 51R is connected to AVCC,AREF and 51R+51R is connected to VCC,
Can you tell me logic behind these resistor?
for example what will be resistor if i want to attack attiny85?