because i have to develop both circuits,first with the amplfier and later with the transistor. it isn´t my choice,it is about my teacher jeje
and about the transistor i did with a BD135(which can have 1.5A in its colector) but i saw the next thing:
i need at least to supply the 555 with 5V,so if i use this supply voltage and duty cycle 60% i should see 3V across my motor,yes?
but when the duty cycle is 60% and supply 3V, the motor consumes its maximum current 0.3A, but i think that it should happen with 5V of supply because 0.6*5=3V??