Hello everyone! I have a problem with this circuit. The problem is that motor speed is not consistant, and it is same thing if motor spins faster or slower depending on the potentiometer. It seems like the ne555 is not outputing consistant signal to the gate of the mosfet for some reason. It is especialy noticable at lower speeds. Im using HRF3205 instead of BUZZ11 in this circuit, and I am also using 2 diodes in parallel instad of one here because I didnt have MBR 1656. I'm using 2 diodes schotky in one TO-220 package from a pc PSU. Here is the circuit.
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