Originally Posted by NC Cams  If the device is to be battery powered and the stepper on the same power buss as the power supply, use a LM2940 regulator IC instead of the 7805 - MUCH better performance with servo voltage induced spikes with the 2940 than 7805. Also "free" over voltage and reverse polarity protection. |
Hi NC cams..well actually i'm going to power it by a cell phone power supply or 110 plug wire
so at the end should look like this
