53_Motor Board Components Mounted / Verified
After having the board etched, I placed solder paste onto the chip pads and was able to get all the parts soldered onto the board (Figures 1-5).
Figure 1: Putting Solder Paste onto Surface-Mount Pads
Figure 2: Placing and Soldering Parts onto PCB (AND Gates)
Figure 3: Placing and Soldering Parts onto PCB (Inverter Gates)
Figure 4: Placing and Soldering Parts onto PCB (Motor Driver)
Figure 5: Motor Driver IC Soldered onto PCB
After getting all the parts placed, I plugged the PIC33 into the input headers and a motor into one of the motor output terminals (Figure 6). At first, directional control wasn’t working, but I switched the motor over to the 2nd motor terminal resulting in the directional control working. After looking at the traces again, I think the motor driver’s traces for the first motor output were too thin and were damaged, hindering direction control. Some of the traces were thinned out due to a problem in etching where the milling had to be done twice. After switching to the second port though, motor speed and direction were able to be controlled with the same PWM signal previously used to light the LED indicator for the ADC conversions along with an ON/OFF signal.
