I'm new at this but I can build simple circuits and other stuff, but I can not seem to find anyone to help me figure this out. I have 2 circuit designs for the SN754410 H-bridge driver. Both uses a SN74HC00 chip as well. One has 2 wires going into the the A and B side of the SN74HCoo and one only uses 1 wire to both A and B. I am using the Mechatronics demo board with the pic 16f690 chip. Now I am using the demo project #9 for the program. I have built the motor driver from the freeduino schematics that is in green. The 4 wires comming from the 16f690 are 2 positives and 2 negative wires about 5V. and when you hit the switch 2 it changes the polarities on all 4 wires. HOW DO I HOOK IT UP TO ONE OF THESE SCHEMATICS!!! Which one is the right one?? PLEASE SOMEONE HELP. I assume that once I can get this to work then all I would have to do is change the program alittle to change the direction of the motor with a senor or bump switch.