Asked — Edited

H Bridge Question:

I finally had a chance to get back to my robots. I wired up the Motor driver ( per the very through tutorial) and hooked it up to the EZ-B as follows: AIN1 to D15 AIN2 to D16 BIN1 to D17 BIN2 to D18

Left Trigger A assigned to D17 Left Trigger B assigned to D18 Right Trigger B assigned to D16 Right Trigger A assigned to D15

VM connected to seperate battery pack (7.2 volts) positive

Connected the EZ-B Opened an H-Bridge movement panel..................then clicked on all 4 directions and...............................Nothing happened !!!!!! Where did I go wrong???????? What am I missing? Thanks all


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PRO
Synthiam
#1  

Great work. you've connected 4 of the wires as a start. What about the others?

Did you connect the pwm and other wires? Look at the tutorial page, there are many pictures and explanations.

#2  

YES! All the other wires are also connected as per your great wiring tutorial for the H-Bridge hook up. I'm sure I must be missing something obvious. I triple checked myself and went through the wiring for the H-Bridge very carefully. I don't have the Neg (gnd) from the seperate battery pack connected to the EZ-B. Would that result in a no go?

PRO
Synthiam
#3  

what do you mean seperate battery pack?

post a pic of what you have

#4  

I thought I resolved my problem. I was attemping to connect VM to an entirely seperate battery pack. I think I misconstrued the "connect VM directly to the positive of the battery pack". So, I connected VM to the positive of the battery pack that powers the EZ-B. I then connected to the EZ-B again and tried the movement panel. Still nothing! The "other battery pack" was a 7.2 volt; so I don't think it harmed the H-Bridge.The motors should operate from the Movement Panel just by clicking on the directional tabs, right? They did turn green, but no motor movement! Any ideas?

PRO
Synthiam
#5  

Picture please. Even a diagram anything at all will help

#6  

Do you have one battery powering the EZ-B and a separate battery powering the H-Bridge? If so, I believe the solution is to connect the two negative wires together.

#7  

A seperate battery pack was my first mistake. I misunderstood. VM is now directly connected to the positive side of the battery pack that is powering the EZ-B. However; I still have no motor power. I will try to get you a pic tomorrow DJ.

PRO
Synthiam
#8  

Please a pic or a drawing.

Your GND's will need to be connected:)