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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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Synthiam
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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:)
#9  
I resolved the problem. I left it alone over nite and went back to it this morning. I'm reticent to devulge the simplicity of the problem. I had the servo plugs turned around backwards! Now the motors work just fine. (hangin' my head in embarassment). Looks like I should develop the habit of waiting 48 hours before posting a question to the forum.
PRO
Synthiam
#10  
Haha, yes. You seem to solve your own problems - after a tiny explosion - I don't think you've actually needed help ever. You just needed communication with people:) Then, after a bit of time you always solve the problem.

Pretty awesome to see you grow dude. You keep learning more daily. Feel like a kid yet?:D
#11  
I have learned to relax and I am having a great time! I am enjoying this new found hobby more then anything I've been into in years!!It is just great fun, I feel like I am going to achieve all my robotic goals, Thanks to you and what you have given to the robotics community.
PRO
Synthiam
#12  
@lostcreekstation - I'm glad to have helped:)
#13  
It looks like I'm having the same exact problem with my omnibot, the only difference is that I don't think it's just my servo wires flipped the wrong way.

Do you think you might want to help me now that you're a pro at this?