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Old 28th August 2007, 09:22 AM   #1
Talking H-Bridge Circuit question.

HI All ,

i'm building H-Bridge circuit for my robot , and i got the schematic from a book i have ,

just i have one question about this circuit....i have two terminals for the signal ,so how i'll connect them .

will i connect the signal terminals to VCC and GND , or just 5 V ,

could you look at the file and tell me ?

and what does the word 'power supply is single ended' means?

will this circuit work with a DC motor of 12 Volt ?
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Old 28th August 2007, 11:18 AM   #2
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Quote:
Originally Posted by watzmann
HI All ,

i'm building H-Bridge circuit for my robot , and i got the schematic from a book i have ,

just i have one question about this circuit....i have two terminals for the signal ,so how i'll connect them .
Forward Control and Reverse Control are used to make the motor go forward or backwards. These are the signals that cause motor control.

Quote:
Originally Posted by watzmann
will i connect the signal terminals to VCC and GND , or just 5 V
The HBridge is powered by the +V and GND from you battery. The HBridge GND must be tied to the controller GND. The HBridge V+ can be hooked to VCC on the controller or it can be from a separate motor battery.
Quote:
Originally Posted by watzmann
and what does the word 'power supply is single ended' means?
It means the supply provides a V+ and a GND. A two ended supply would have V+, GND, and V-.
Quote:
Originally Posted by watzmann
will this circuit work with a DC motor of 12 Volt ?
That would be NO, unless your signal from the controller (Froward Control / Reverse Control) are also at 12 V when high. I am thinking that with this setup the HBridge V+ can not be greater then the controller VCC. One of the analog guys will speak up if this is wrong.
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Old 28th August 2007, 12:03 PM   #3
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do you have another h-bridge circuit that i can use to run my motor
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Old 28th August 2007, 12:24 PM   #4
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How much current does it use ?
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Old 28th August 2007, 01:05 PM   #5
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MAx.Current 5 A
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Old 28th August 2007, 01:11 PM   #6
Default This site will help you will

http://www.ikalogic.com/H_bridge_1.php
its my friend project he made it on calculations and its work will.
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Old 29th August 2007, 09:26 AM   #7
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i built my original one and it worked very well with the 12 volt motor ....thank you
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Old 29th August 2007, 03:28 PM   #8
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Quote:
Originally Posted by watzmann
i built my original one and it worked very well ....
With this circuit, your logic must make it impossible to put a high in both imputs at the same time. - If they are both high then all 4 transistors will be on, and there will be a lot of current, heat and smoke

Also, the power supply must be protected against short circuits - Add a fuse in the bridge's +V lead.
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