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Author Topic: L298 Motor Driver  (Read 17845 times)

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Offline reSpawnTopic starter

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L298 Motor Driver
« on: January 15, 2009, 01:35:25 PM »
Hello,
I'm building an L298 Motor driver pcb, and I need your suggestions.
Here is the schematic I've come up after doing some reasearch using google and L298's datasheet.

What do you guys think? Will it work? What changes I should make?
I want to drive only one DC motor, that's why I've put the outputs in parallel.

Offline Canabots

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Re: L298 Motor Driver
« Reply #1 on: January 15, 2009, 04:50:49 PM »
Try comparing your schematic to the one used by the Solarbotics Compact motor driver. They both use the same chip.

http://www.solarbotics.com/assets/schematics/solarbotics_-l298_schematic.pdf

I don't know if the pinouts are different from that IC package to the one your using, but I hope this helps   ;D

This schematic is also for a DUAL motor driver, so just imagine that the outputs are in parallel like on your circuit.

Canabots  :)
« Last Edit: January 15, 2009, 04:52:19 PM by Canabots »
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Offline paulstreats

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Re: L298 Motor Driver
« Reply #2 on: January 16, 2009, 09:31:03 AM »
If i remember there should be a circuit example in the datasheet for the l298

Just follow that

Offline reSpawnTopic starter

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Re: L298 Motor Driver
« Reply #3 on: January 16, 2009, 02:09:49 PM »
Yes, but I wanted someone to look over my schematic and tell me if I did something wrong or not.
Can you please check it out?

Offline paulstreats

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Re: L298 Motor Driver
« Reply #4 on: January 16, 2009, 02:18:19 PM »
the circuit looks fine. The only thing that i would suggest is to use a potentiometer in conjunction with a good transistors on the sense pins. You will be able to "tune" the outputs like this.

quite often you might notice 1 motor moves faster than the other for no reason (slight manufacturing differences and tolerances)If you have a seperate pot and transistor for each sense pin then you can slow the faster one down a little.

Offline reSpawnTopic starter

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Re: L298 Motor Driver
« Reply #5 on: January 16, 2009, 02:23:19 PM »
as you can see, I only have one output. Anyway, tunnings can be made in software :P

Offline Webbot

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Re: L298 Motor Driver
« Reply #6 on: January 17, 2009, 07:14:27 PM »
Check out my tutorial http://www.societyofrobots.com/member_tutorials/node/159 The larger DC motor controller board uses a L298
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