can't drive my DC motor - Electronic Circuits Projects Diagrams Free

bar_shay · 27th October 2007, 10:56 AM

Hello all,

this is my first time in this forum and my english is not so well, so i hope for understanding.
I have a DC motor from some drill that work on 18V. I want to driving this motor with atmel 89c5131, I use L293D but it get warm up too much and the motor doesn't work, I think that the reason is too much current to push.
I need help with this, what i need to do for the motor will work.

**Nigel Goodwin** · 27th October 2007, 10:58 AM

You need a MUCH more powerful driver device - an L293 is only for tiny motors. Do you want to mdrive it both ways?, if you do you will require an H-Bridge.

bar_shay · 27th October 2007, 11:03 AM

Yes, I want to drive itboth ways.
I need a cheap solution because i dont have enough budget

**Nigel Goodwin** · 27th October 2007, 11:45 AM

Have a look at http://www.bobblick.com/techref/proj...e/hbridge.html for some ideas.

bar_shay · 27th October 2007, 12:41 PM

thanks, I think that it will help

**Krumlink** · 27th October 2007, 04:13 PM

At my HS robotic club, we use VECTORS, which can drive 65 Amp Motors

They cost $100

**Nigel Goodwin** · 27th October 2007, 08:22 PM

Quote:

Originally Posted by Krumlink

At my HS robotic club, we use VECTORS, which can drive 65 Amp Motors

They cost $100

Did you not read

Quote:

I need a cheap solution because i dont have enough budget

**Krumlink** · 27th October 2007, 08:22 PM

I know I saw that, I reccomend that boblick site, or just use a H bridge using some High Amp Transistors/mosfets.

Wingmax · 28th October 2007, 10:06 PM

Quote:

Originally Posted by bar_shay

Hello all,

this is my first time in this forum and my english is not so well, so i hope for understanding.
I have a DC motor from some drill that work on 18V. I want to driving this motor with atmel 89c5131, I use L293D but it get warm up too much and the motor doesn't work, I think that the reason is too much current to push.
I need help with this, what i need to do for the motor will work.

May be you should work out the current drawn by the motor first, then you'll be more certain about what driver is suitable for the job. Have you check
L298? It's a high voltage and current device with 2 H-bridge. Read the specs, I think it can take up to 2A.

**Nigel Goodwin** · 28th October 2007, 10:34 PM

Quote:

Originally Posted by Wingmax

May be you should work out the current drawn by the motor first, then you'll be more certain about what driver is suitable for the job. Have you check
L298? It's a high voltage and current device with 2 H-bridge. Read the specs, I think it can take up to 2A.

He's already said it's from an electric drill - it will need a LOT more than 2A.

Wingmax · 28th October 2007, 11:28 PM

I don't know the requirement of his project, but if he hasn't got much to spend, may be he should use a smaller motor. If a smaller motor can do the job, then the motor itself is cheap and the driver components are also cheaper. If he has to use that motor, than may be there's no cheap solution.

27th October 2007, 10:56 AM	(permalink)
bar_shay New Member	can't drive my DC motor Hello all, this is my first time in this forum and my english is not so well, so i hope for understanding. I have a DC motor from some drill that work on 18V. I want to driving this motor with atmel 89c5131, I use L293D but it get warm up too much and the motor doesn't work, I think that the reason is too much current to push. I need help with this, what i need to do for the motor will work.

27th October 2007, 10:58 AM	(permalink)
Nigel Goodwin Super Moderator	You need a MUCH more powerful driver device - an L293 is only for tiny motors. Do you want to mdrive it both ways?, if you do you will require an H-Bridge. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

27th October 2007, 11:45 AM	(permalink)
Nigel Goodwin Super Moderator	Have a look at http://www.bobblick.com/techref/proj...e/hbridge.html for some ideas. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

27th October 2007, 04:13 PM	(permalink)
Krumlink Moderator Blog Entries: 1	At my HS robotic club, we use VECTORS, which can drive 65 Amp Motors They cost $100 __________________ MechTronics

27th October 2007, 08:22 PM	(permalink)
Krumlink Moderator Blog Entries: 1	I know I saw that, I reccomend that boblick site, or just use a H bridge using some High Amp Transistors/mosfets. __________________ MechTronics

27th October 2007, 11:03 AM	(permalink)
bar_shay New Member	Yes, I want to drive itboth ways. I need a cheap solution because i dont have enough budget

27th October 2007, 12:41 PM	(permalink)
bar_shay New Member	thanks, I think that it will help

28th October 2007, 11:28 PM	(permalink)
Wingmax Experienced Member	I don't know the requirement of his project, but if he hasn't got much to spend, may be he should use a smaller motor. If a smaller motor can do the job, then the motor itself is cheap and the driver components are also cheaper. If he has to use that motor, than may be there's no cheap solution. __________________ May the force be with you. My project: Simple White Line Follower http://au.youtube.com/watch?v=8Z_MmrdH4oc http://i271.photobucket.com/albums/j...nefollower.jpg

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