L293D H-Bridge: Is it effective to run a small DC motor in a model - Electronic Circuits Projects Diagrams Free

rancid rock · 29th June 2006, 09:31 AM

hey,

I was wondering if the L293D H-Bridge is effective in running a small DC motor for a model representation of a door.

If not, have you found a another H-Bridge that could do this job effectively and simply.

because apparently the L293D is capable of running a stepper motor !

thanks,

rancid rock · 29th June 2006, 11:34 AM

no one knows about H-Bridges?........

ZIGGY_DAN · 29th June 2006, 11:43 AM

I don't know much about h-bridges but there are many posts on this forum about h-bridges and from what i can gather the h-bridge can run a dc motor forwards and backwards and i can see no reason why it should not work for your task. The L293D is very commonly used for driving stepper motors and dc motors.

i suppose it depends upon the specifications of your motor,

DC operating voltage?
current draw?

i'm no expert on h-bridges.

hope this helps

don't forget a reverse biased diode across the windings to prevent counter electro motive force.

JRoque · 29th June 2006, 09:15 PM

Hello, I've used the TPIC0108B with good success.

JR

rancid rock · 30th June 2006, 07:48 AM

ok thanks JR i'll chek that out

nsafadi · 3rd July 2006, 04:06 PM

try L298 .. it's out 4A and can frive 2 dc motors ..

bye

philba · 3rd July 2006, 05:53 PM

rancid, you need to tell us what current your motor will pull. if it's a small motor, I'd bet the current level will be fairly small and thus the L293D will work just fine. You will only need 1/2 of it, by the way.

Russlk · 3rd July 2006, 09:08 PM

I built a servo to drive a small antenna using LM324 op amp, so power is not necessarily needed.

**Nigel Goodwin** · 3rd July 2006, 09:11 PM

Quote:

Originally Posted by Russlk

I built a servo to drive a small antenna using LM324 op amp, so power is not necessarily needed.

It's got to have been an absolutely tiny motor?, an LM324 can provide hardly any current at all? - I'm doubtful there's a motor that low power? (that could move anything worthwhile).

Russlk · 3rd July 2006, 10:15 PM

Quote:

Originally Posted by Nigel Goodwin

It's got to have been an absolutely tiny motor?, an LM324 can provide hardly any current at all? - I'm doubtful there's a motor that low power? (that could move anything worthwhile).

I built it and it worked. The motor was about 3cm in diameter, don't remember the voltage, probably 6 volts because it was powered by batteries. The dish antenna was to float on the water, the servo kept it ponted at the satellite.

rancid rock · 6th July 2006, 08:09 AM

well my motor is also very small (hence the model representation).

rancid rock · 6th July 2006, 08:11 AM

i preferably wanted the most simple H-Bridge possible thanks, it only needs to move a very small and light piece of wood that will be on wheels or a rack.

ZIGGY_DAN · 6th July 2006, 08:17 AM

Does the motor need to go both ways??

If so then just use the L293D.

If not a couple of transistors will do it.

rancid rock · 6th July 2006, 08:19 AM

yes well when u open a door, u would like it to close....

so yeh both ways is essential

thanks for the quik replies and the L293D is too much power, it can control a stepper motor

Russlk · 6th July 2006, 08:03 PM

What are you using for a controller? a PIC micro can output 20 mA which is enuf to drive a small toy motor.

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29th June 2006, 09:31 AM	(permalink)
rancid rock	L293D H-Bridge: Is it effective to run a small DC motor in a model hey, I was wondering if the L293D H-Bridge is effective in running a small DC motor for a model representation of a door. If not, have you found a another H-Bridge that could do this job effectively and simply. because apparently the L293D is capable of running a stepper motor ! thanks, __________________ <( \"<)....kirby!!!....0==[=====>

29th June 2006, 11:34 AM	(permalink)
rancid rock	no one knows about H-Bridges?........ __________________ <( \"<)....kirby!!!....0==[=====>

29th June 2006, 11:43 AM	(permalink)
ZIGGY_DAN	I don't know much about h-bridges but there are many posts on this forum about h-bridges and from what i can gather the h-bridge can run a dc motor forwards and backwards and i can see no reason why it should not work for your task. The L293D is very commonly used for driving stepper motors and dc motors. i suppose it depends upon the specifications of your motor, DC operating voltage? current draw? i'm no expert on h-bridges. hope this helps don't forget a reverse biased diode across the windings to prevent counter electro motive force.

29th June 2006, 09:15 PM	(permalink)
JRoque	Hello, I've used the TPIC0108B with good success. JR

30th June 2006, 07:48 AM	(permalink)
rancid rock	ok thanks JR i'll chek that out __________________ <( \"<)....kirby!!!....0==[=====>

3rd July 2006, 04:06 PM	(permalink)
nsafadi	try L298 .. it's out 4A and can frive 2 dc motors .. bye

3rd July 2006, 05:53 PM	(permalink)
philba	rancid, you need to tell us what current your motor will pull. if it's a small motor, I'd bet the current level will be fairly small and thus the L293D will work just fine. You will only need 1/2 of it, by the way.

3rd July 2006, 09:08 PM	(permalink)
Russlk	I built a servo to drive a small antenna using LM324 op amp, so power is not necessarily needed. __________________ see my website: www.geocities.com/russlk

6th July 2006, 08:09 AM	(permalink)
rancid rock	well my motor is also very small (hence the model representation). __________________ <( \"<)....kirby!!!....0==[=====>

6th July 2006, 08:11 AM	(permalink)
rancid rock	i preferably wanted the most simple H-Bridge possible thanks, it only needs to move a very small and light piece of wood that will be on wheels or a rack. __________________ <( \"<)....kirby!!!....0==[=====>

6th July 2006, 08:17 AM	(permalink)
ZIGGY_DAN	Does the motor need to go both ways?? If so then just use the L293D. If not a couple of transistors will do it.

6th July 2006, 08:19 AM	(permalink)
rancid rock	yes well when u open a door, u would like it to close.... so yeh both ways is essential thanks for the quik replies and the L293D is too much power, it can control a stepper motor __________________ <( \"<)....kirby!!!....0==[=====>

6th July 2006, 08:03 PM	(permalink)
Russlk	What are you using for a controller? a PIC micro can output 20 mA which is enuf to drive a small toy motor. __________________ see my website: www.geocities.com/russlk