[SOLVED]L293D Control Two Micro Metal Gearmotor HP

[espruino-discuss3]

Posted at 2014-04-27 by jacklee

Hello,

I using a L293D chip(16 pin) to control two 298:1 Micro Metal Gearmotor.
the following attach files is my Circuit.

Any i refer the http://www.espruino.com/L293D and write my code like below
but when send to Espruino to LED is LightUp but the GearMotor still not work is it any step i missing?

digitalWrite(LED3,1); //Check the Board is Word for LED

var outputs = [C6,C7,C8,C9];
digitalWrite(outputs[0],1); // output 1
digitalWrite(outputs[1],1); // output 2
digitalWrite(outputs[2],1); // output 3
digitalWrite(outputs[3],1); // output 4

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Attachments:

• Circuit.jpg

[espruino-discuss3]

Posted at 2014-04-27 by jacklee

I have capture a images for detail

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Attachments:

• 20140427_185456.jpg

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Posted at 2014-04-27 by MrTimcakes

Forgive me if i am wrong, but it looks like you don't have your motors connected to a ground. You have them hooked up to an output that is powered.

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Posted at 2014-04-27 by jacklee

Hi, Ducky thank for reply.
you are right i miss connect GND and "Bat" to Breadboard.

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Posted at 2014-04-27 by jacklee

I have Change my Circuit to the Following.
and update my code to

digitalWrite(LED1,1); //Check the Board is Word for LED

var outputs = [C6,C7,C8,C9];

digitalWrite(outputs[0],1); // output 1
digitalWrite(outputs[1],0); // output 2
digitalWrite(outputs[2],1); // output 3
digitalWrite(outputs[3],0); // output 4

But the Gearmotor is still not working

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Attachments:

• 10312078_241440182711853_270007380_n.jpg

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Posted at 2014-04-27 by MrTimcakes

Oh, i dind't spot that you hadn't connected the power to the espruino. What happens if you attach one of the motor terminals to GND?

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Posted at 2014-04-27 by MrTimcakes

i found this, http://fritzing.org/projects/arduino-l293d its for arduino but it might help you.

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Posted at 2014-04-28 by @gfwilliams

@ducky The idea of the L293D is that the motor can have both sides connected to the controller - so you can run the motor in reverse.

@jacklee that circuit and code looks absolutely fine to me. Is the motor rated for 5v, or some higher voltage? Perhaps you could check with a meter and see if one side of the motor really is at 5v, and the other is at gnd?

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Posted at 2014-04-28 by jacklee

@ducky Thank You for you information and reply.
@gfwilliams I found my problem but still have one issue for me.

First: in bread board, power circuit(+,-)is separated at half point so i need to make the far right two wire near.

The unsolved issue is i can't solve when i using [C6,C7,C8,C9] or [C6,C7,C4,C5]
the motor is not work properly.
Example if i using [C6,C7,C8,C9] and code like below . the motor should be stop,
but one of the motor is still working

var outputs = [C6,C7,C4,C5]; 
digitalWrite(outputs[0],0); // output 1
digitalWrite(outputs[1],0); // output 2
digitalWrite(outputs[2],0); // output 3
digitalWrite(outputs[3],0); // output 4

I need to code like below to stop both of the motor

var outputs = [C6,C7,C4,C5]; 
digitalWrite(outputs[0],0); // output 1
digitalWrite(outputs[1],0); // output 2
digitalWrite(outputs[2],0); // output 3
digitalWrite(outputs[3],1); // output 4

I have testing few hours in [C6,C7,C8,C9] and [C6,C7,C4,C5] this two group.
but the result is same all not work properly for me.

After few hours I change my Circuit PIN to B3,B4,B5,B6
Like the Attach Images below

and code like below is work properly for me

Both motor is Run

var outputs = [B3,B4,B5,B6]; 
digitalWrite(outputs[0],0); // output 1 
digitalWrite(outputs[1],1); // output 2 
digitalWrite(outputs[2],0); // output 3 
digitalWrite(outputs[3],1); // output 4

Both motor is Stop

var outputs = [B3,B4,B5,B6]; 
digitalWrite(outputs[0],0); // output 1 
digitalWrite(outputs[1],0); // output 2 
digitalWrite(outputs[2],0); // output 3 
digitalWrite(outputs[3],0; // output 4

I have No Idea why the PIN in the "C" is not working properly but the PIN in "B" is working Good?

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Attachments:

• final.jpg

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Posted at 2014-04-28 by @gfwilliams

I'm afraid I have no idea! I just tested here and C4/5/6/7 outputs output the correct values with digitalWrite.

Maybe there is some kind of short on your board, but we test for that in manufacturing. Can you check the outputs with an LED (L293D doesn't have to be connected) and see if they output the correct values?

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Posted at 2014-05-01 by jacklee

@gfwilliams Hi, I Found what is the issue .

is my fault when i solder the pin header to Espruino not correct. their still have some gap.

I have use a LED test by

digitalWrite

All PIN is working Fine Now

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Posted at 2014-05-01 by @gfwilliams

Great, thanks for letting me know!

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Posted at 2014-06-18 by gnz

Thanks @jacklee for this thread and for your diagrams! It helped me get the L293D working! You should consider turning it into a tutorial on the espruino page, because there is no other explanation about using the L293D on a breadboard (instead of soldering it to the espruino).

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Posted at 2014-06-19 by Pumych

Hi @jacklee, can I ask what is this software that you using to draw the circuits?

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Posted at 2014-06-19 by @gfwilliams

@Pumych it's probably Fritzing

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Posted at 2014-06-19 by Pumych

I must to say that I inspired by Espruino (because of JavaScript) to learn new interesting things. Thank you.

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Posted at 2014-06-19 by jacklee

@GNZ I happy my Post is helping you, Good Idea Yes i should turning it into a tutorial.

@Pumych Yes, i using Fritzing and Illustrator for the circuits.

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Posted at 2018-05-21 by user90026

:/ Sorry to be posting this out of nowhere, but could you please share the fritzing part for the micrometal motors? I can't seem to find them anywhere. TIA