Motor Shield volts problem?

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emerson
 
Posts: 2
Joined: Fri Jul 29, 2011 2:50 am

Motor Shield volts problem?

Post by emerson »

Hi,

First, sorry by my english.

I have a Motor Shield v 1.0. and i have a problem to make it work. The problem is that the motor don't move.
I'm using a external suply for the shield (9v) and a diferent suply for Arduino (Uno), and conect a DC motor (3,5v) on the shield.
The sketch i'm using to test is simple, like this:

Code: Select all

void loop() {
  motor.run(FORWARD);
  for (i=10; i<255; i++) {
    motor.setSpeed(i);  
    delay(1000);
   }
}
I use a multimeter to measure the voltage on the terminal block, = 0v (zero). But when i put a terminal of the multimeter in the block M4 and other in the GND of the same block, the voltage is between 0 and 0.50v (a scale for the code above).
The input is ok (9v), and the led is aligth.
I verify the solder and the polarity of the components like the tutorial, and locks ok.

I try two diferent motors (1 and 4) and the result was the same.

what can be wrong?

Thanks.

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adafruit_support_bill
 
Posts: 88096
Joined: Sat Feb 07, 2009 10:11 am

Re: Motor Shield volts problem?

Post by adafruit_support_bill »

Can you post some photos of your board? Also the whole code you are using.

That loop will take over 4 minutes to ramp up to full throttle. That motor probably won't start moving until you get up to nearly 50% (about 2 minutes).

emerson
 
Posts: 2
Joined: Fri Jul 29, 2011 2:50 am

Re: Motor Shield volts problem?

Post by emerson »

Thanks for reply.

I found the problem.
I study the schem for L293D and test the vcc expected for it and found that haven't enough energy in some pin. So i make again solder of input vcc that comes from Arduino.
Now it's ok.

Thanks!

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