No dc ouput on motor shield terminals

Adafruit Ethernet, Motor, Proto, Wave, Datalogger, GPS Shields - etc!

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
Locked
User avatar
chrisgrant72
 
Posts: 6
Joined: Mon Jan 24, 2022 2:11 am

No dc ouput on motor shield terminals

Post by chrisgrant72 »

Please help,
Im 100% sure everthing is wired correctly see photos , arduino is receiving code and blink test is working ( BTW im a newby at this) Fan are not faulty polarity is correct. The adafruit is a V2 and Arduino uno R3 . IDE LIBRARY: MOTOR SHIELD V2 is installed on adafruit. Only issue I can see is a message displayed at bottom right corner after sketch is loaded saying "could not connect to serial port Error. Timeout after 1000ms.
DC motor test does not work no Voltage on motor terminals at all. been going at this for 3 days now and no luck, Pleeeasse help for my sanity!!
Attachments
IMG_0074.jpg
IMG_0074.jpg (166.01 KiB) Viewed 305 times
IMG_0072.jpg
IMG_0072.jpg (161.87 KiB) Viewed 305 times
IMG_0071.jpg
IMG_0071.jpg (140.09 KiB) Viewed 305 times

User avatar
adafruit_support_bill
 
Posts: 88089
Joined: Sat Feb 07, 2009 10:11 am

Re: No dc ouput on motor shield terminals

Post by adafruit_support_bill »

Please post the complete code you are using. Also please tell us what kind of Arduino you are using.

User avatar
chrisgrant72
 
Posts: 6
Joined: Mon Jan 24, 2022 2:11 am

Re: No dc ouput on motor shield terminals

Post by chrisgrant72 »

Arduino UNO R3 and the example DC motor test in the IDE . If I remember right ( it’s late and I’m in bed) tools>examples>adafruit>dc motor test .
Thank you.

Ultimately I’m going to use it in Simhub as a wind simulator

User avatar
adafruit_support_bill
 
Posts: 88089
Joined: Sat Feb 07, 2009 10:11 am

Re: No dc ouput on motor shield terminals

Post by adafruit_support_bill »

OK. The power indicator LED is on and the wiring looks correct for that sketch.

What motor are you using?

Also, try running the i2c scanner code here and post the results: https://playground.arduino.cc/Main/I2cScanner/

User avatar
chrisgrant72
 
Posts: 6
Joined: Mon Jan 24, 2022 2:11 am

Re: No dc ouput on motor shield terminals

Post by chrisgrant72 »

The result was:
Not connected. Select a board and a port to connect automatically.
SCANNING....
No I2C device found

User avatar
adafruit_support_bill
 
Posts: 88089
Joined: Sat Feb 07, 2009 10:11 am

Re: No dc ouput on motor shield terminals

Post by adafruit_support_bill »

What motor are you using?

User avatar
chrisgrant72
 
Posts: 6
Joined: Mon Jan 24, 2022 2:11 am

Re: No dc ouput on motor shield terminals

Post by chrisgrant72 »

12v dc 1.4amp fan

User avatar
adafruit_support_bill
 
Posts: 88089
Joined: Sat Feb 07, 2009 10:11 am

Re: No dc ouput on motor shield terminals

Post by adafruit_support_bill »

The drivers on the shield are only rated for 1.2A.

User avatar
chrisgrant72
 
Posts: 6
Joined: Mon Jan 24, 2022 2:11 am

Re: No dc ouput on motor shield terminals

Post by chrisgrant72 »

But there would still be a voltage across the terminals in test mode wouldn’t there?
My multimeter is not picking up any voltage at all on all 4 motor terminals with or without a motor connected

User avatar
adafruit_support_bill
 
Posts: 88089
Joined: Sat Feb 07, 2009 10:11 am

Re: No dc ouput on motor shield terminals

Post by adafruit_support_bill »

The "No I2C device found" indicated a problem communicating with the shield. If you contact [email protected] with a link to this thread we can replace that for you.

But there would still be a voltage across the terminals in test mode wouldn’t there?
Not if the drivers were fried by an overload. Running that fan at 12V risks burning out the drivers. You could probably safely run it at 9 or 10V.
Another alternative is to use a driver with higher current capacity: https://www.adafruit.com/product/3190

User avatar
chrisgrant72
 
Posts: 6
Joined: Mon Jan 24, 2022 2:11 am

Re: No dc ouput on motor shield terminals

Post by chrisgrant72 »

Ok I’ll buy another board and test it without a load on the output motor terminals to check for a voltage with the program I intend to run on it

User avatar
adafruit_support_bill
 
Posts: 88089
Joined: Sat Feb 07, 2009 10:11 am

Re: No dc ouput on motor shield terminals

Post by adafruit_support_bill »

No need to buy a new one. Overload is not the immediate cause of the problem. As I said in my previous post, since there is no i2c communication, we can replace it:
The "No I2C device found" indicated a problem communicating with the shield. If you contact [email protected] with a link to this thread we can replace that for you.
Just don't try running that fan at 12v using the shield.

Locked
Please be positive and constructive with your questions and comments.

Return to “Arduino Shields from Adafruit”