Hi,
I have stacked the Adafruit motor shield on the Arduino Uno.
When powering the motor shield (12V) the Arduino seems not to be powered.
Removing the VPIN jumper gives no effect.
What did I wrong?
Motorshield and no Arduino power?
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- adafruit_support_bill
- Posts: 88154
- Joined: Sat Feb 07, 2009 10:11 am
Re: Motorshield and no Arduino power?
With the VIN jumper removed, there is no power connection between the Arduino and the shield.
Please post photos showing the front and back of the shield and all your wiring.
Please post photos showing the front and back of the shield and all your wiring.
- Mike1313
- Posts: 29
- Joined: Sat Nov 15, 2014 10:32 am
Re: Motorshield and no Arduino power?
Hi, thank you for your replay.
I had a shortcut of both Arduino and motor shield by stacking the boards with 12 V, that was the cause, very stupid...
I solved it with a new Arduino and (for the time being ) an original Arduino motor shield. (I ordered a new AF motor shield)
However it was not clear to me what the function of the VIN jumper is.
Thanks for your tip.
Will it be save to program the Arduino with the USB cable, while motor shield connected to 12V?
I had a shortcut of both Arduino and motor shield by stacking the boards with 12 V, that was the cause, very stupid...
I solved it with a new Arduino and (for the time being ) an original Arduino motor shield. (I ordered a new AF motor shield)
However it was not clear to me what the function of the VIN jumper is.
Thanks for your tip.
Will it be save to program the Arduino with the USB cable, while motor shield connected to 12V?
- adafruit_support_bill
- Posts: 88154
- Joined: Sat Feb 07, 2009 10:11 am
Re: Motorshield and no Arduino power?
In both old and new versions of the shield, the VIN jumper connects the H-Bridge motor power to the VIN pin of your Arduino. VIN is directly connected to the DC input jack on the Arduino. This allows you to power your motors from the raw DC input of your Arduino.it was not clear to me what the function of the VIN jumper is.
Since motors are both power hungry and sources of electrical interference, for most applications, we recommend removing the VIN jumper and using a separate power supply for your motors. Removing the VIN jumper isolates your Arduino from the motor power.
- Mike1313
- Posts: 29
- Joined: Sat Nov 15, 2014 10:32 am
Re: Motorshield and no Arduino power?
My robot needs 12V (Lipo) for both DC motors (see picture).
So I need a separate 5V battery to sweep the servo with the ultrasonic sensor and remove the jumper?
Or connect the servo to the servo pins on the motor shield?
Can I use both DC motors and the servo on the motor shield, what would you advise?
- Mike1313
- Posts: 29
- Joined: Sat Nov 15, 2014 10:32 am
Re: Motorshield and no Arduino power?
As you can see on the picture I am using the Arduino Motorshield.( for the time being)
There is remote control with Xbee (works great)
Regards,
Michiel
There is remote control with Xbee (works great)
Regards,
Michiel
- adafruit_support_bill
- Posts: 88154
- Joined: Sat Feb 07, 2009 10:11 am
Re: Motorshield and no Arduino power?
Nice looking robot!
Servo power on the motor shield is separate from the other motor power. By default, they get power from the Arduino 5v pin. It is also possible to use an external supply via an optional set of screw terminals.
The Arduino 5v voltage regulator is not very efficient, and if it is getting primary power from a 12v source, it will be working pretty hard. Adding a servo to that could cause it to overheat.
A more efficient way to supply 5v power to the servos would be with one of these: https://www.adafruit.com/product/1385
Servo power on the motor shield is separate from the other motor power. By default, they get power from the Arduino 5v pin. It is also possible to use an external supply via an optional set of screw terminals.
The Arduino 5v voltage regulator is not very efficient, and if it is getting primary power from a 12v source, it will be working pretty hard. Adding a servo to that could cause it to overheat.
A more efficient way to supply 5v power to the servos would be with one of these: https://www.adafruit.com/product/1385
- Mike1313
- Posts: 29
- Joined: Sat Nov 15, 2014 10:32 am
Re: Motorshield and no Arduino power?
Good idea!
I'll try to get this converter, it may be the solution.
Thank you for your help,
Regards,
Michiel Bleeker
Hilversum
Netherlands
I'll try to get this converter, it may be the solution.
Thank you for your help,
Regards,
Michiel Bleeker
Hilversum
Netherlands
Please be positive and constructive with your questions and comments.