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Topic: Servo problems - makes arduino connect and disconnect over and over (Read 1 time) previous topic - next topic

mrronoah

So I have tried 2 different types of servo and 5 in total and they all do the same thing. I am trying the servo sweep example and it just makes the arduino connect and disconnected every second. The wires are orange to 9, red to + brown to -. and i have tried other combos as well. I have tried different pwm pins and analog pins but it isnt working!!! I think theres something wrong with the arduino.
I have tried different computers, different servos, different wire, different combos of wires, the only thing i havent changed is the arduino. But it (the arduino) works fine with led's and buttons. WTF IS HAPPENING???

cr0sh

Have you tried using an external supply for the servo? It could be that the servo is drawing too much current, causing a sag and resetting the Arduino. You don't indicate what servo you have (ie, model, manufacturer, etc) nor do you say what "+" and "-" mean, so all I can go on is that you are trying to power the servo from the Arduino itself.

...and yes, while the tutorial shows this, that will only work properly with -some- low-current servos, and not while they are under load; you should always power servos from their own power supply, not from the Arduino's 5 volt regulator.
I will not respond to Arduino help PM's from random forum users; if you have such a question, start a new topic thread.

zoomkat

Google forum search: Use Google Advanced Search and use Http://forum.arduino.cc/index in the "site or domain:" box.

mrronoah

I have tried a 6v external which should definitely be sufficient but it still isnt working. With the external battery it does nothing, no buzzing, no sound nothing at all. I'm sure i am doing it right and I double and triple checked using the diagram zoomkat provided.
I have 2 different types of servos but preferably i would like to use the corona.
Corona CS-929MG
TowerPro SG90

JimboZA

Quote
I'm sure i am doing it right and I double and triple checked using the diagram zoomkat provided.

Best post a pic of what you have then.... photo of hand drawn sketch would be ok
My hovercraft is full of eels.

No PMs for help please.
DO NOT power servos from Arduino 5V: give them their own power and connect the grounds.

mrronoah

Found the problem. Pretty ashamed to say that the battery was dead. switched it out just now and its working fine
:smiley-red:

JimboZA

Quote
the only thing i havent changed is the arduino.


Oh, and the battery...  ]:D
My hovercraft is full of eels.

No PMs for help please.
DO NOT power servos from Arduino 5V: give them their own power and connect the grounds.



Hello ppl...
had the same problem as mrronoah..but that "external supply to servo" solution worked and now it is working fine...
but i have a doubt...
that pin 13 internal led glows when i am using the servo sweep code even though its not defined in d code...
why is that happening? is that ok?
or is my arduino not working properly?

JimboZA


that pin 13 internal led glows when i am using the servo sweep code even though its not defined in d code...
why is that happening? is that ok?
or is my arduino not working properly?


Seems that's nothing to worry about: there's been a lot of discussion about that here, and iirc the led on 13 being on all the time seems to have snuck in on a certain version. I'm hazy on the details. Mine is on by default, and it annoys the crap out of me, so I just throw a digitalWrite in at the top of each sketch to turn it off.
My hovercraft is full of eels.

No PMs for help please.
DO NOT power servos from Arduino 5V: give them their own power and connect the grounds.


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