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Author Topic: Jerky servo!!!  (Read 2254 times)
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I don't think you connected the grounds, Dave.
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To the servo - where else?
Don't forget to common the grounds.
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When i give commands to the servo and/or the LED it works fine, but when I give commands to the motors it jitters and jerks, and the motors also go on only for half of a second or 1 and a half of a second sometimes when they are supposed to go on for 1 second.

How do I stop this happening

When I remove the servo then everything works fine but when I add the servo the above problem occurs...

Please help...
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I don't think you connected the grounds, Dave.
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9V batteries are rubbish for powering high current devices like motors and servos.
Don't power anything other than LEDs off the Arduino.
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But if I add 4 AA batteries then the robot will become too heavy and will not be able to move...So is there no other alternative.
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maybe you should redesign your robot then? you could look for a flat lithium battery pack, it would be lighter and smaller, but you would need extra circuitry to charge it and prevent it from being discharged too much.
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But if I add 4 AA batteries then the robot will become too heavy and will not be able to move...So is there no other alternative.

Looks like you have designed a robot that will not work. You really need to use google and other resources to look at how robots like the one you want have been built by others. Some robot kit sellers like lynxmotion (bottom) have assembly instructions for their products that can show you how things are done. Below is another resource that might be helpful. sorry your bot did not work for you, but maybe you can change it so it will work.

http://www.seattlerobotics.org/resources/RoboticsMiniFAQ.pdf
http://www.lynxmotion.com/driver.aspx?Topic=assem05
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All right I'll redesign my robot.
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