I'm new to Arduino and doing the starter projects. Just completed project 5 and the servo motor is twitching. I use the code from the library so I have review the code but did a bunch of trouble shooting on the layout. I've added an external power supply to power the servo independently which improved the performance some. Any recommendations?
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Could you also take a few moments to Learn How To Use The Forum.
Other general help and troubleshooting advice can be found here.
It will help you get the best out of the forum in the future.
Only YOU know what starter projects you are working on. To get the most out of this forum, please take a few minutes and read the sticky posts at the top of the forum. They explain all the information you need to provide as how best to post your sketch. The easier you make it for people to help you, the better.
After doing that, post a reply which includes your sketch, what servo motor you are using and a schematic (hand drawn is fine)
Is the external supply ground connected to Arduino board ground?
What is the external supply?
Servo twitching is almost always due to an inadequate power supply, like trying to use the Arduino 5V output for power.
Use a separate 5-6V power supply, capable of providing 1 Ampere per servo for small servos, 3 Amperes/servo for large ones. Don't forget to connect all the grounds.
Yes the ground is connected to the Arduino board-ground.
Thank you for your response. Did this using the provided Starter Kit 4 AA power supply. What component would be most likely to be failing. I'm not skilled in electronics and am wondering how I might test the performance of the individual components e.g. might the servo, potentiometer, or a capacitor be failing?
What servo are you using?
Are the batteries fresh?
There are many "starter kits". Post a link to the one you are using.
Check the voltage on the batteries. Like @ jremington says, lack of power is the most likely reason for twitching servos.
Does your kit have a 0.1uF cap (probably marked 104) or a 1uF cap? Put the cap between the analog input to which the pot wiper is connected and ground to filter noise. That may help.
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