Power supply for 3 sevos

Other Hardware Motors, Mechanics, Power and CNC
1

Hey all,

I'm an arduino noob working on my first project, which is a 3 degree of freedom arm that I will eventually play tic tac toe against. I've been able to move the arm to specific positions using the 5V pin on my Uno, but when I try to make it move to more than one position it won't even put power to the servos. It may also have something to do with the way that I've created each cell in a tic tac toe board. I used a struct to create them, with elements that define each motor position and other things. If I try to use the values defined by the struct for arm positioning, it won't move. Any suggestions? I'm thinking it may be a scope issue.

moveTest.ino (1.7 KB)

2

Hi,

For an indication of what might be happening now read the two links in my signature

Duane B

3

Even very small servo motors could use a few hundred milli-amps.
That would heat up the voltage regulator of the Arduino, and the voltage regulator reduces the voltage if it gets to hot.

I had this problem already with a single servo (S3003), and a 9V power supply and the Arduino Uno.

You have to make your own +5V for the servo motors.