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Topic: Control Servo Using Microphone Frequencies (Read 947 times) previous topic - next topic

rlm42

Also when you say it needs more than 400mA.. We were running it off the USB supply which is 500mA max and it was working off that?

Grumpy_Mike

#16
May 03, 2017, 01:22 pm Last Edit: May 03, 2017, 01:25 pm by Grumpy_Mike
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I read somewhere to use a current limiting resistor on the signal wire between the Arduino pin and the servo input
That is crap.

You said:-
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The way it is set up is I have a 22ohm resistor (9V / 22ohm = approx 400mA to give it close to what the USB max current output is)
That does not say you had a resistor in the signal line. Those words say the resistor in in seriese with the battery.

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Also we tried it without the resistor and our other servo motor (same type) smoked is now dead.
So you did something else wrong.

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We were running it off the USB supply which is 500mA max and it was working off that?
Probably because you were not testing it correctly. Functionality does not equal working fine.

rlm42

http://forum.arduino.cc/index.php?topic=88094.0

Grumpy_Mike

#18
May 03, 2017, 01:27 pm Last Edit: May 03, 2017, 01:28 pm by Grumpy_Mike
If you mean the comment:-
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3) Use a current limiting resistor on the signal wire between the Arduino pin and the servo input
It is crap.

Anyway are you saying you can get anything approaching 400mA from a signal wire? You can't.

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