sg90 servos on LONG cables?
 

Hi,

Somewhat unusual question from a first-time poster. sg90 servos are popular to use as turnout motors on model railroads due to their low price. We're looking at using them, along with Arduinos for the electronics to control them. But the turnouts won't all be close to each other, plus the fact that I can run 16 servos off a single PWM driver board means that I'm wondering if I can run really long cables to them -- I'm talking about 10m for the longest runs that I'm currently envisaging.

Anyone know if this would cause any problems?

Should the long extension cables be twisted or flat?

You may need a booster at that length. Have you looked into something like this: https://www.servocity.com/4-channel-...sion-via-cat6/

Thanks, but at that price, it's cheaper for us to use more Arduinos and PWM driver boards wherever the runs become too long. But then the $64 question becomes: How long can the cables to the servos be?

FWIW that will handle 4 servos.
There is no set length. You will just have try and find out. You could try a booster too... But I really don't know what to $$$ much as I thought the cat6 extended to be very reasonable.
Keep in mind you you are asking this in an RC forum ... we don't have 10m long runs.

Can't see why you couldn't use some ethernet cables to do 10m quite easily. CAT5e should be around 2ohms at 10m, which at a peak current of say, 250mA, would result in a 0.5V drop (maybe use pairs for less). The frequencies of a servo PWM signal are very low in the grand scheme of things, so wouldn't expect much deterioration.