Asked — Edited

Digital Vs Analog Servos


Can i plug in an analog servo into one of the digital ports?

I ask because there are way more digital ports than analog ports.

I know an analog ir sensor and a ping sensor are for the analog ports only, right?

I want to buy analog servos cuz they are way cheaper, but there are only 9 analog ports.




Upgrade to ARC Pro

Synthiam ARC Pro is a new tool that will help unleash your creativity with programming robots in just seconds!


Analog servos will move with digital signal but aren't accurate. Digital are far more precise.


Use digital servos because the control position much better and usually faster/ more responsive than non digital. Ofcourse they cost more. It's personal preference based on your application


You can't select analog ports when configuring a servo in ARC >.> So that leaves the digital ports to connect the servo's to.


@budel0 That is untrue. You can either use a digital or analog servo connected to a digital port.

The difference between an analog servo and a digital servo is not the connection method. The difference is the electrical internals.

An analog servo uses the pulses to "tweak" the servo position each time it receives a pulse. There are 40 pulses per second. Which means, with an analog servo you will get a bouncy twitchy response.

A digital servo "smooths" the pulses and uses a bit of prediction to determine where the servo is supposed to be. It really just continues to hold the last position until a new pulse width is returned.

You can read about servos on our tutoral section by clicking here


@ DJ I ment that you can only select the 20 Digital I/O ports in ARC for controlling a servo. And not the 8 analog ports.

I'm sort of replying to: "I ask because there are way more digital ports than analog ports."


bud and sures, thanks.

and mr sures, i read all your posts, just making sure i dont buy a ton of the wrong servos...

local hobby people has a sale right now, foun a bunch of analog servos, micro and standard for 5 bucks, so im taking them.

thanks guys.


@dj thanks you explained it better :)