Hey i have an issue controlling my 4-axis robots using a potentiometer, so my current setup consists of 4 potentiometers that controls its respective servos, and 1 push button that controls the robot's gripper Now the 4 potentiometers are hooked up to the a0-a3 pins on the arduino uno board, but i …

Sounds like a solder bridge. Wemove everything but poti #1, test it. If it works add another one, test ....

Hey, i did that, the weird thing is, all the analog pins seems to work just fine with the others, i.e. a0 and a2, a2 and a3, even a0, a2, and a3, its only when i introduce a1 into the mix that it causes an issue, it essentially nullifies the value of a1, while the other pins would still give value, …

So A1 alone works, but A1 together with one of the others not?

You are cascading (chaining) the button and potentiometer ground potential through the mux. You must have grounds share one point.

Hey, while i don't really understand how this has to do with the A1 potentiometer itself, the buttons that are attached to the gnd of the other potentiometer is working just fine

It has nothing to do with a potentiometer on A1. It is basic electronics.

When you say grounds must share one point, do you mean joining all the ground cables from the controller or something else? (Controller as in the potentiometers and button)

[image] Common ground and why you need one General Electronics A common mistake for people new to electronics is to have 2 circuits fed from different power supplies with signals passing between the circuits, but with the grounds not connected. This leads to questions aski…

Im not sure if you can see it but the grounds are in fact connected [Screenshot_20240904-204505_Opera] As you can see i highlighted the ground connections from the potentiometer to the uno and it is a full connection

4-axis servo robotic arm (please help)

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xfpd September 18, 2024, 8:35pm 10

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4-axis servo robotic arm (please help)

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