Let's Make Robots!

Electrical Noise and Servos

Mr. Roboto's picture

"Warning! - Servos generate a lot of electrical noise. The PICAXE microcontrollers WILL NOT run correctly if a single power supply is used. This is because the electrical noise will disrupt the operation of the PICAXE microcontroller, constantly resetting it. If noise affects your circuit try soldering a large electrolytic capacitor as close as possible to the microcontroller power pins." - From the AXE030 Datasheet

I am quite confused. Is it saying to use a two power supplies AND a capacitor, or is it saying to use two power supplies OR a capacitor? I noticed that on the AXE024 there is not a seperate power supply used. I apoligize for my large number of forum posts, I am just trying to work out a circuit design.

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Chris the Carpenter's picture

Skip the second power, skip the cap, just be sure you have a resistor on the data wire of the servo. --If it ain't broke, don't fix it.

fritsl's picture

Short; Just use one power supply, I have never experienced any trouble!

Check the "Start here", it is only using one! And never heard of any problems from the many, many people building from it!