Arduino - Analogue Outputs

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In this video we use analogWrite and a low pass filter to control the analogue outputs on an Arduino board

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Thanks for your video, it is helping me to setup the analog outputs 0-5V on my Arduino Mega 2560, one question, what will be the typical resistor and capacitor specifications for an interface with a typical PLC 0-5VDC input channel?

jcsalazar

What is the resistance and capacitance value used here?

rajkumaraj

This has been very helpful to me as I was struggling to understand how to get a "simple" analog level out of my Arduino. I understand the notion of an RC time constant. But as many comments here ask, can you please provide some insight as to how to choose the RC Values? I assume it would be related to the PWM frequency, but also to how quickly the analog out is turned on and off. For example, I am interested in operating an individual electromagnet in a motor (not the motor itself) and might need to switch the electromagnet on and of at a rate of 48 KHz. I know enough electronics to know the R and C values will affect this performance but don't understand how to select those values or what the trade-offs will be.

CuriousCaine

Can you specify resistance and capacitance used in the video please? I need it for my final work for high school. It would be greatly appreciated!

ivanpopovic

Is it possible to create a synth using this technique? I expect the attack and decay to be too high for an audible frequency to play.

novygaming

Question. If I use a capacitor with less capacitance will the signal get more accurate?

musicproductionlogs

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