Breaktru Forum

eCigarette Forum => Modding => Topic started by: kd0afk on January 18, 2013, 12:18:16 PM

Title: reading voltage of a PWM circuit.
Post by: kd0afk on January 18, 2013, 12:18:16 PM

How does one read the voltage output of a pulsewidth modulated circuit? I would like to make all my box mods like this but I don't know how to add a voltage display.

Title: Re: reading voltage of a PWM circuit.
Post by: CraigHB on January 18, 2013, 03:46:00 PM

It depends on what you're trying to do.  You're not being specific enough.  For a PWM output, RMS voltage is peak voltage times the square root of duty cycle.  So if you know duty cycle and peak voltage you can calculate RMS voltage.  If want to simply measure it, then you need an RMS voltmeter.  If you want it to fit in a mod, you'll need to build one with a mirco-controller and some coding.

Title: Re: reading voltage of a PWM circuit.
Post by: kd0afk on January 19, 2013, 01:15:12 AM

didnt want to see the "c" word. I thought it would be simpler than that.

Title: Re: reading voltage of a PWM circuit.
Post by: Breaktru on January 19, 2013, 06:36:43 AM

Quote from: kd0afk on January 19, 2013, 01:15:12 AM

didnt want to see the "c" word. I thought it would be simpler than that.

What's the "c" word? Coding?

Title: Re: reading voltage of a PWM circuit.
Post by: tintin on January 25, 2013, 01:27:57 AM

yes "c" world is programming in c.