Author Topic: Led strip DC driver pwm problem  (Read 6409 times)

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Offline Simon

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Re: Led strip DC driver pwm problem
« Reply #25 on: October 17, 2014, 12:04:20 pm »
I assume your actually refering to the voltage equivalent to the duty cycle. You want the mosfet switched from 10V to ensure it's resistance is low and minimize losses and overheating. You need to only use the range of PWM that gets you the brightness you need, what are you using as an input ? you need to map input to output.
 

Offline cosminnciTopic starter

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Re: Led strip DC driver pwm problem
« Reply #26 on: October 17, 2014, 12:07:46 pm »

arduino pin goes tough an 4n25 optocoupler that drives the mosfet.
the output side of the optocoupler is powered from a 10v source.
the schematic is in the initial post.
 

Offline Simon

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Re: Led strip DC driver pwm problem
« Reply #27 on: October 17, 2014, 12:35:52 pm »
I know, it's just odd that you refer to the PWM output in terms of a "voltage" you need to map the output to your LED characteristic and of course to any input you are using to control it.
 


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