i have a program that output analog between 0 and 255 on with PWM stardard for arduino. i need to use that signal. amplify it and id like to use a 9v to drive it. but it has to go dim with low PWM and bright with high PWM. i have some lm317's or uln2308 transistor arrrays handy could i use the t…

PWM amplifier 9v or 12v

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