hi guys - i am trying to control a series of 10x 1w 350mA 3.2V leds which are powered by a constant current led driver.
now i have seen lots of videos about how to do this with pwm logic and transistors like a mosfet, but they all use constant voltage sources (like a 12v battery).
my question is: can a mosfet be used to dim leds powered by constant current drivers without it significantly affecting or damaging the constant current driver? my thoughts are that it wouldn't, but not being an expert on how constant current drivers work i thought i would check.
thanks for your input!
one day when i know enough i promise i will answer someone's questions for a change..
i don't know the specific type but I am getting it from my local hardware store with the light and it looks a little like a pc switching power supply - but a lot smaller. one end plugs into ac and the other feeds the light..
A constant current switch-mode supply may have support for PWM (or it may not), and it
may have a current-control input for direct dimming - try and find out before buying if
its dimmable and if so how. This is a mains-powered device so not hackable.