I have a 2000 civic which has a dome light that "fades" out when you shut the door. It takes about 6 or so seconds to dim out. I looked at this with my oscilliscope and when it dims out it starts flickering with PWM at 63.7hz. It goes from about 60% duty cycle down to about 5% then it shuts off. The problem is that when I use LEDs in there, you can see the flickering of the 63.7hz. With the regular factory LED bulb it will never flicker because the bulb can not heat up and glow or cool down that fast.
I made a video of this here: (sorry, it is sideways)
https://drive.google.com/open?id=149BNC7PA8Fv81TNguBFgFEfnkXbPAcyn
I was thinking of adding a capacitor to prevent it from showing the flicker so it has a some voltage during the PWM to prevent the flickering. I tried a 200 microfarad CAP, but this wasn't enough.
I measured the current draw of the original bulb and although it is 2.6ohms when it is off, when the bulb heats up it draws about 600 milli-amps. I am concerned that charging the capacitor when it is empty though. I don't know how to put a CAP big enough on there to accomplish this job without drawing too much current when the CAP isn't charged!
Can someone help suggest something?
I made a video of this here: (sorry, it is sideways)
https://drive.google.com/open?id=149BNC7PA8Fv81TNguBFgFEfnkXbPAcyn
I was thinking of adding a capacitor to prevent it from showing the flicker so it has a some voltage during the PWM to prevent the flickering. I tried a 200 microfarad CAP, but this wasn't enough.
I measured the current draw of the original bulb and although it is 2.6ohms when it is off, when the bulb heats up it draws about 600 milli-amps. I am concerned that charging the capacitor when it is empty though. I don't know how to put a CAP big enough on there to accomplish this job without drawing too much current when the CAP isn't charged!
Can someone help suggest something?