Re: Feit electric LED lamp autopsy.

The original bulb is the same or nearly the same as the one this thread began with... a 9.5 watt (60 watt equivalent) A19 LED bulb. I assume it will run less efficiently at 20V than it does at 120V, so as long as I keep the input below 9.5W I won't be overdriving the LEDs. I could measure the current but it isn't necessary as I know I'll be running it lower than it is designed for if I stay below 400mA input at 20V.

For interest sake-

There are 8 LED chips, each with 8 leds in them. (actually there is one chip that...

Re: Feit electric LED lamp autopsy.

Thanks momaka - I actually wanted to increase the current because my goal is to get a higher brightness from lower voltages allowing this bulb to run off a moderate number of Li-ion batteries. I do have the AP1910 datasheet, but I'm not familiar enough with electronics (yet) to confidently make connections between drawing and PCB. Your input was much appreciated.

So that means to increase current I need to decrease resistance at R9/R10. (I actually soldered at the capacitor and mosfet leads as they are larger, and with my essential...

Re: Feit electric LED lamp autopsy.

Hi found this thread while searching around about the AP1910 'Universal High Brightness LED Driver Controller' in these feit bulbs. I also have torn a few apart, and I'd like to see if I can run a 9.5watt feit bulb on a 5 or 6 Li-ion batteries.

The bulb lights at 20 volts input, but it is dim... about 1.2W total. Can anyone point out to me where "R4" might be hiding as pointed out by user "capwizard"? (according to the AP1910 spec, not as labeled on the board itself) I want to increase the current setting......

Re: New Members - please post your introductions here

Hi Stephen from Canada - love to take stuff apart and see how it works! I took Chem in university, some electronics theory trickled in during the process. Always find myself wanting to know more.

I own a copier business and I often take old machines apart to see what makes them tick. Seems like such a waste sending all those good components to the recycler to be melted down...

Found myself here after doing an LED teardown. I want to build a bike light from some of the components... have already gleaned...