LED Lamp PCBs Arrived
I ordered the parts for it yesterday, and almost screamed when several of the components were out of stock. But I found some shady sources to get the extra parts from.
LED Lamp R&D Done
This is a picture of an 15v 1A led being run from my switching regulator which is connected to 120v. All of the R&D on the lamp is done, now I just have to make the pcb, test the pcb circuit, then make the led mcpcb, test the led mcpcb, then make the case and I am done with the lamp.
-Rez
Buck Regulator Working So Far
With another rs232 board, 3 optocouplers, and two more leds fried, as well as another order from Digikey I have the buck regulator working up to 30v.
Some things I learned, a valley fill circuit really doesn't help with 120hz ripple at low wall voltages(<30). Also it is a lot simpler to just use a large input cap for the wall voltage so far from what I have seen.
Another thing that I found out is that even though the ground side of the leds is floating half the time, that is actually where you should connect the differential amplifier ground lead. The voltage will read as much as is dropping across the leds. It was confusing for me because the line wouldn't move until I came around 30% of rated current, but that is actually how it works. As you increase the voltage, the scope will read higher, until it reads spec volts at spec amps.
Now all I have to do is get it working at 120v, which just requires a 120v linear regulator, and 120v rated caps.
-Rez