Designing the circuit that produces a true real looking candle-flame effect is very difficult to accomplish. I wanted to make a simple and quick way to drive higher current LED's without all the hard work. I was looking at a LED Tea Light at Michael's Crafts Store and the realization came to me why don't I just connect the flickering LED Tea Light to a drive circuit that can handle the higher current loads to produce a high current LED Driver. The hard part of the circuit design was completed by the purchase of the LED Tea Light that cost a couple of dollars.
Step 1: Take Apart TheTea Light
Michael's Crafts Store
GE (General Electric)
Flickering Tea Light LED
#362298 (One Tea Light)
#399217 (Six Tea Lights Value Pack)
Step 2: Circuit Design
but to make LED's flicker like the Tea Lights LED. A good starting point for R1 is 50K ohms and R2 is 20K ohms. The Output LED driver 2N3906 has a maximum IC of 200mA and that can be replaced with PN2907 for a maximum IC of 800mA.
The resistor Rx can be changed to control the current and voltage through the output LED's. I used 471 ohms for Rx to produce a maximum current of 25mA in each LED.
You can install many output driver sections together to produce more lumens of flickering light.
The circuit design makes a simulated candle flame effect to drive high current LED's, other high current loads, or HBLED, etc.