LED Slide Projector Retrofit Part 2: Fail

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The basic problem is the COB LED I used is too large to focus well.  I could solve it with various optical techniques.  The first thing I tried was to flip it around on the bulb tower to put the LED closer to the condenser lens.  It helped a little with the focal length but didn’t really solve the problem.


Flipped LED

So the plan now is I ordered a 4000 Lumen(!!!) 4 chip LED and a different power supply.  The new LED is only a few mm wide and much more of a point source of light.  I will keep this other 2700 Lumen COB for something else.


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