Let’s try this…
I didn’t take pictures of the final assembly, and now it’s back packaged in the case and mounted to my opener… if this is inadequate maybe I could take it apart for further shots.
I did take a poor picture of the board itself, prior to any modifications. The LED is on the “back” with the piezo – see area with the red box.
The red box is then zoomed up here with crude Paint.NET sketch showing what I did.
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I removed the chip LED as carefully as I could, note there are actually 3 pads, I presume Anode, Cathode (on ends visible) and a center pad likely for heat sinking (it runs at nearly 3W if on continuous).
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I created a series combination of axial parts: a 2.4 Ohm, 3W resistor with a 1N4004 diode - just because it is what I had. I would have preferred a larger wattage diode. I really think it would work fine with a single ~3.5 Ohm resistor and no diode, but I did not try this.
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I soldered the diode/resistor combination to the LED pads as shown in my diagram - anode side towards the bottom of the board (furthest pad from the piezo). I did this after carefully bending leads to ensure it would fit in the case after assembled.
So far it still seems to work every time I’ve tried. This is maybe 5 more uses since I put it back in last week.
Here is also a shot of the top of the circuit board, I didn’t do anything with this.
Sorry about the photo quality (overhead lighting glare). When I took them I didn’t take the time to find a suitable environment to take better shots.