I start to work out a better brighter circuit and change it to a parallel circuit and link up more LEDs.
I tried 4 leds first and found that it is not bright enough and start to change the whole wiring.
Putting 2 LEDs together as a unit and make the wires more tidy.
close up
It works well
After so much soldering my brand new soldering iron change color…..wonder why it became blue
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