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Step 3Begin assembly
Although it is possible (and tempting) to use LEDs of different colors, it is recommended you stay with ones with similar voltages: reds, ambers, and greens are in the 2v range, while blue, purple and whites are 3v or more. This avoids the problem with grossly varying brightnesses.
Begin with a 2" x 3" (5cm x 7.5cm) piece of perforated circuit board (perfboard) and arrange the LEDs as shown. Align the SHORTER (-) leads towards the top of the board, which I had marked with an arrow.
Making sure the LED is flat against the surface of the board, solder the negative lead ONLY. Do that for all 30 LEDs.
Now fold the longer (+) lead of each LED over to touch its neighbor and solder them together. You should have the + leads of 6 LEDs connected this way, all pointing to the right.
Begin with a 2" x 3" (5cm x 7.5cm) piece of perforated circuit board (perfboard) and arrange the LEDs as shown. Align the SHORTER (-) leads towards the top of the board, which I had marked with an arrow.
Making sure the LED is flat against the surface of the board, solder the negative lead ONLY. Do that for all 30 LEDs.
Now fold the longer (+) lead of each LED over to touch its neighbor and solder them together. You should have the + leads of 6 LEDs connected this way, all pointing to the right.
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