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Step 4LEDs
Now put in the LEDs. Be sure to match up the LEDS with their proper spots.
D1 Red
D2 Blue
D3 Green
D4 Yellow
NOTE: LEDs are polarized so be careful when inserting them. The longer leg of the LED is positive and the shorter is negative. Notice on the PCB that each circle has this straight edge part -- that's the negative direction. So insert the LED with the negative wire closest to the straight edge. (See photo)
Your LEDs might also have a similar straight edge on their bodies (or just a little gap). A couple of mine had either. Line up the straight edge on the LED to the one on the PCB. (See photo)
D1 Red
D2 Blue
D3 Green
D4 Yellow
NOTE: LEDs are polarized so be careful when inserting them. The longer leg of the LED is positive and the shorter is negative. Notice on the PCB that each circle has this straight edge part -- that's the negative direction. So insert the LED with the negative wire closest to the straight edge. (See photo)
Your LEDs might also have a similar straight edge on their bodies (or just a little gap). A couple of mine had either. Line up the straight edge on the LED to the one on the PCB. (See photo)
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