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Step 3Attaching the LEDs
Put the red LEDs in each of the holes on the triangles. Divide them into three groups (for each triangle). Each group contains 3 LEDs connected in series. Attach 1 resistor to each group. Test it with a battery to check if your connections are correct. Then test it with the three groups in parallel. Look at the picture for details.
When you are done testing, solder the LEDs and resistors in series and then solder all of the pieces together. (Use wire in between the LED and resistor because you need it longer.)
Put the triangles in the box and tape them with electrical tape. Make sure that you don't short the circuit.
When you are done testing, solder the LEDs and resistors in series and then solder all of the pieces together. (Use wire in between the LED and resistor because you need it longer.)
Put the triangles in the box and tape them with electrical tape. Make sure that you don't short the circuit.
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