Making a LED (light emitting diode) circuit board is a good exercise for those new to electronics. It does not require a lot of components or expertise, and it is a useful circuit to know. When making a LED circuit board, you should be familiar with how a circuit board works. Columns of holes are electrically connected with exceptions for the first and last rows of holes. The first and last rows (rather than columns) of holes are electrically connected and are slightly offset from the main grid. This property of a circuit board makes the job of building a LED circuit board much simpler.
Wrap an end of your first wire around the positive terminal of your 9-volt battery.
Insert the other end of your first wire into the hole of your circuit board located in the first row and the first column.
Insert one end of your 100 ohm resistor into the same row as your wire, but this time in the second column of your circuit board.
Place the other end of your 100 ohm resistor in the hole of your circuit board located in the second row and second column.
Insert the anode (long wire) of your LED into the hole located in the third row, second column of your circuit board.
Insert the cathode (short wire) of your LED into the hole located in the third row, third column of your circuit board.
Wrap an end of your second wire around the negative terminal of your 9-volt battery.
Insert the other end of your second wire into the hole of your circuit board located in the fourth row, third column. You now have a completed LED circuit board and your light emitting diode will illuminate.
Things You'll Need
1" wire, 2 pieces
100 ohm resistor
Use masking tape to help secure the wires to the 9-volt battery terminals (just make sure there is metal-on-metal contact).