Building electronics has been made much simpler with the advent of the printed circuit board (PCB). They consist of a silicon board with multiple holes drilled for electronic components to be inserted. The holes are connected by varying patterns of copper lines that allow current to flow between the components. Typically when you are using a PCB you will solder each component to the desired hole. However, for the purpose of testing a printed circuit board, soldering will not be necessary.
Instructions
1 Wrap one of the wires around the positive terminal of the 9-volt battery. This is positive wire.
2 Wrap the other wire around the negative terminal of the 9-volt battery. This is the negative wire.
3 Study your PCB and find two sets of connected holes, or four holes total.
4 Connect the positive wire to one of the holes in the first set.
5 Connect the anode (long wire) of the LED to the second hole of the first set of holes on the PCB.
6 Connect the cathode (short wire) of the LED to the first hole of the second set of holes on the PCB.
7 Attach the negative wire from the 9-volt battery to the second hole of the second set of holes on the PCB.
8 Check to make sure the LED lights up. If the LED is illuminated, that particular section of the PCB is working correctly.
9 Follow this method on other sections of the PCB until you have tested all areas.
