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Step 3Layout the parts/ Prepare the springs
This part is useful to make sure you get the polarity the right way round on the battery. If its backwards, the LED wont light at all. The idea is to have one end of the battery attach to the switch, and the other end to a wire that will run the length of the pen (on the inside) and attach to the bottom stopper.
To make sure the battery has a good contact, were going to build some springs out of the heavier gauge wire, similar to the ones found on 'real' battery holders. The easiest way to do this is to use a pair of pliers to wrap the stripped heavy gauge wire into a series of coils, then pull the ends so that the coil expands into a spring.
To make sure the battery has a good contact, were going to build some springs out of the heavier gauge wire, similar to the ones found on 'real' battery holders. The easiest way to do this is to use a pair of pliers to wrap the stripped heavy gauge wire into a series of coils, then pull the ends so that the coil expands into a spring.
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