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Step 3Put It Together
Everything in this simple circuit is placed in series and the parts can be arranged in any order with one exception. The LED will only light if the battery polarity is correct.
Cut an appropriate length of the 5/8" OD tubing and cut a hole close to one end to accomadate the switch. Keep in mind how the pen will fit in your hand and where your finger will lie to operate the button. Since we hold this light like a pen, I place the switch where we can easily push it with the index finger.
Solder the LED, the resistor and the wires in series. Remember, the resistor can be placed anywhere in the circuit.
I place heat shrink over the exposed wires and heat the shrink with a lighter, protecting against short circuits.
Then fold the wiring up and slide inside of a 1" piece of the smaller 1/2" OD plastic tubing.
Cut an appropriate length of the 5/8" OD tubing and cut a hole close to one end to accomadate the switch. Keep in mind how the pen will fit in your hand and where your finger will lie to operate the button. Since we hold this light like a pen, I place the switch where we can easily push it with the index finger.
Solder the LED, the resistor and the wires in series. Remember, the resistor can be placed anywhere in the circuit.
I place heat shrink over the exposed wires and heat the shrink with a lighter, protecting against short circuits.
Then fold the wiring up and slide inside of a 1" piece of the smaller 1/2" OD plastic tubing.
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Feb 2, 2010. 8:20 AMtjmax139
says:
i got bored so i stoped
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