This video shows The Amazing Magic Flashlight in action. A concealed magnet (taped to the bottom of my hand) is brought close and then pulled away from the flashlight causing the light to turn on and off. In the last step of this instructable is another video that shows how the push button switch appears to have no effect but when switched on and a magnet is near, the light turns on and off.
Step 1: Parts List
- A "normally open" magnetic reed switch. I obtained mine from Jameco Electronics. The switches are part number 171872 and cost $0.85 each. As you can see in the images, these switches are made of glass, so I recommend you buy several just in case you break one.
- 24" of flexible wire. I used speaker wire but you can use whatever you have handy as long as the wire is very flexible.
- Electrical Tape.
- 6V Flashlight/Lantern.
- Soldering iron and solder.
- Wire cutters.
- Wire stripper.
Step 2: Modify the Flashlight Wiring
- Unscrew the top of the flashlight and you'll see the wires from going from the battery to the switch and from the switch to the lamp assembly as shown in the first image.
- Cut the wire that connects the switch to the lamp assembly as shown in the second, third, and fourth images.
Step 3: Prepare the Extension Wires
- Cut two 12" lengths of the flexible wire and strip a small amount of insulation off the ends.
- Solder one end of one of the wires to the wire coming from the switch in the flashlight as shown in the first image.
- Wrap a small piece of electrical tape around the soldered wires, as shown in the second image, in order to provide insulation from the other wires and the battery terminals inside the flashlight.
- Solder the end of the second piece of wire to the wire attached to the lamp as shown in the third image.
- Wrap a small piece of electrical tape around this connection as shown in the fourth image.
Step 4: Prepare the Magnetic Reed Switch
- Solder the ends of the extension wires to the magnetic reed switch as shown in the first image.
- Cut two small pieces of electrical tape and use them to insulate the exposed wire as shown in the second image.
- Using electrical tape, attach the magnetic reed switch to the inside of the case near the top and near the handle. Placement of the magnetic reed switch is important - to make the magic happen you will need to bring the magnets close the spot where you've attached the switch. The ideal location would be right under the handle but for the flashlight I used, there wasn't room, so I placed the switch under the top near the handle.
- Carefully tuck the wires into the flashlight and screw the lamp assembly onto the body of the lamp.
Step 5: Voila!
To make using The Amazing Magic Flashlight more impressive you could consider making a magnetic ring that you wear and use that to trigger the magnetic reed switch. You could attach a magnet to a ring (a neodymium magnet would work great), try to magnetize an iron ring, or buy a magnetic ring like the Wizard PK Ring.