Things You'll Need:
- Batteries
- Battery Holder
- Push Button Switch
- Small 1.5 to 3 volt lamp.
- Insulated Copper Wire
- Wooden Base
- Duct Tape
- Small Electronic Buzzer
- Wire Stripper
- Lead Core Solder
- Soldering Iron
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Step 1
Match the voltage of your batteries with your components. For example, if you pick out a lamp that requires 3 volts of power and a buzzer that requires another 3 volts, you will need 4 c or d cell batteries (since each battery supplies 1.5 volts).
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Step 2
Wire one end of the battery holder to one end of the switch terminals (the switch will have two terminals). Expose the wire where it touches the terminal and ensure that you have made a solid connection. Solder the connection or tape the wire to the terminal to secure it.
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Step 3
Cut two lengths of copper wire, about 8-inches long each. Strip an inch of insulation from both ends of the wire. If you do not have a wire stripper, cut the edge of the insulation with scissors, and then peel it back with your fingernails.
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Step 4
Connect one piece of copper wire from the second battery terminal to one end of the light bulb. Make sure that the wires attached to the battery terminals do not touch.
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Step 5
Wire the other side of the light bulb to one end of the buzzer. Make sure that the two wires attached to the light bulb do not touch.
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Step 6
Wire the free end of the battery holder to the buzzer.
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Step 7
Press the button. The light should glow and the buzzer should buzz. If it doesn't, check your connections.
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Step 8
Tape the telegraph onto the base. You can arrange it any way you wish provided that the button is mounted firmly enough to stay in place when you push it and the light is visible.
