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This is how to make a wireless telegraph that broadcasts on an average radio.
Steps
Wrap the wire 100 times around the iron nail.
Attach the switch between the nine volt battery and the switch so when you turn the switch on it completes the circuit.Advertisement
Affix a flexible and conductive. When you turn the switch it will turn on the electromagnet made by wrapping the nail with wire. The magnet will pull down the the flexible device and make a spark.
Find an unused AM channel on the radio you will know which channel it's sending to when you hear a blot noise when the telegraph is activated.
Use the small nails to fasten everything down.
Finished.Advertisement
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Tips
- The telegraph will only send a signal to nearby radio.Thanks
- It can send signals to radios further away if you connect a radio antenna after the coils of wire.Thanks
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Things You'll Need
- Wood plank (small)
- Iron nail
- Lots of wire
- Small nails that are conductive
- Electric switch
- Wire cutter
- Nine volt battery
- two pieces of flexible metal
- AM radio receiver
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