FM TRANSMITTER BUG WITH HOUSEHOLD ITEMS
DIFFICULTY-MEDIUM
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What parts would you need:
MISC:
DIFFICULTY-MEDIUM
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What parts would you need:
MISC:
- Copper Clad PCB/ Perfboard
- Solid Gauge # 18 Wire
- Electret Microphone
- ¼" Bolt
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TRANSISTORS:
- 2N3904 General NPN Transistor (2x)
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Capacitors:
- 15pF or 40pF Trimmer Capacitor
- 100nF Ceramic Capacitor (2x)
- 10nF Ceramic Capacitor
- 4pF Ceramic Capacitor
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Resistors:
- 1M Ohm ¼w Resistor
- 100K Ohm ¼w Resistor
- 10K Ohm ¼w Resistor (3x)
- 1K Ohm ¼w Resistor
- 100 Ohm ¼w Resistor
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Tools:
- A Pair Of Pliers
- Soldering Iron
- Hot Glue Gun
This things are available in your local store or an old trimmer
PCB Layout
About The Circuit: These is the exact description of Art Swan, the circuit's Author, "This miniature transmitter is easy to construct and can be picked up on any standard FM receiver. It has a range of up to 1/4 mile or more. It's great for room monitoring, baby listening and nature research"
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Download Link: https://docs.google.com/file/d/0BwP5mrDBOvNYaHFnME5iaFpqME0/edit
-Thanks to ASCAS
Download the PDF file then print it with your printer's standard setting then cut the printed layout. Be careful when cutting, the tip of my thumb got sliced by the sharp cutter blade.
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Download
Link: https://drive.google.com/file/d/0BwP5mrDBOvNYaHFnME5iaFpqME0/edit?usp=sharing
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TIP:HERE IS A SIMPLE TUTORIAL FOR MAKING A PCB
https://youtu.be/Q6WJqjVleG0
-thanks to jvapda
READY WITH PCB NOW SOLDER THE COMPONENTS
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CONSTRUCTING A COIL!
Strip a solid gauge #18 wire. Use a 1/4" bolt then turn the wire 7-8 times
(Strip the coil on the simple screw and remove it,it would form a shape of a coil)
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CONSTRUCTING A ANTENNA
Solder a hook-up wire to the antenna pin, it's located on the 2nd transistor's collector pin. Use a maximum of 8 inches an a minimum of 5 inches
(Use a wire and solder it on a PCB it would act as an simple antenna)
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YOU WOULD NEED A BATTERY CLIP TO CONNECT A BATTERY TO YOUR PCB,USE A SIMPLE DRY DEAD BATTERY AND PLUCK THE UPPER HEAD OFF AND USE IT AS AN CLIP
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GLUE THE BATTERY CLIP AND PCB WITH THE A SIMPLE 9volt BATTERY
USE HOT GLUE
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TURN THE TRIMMER CAPACITOR WITH A SCREW DRIVER UNTIL YOU GET A WHITE NOISE IN YOUR FM RADIO
KEEP TUNING IT AND YEAH YOUR BUG IS READY AND CAN WORK THROUGH SEVERAL METERS!!! :D
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Q:Breadboard Version?
A:YES
I WOULD BE POSTING IT IN ANOTHER POST
++++++++++++++++++++++++MANISH++++++++++++++++++++++++++++++++++++++
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