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Spy Phone Bug Transmitter Circuit - ElectroSchematics.com
https://www.electroschematics.com/phone-spy-transmitter-broadcaster/#:~:text=The%20spy%20phone%20transmitter%20consists%20of%20two%20sections%2C,with%20preset%20VR1%2C%20works%20as%20a%20voltage%20divider.
10 Simple FM Transmitter Circuits Explained - …
https://www.homemade-circuits.com/spy-bug-circuits/
For the wireless spy transmitter circuit everything becomes pretty simple and you just have to hide the transmitter circuit in some suitable place, like under the table, couch, sofa etc. Parts List R1 = 10K, R2 = 10k, R3, R4 = 27K, R5 = 1.5 M, C1 = 104, C2 = 220uF/25V, T1 = 188, T2 = 187, MIC = electret mic, IC1 = 741,Power = 9 volt battery
How to Build a Spy Circuits - FM Bug Transmitters
https://makingcircuits.com/blog/spy-circuits-fm-bug-transmitters/
Examining a Two Transistor Spy Circuit Adding a transistor stage to the above talked about single transistor FM transmitters could possibly allow the designs with significant sensitivity. An electret MiC itself has an integrated FET making it very economical and makes it a stand alone vibration amplifier device.
Mini Audio Transmitter : 8 Steps (with Pictures ...
https://www.instructables.com/Mini-Audio-Transmitter/
This transmits FM waves so you could easily get the signals on your mobile phone, radios, etc. As the name and the picture indicates it is very small and is approximately the size of a 9v battery clip. This transmitter is like the ones in the movies which are used to spy on people or try to record conversations, well don't use this this to spy on anyone, its just for educational purpose …
DIY Mini Spy FM Radio Transmitter - Smallest FM ...
https://www.instructables.com/DIY-Mini-Spy-FM-Transmitter-Bug-Smallest-FM-Transm/
DIY Mini Spy FM Radio Transmitter - Smallest FM Transmitter Ever: Hi this is Kedar here so If wanted to spy on anyone this instructable is for you today we are going to make a FM transmitter bug spy that will transmit the audio onto Fm frequencies This bug is impressively tiny so you can you fit it in any kind of …
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