DX EXPLORER

ROMANIA • + Follow

inventor KR

FRANCE
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Description

FM Bug ( SPY Bug )

One transistor FM transmitter / Spy Bug ( vers. 2025 ) using a 2N3904 covering a distance between a few meters to a few hundred meters depending on the voltage you are powering it with and the length of the antenna. Please keep in mind that is made simply to learn and experiment. Is illegal to transmit on the public FM band on long distances so keep the transmitting distance to a minimum ( in many countries 25mW is the legal power for testing and experimenting no matter the frequency ). It can also double as a baby monitor. Stay out of trouble ! You will have to provide the external hardware. PCB Way will not provide these on the assembled version. More details in the Blog Article ( Coming Soon ).

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Schematic and Layout

FM Bug Schematic

FM Bug Schematic.jpg

Download BOM(Bill of materials)

Apr 10,2025

923 views

FM Bug ( SPY Bug )

One 2N3904 transistor FM SPY BUG built for fun and educational purposes. It can double as a baby monitor.

923

Published: Apr 10,2025

Standard PCB

BOM(Bill of materials)

PCBWay Donate 10% cost To Author

File Last Updated: 2025/11/19 (GMT+8)

File update record

2025-11-1905:45:11

Gerber file is updated.

2025-11-0220:40:35

Parts List (BOM) is updated.

2025-11-0219:10:02

Parts List (BOM) is updated.

2025-11-0117:10:05

Gerber file is updated.

2025-04-1103:06:10

Parts List (BOM) is updated.

2025-04-1103:06:10

Gerber file is updated.

2025-04-1023:04:12

Gerber file is updated.

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