2 layers70 × 50 mm
Eavesdrop2
SamyIOoOI/Eavesdrop
A "current carrier bug" that records the sound inside the area its plugged in and sends it back through the building's AC directly, evading RF detection as awhole.
25 partsGPL-3.0
2 layers70 × 50 mm
Evasdrop
SamyIOoOI/EavesdropA "current carrier bug" that records the sound inside the area its plugged in and sends it back through the building's AC directly, evading RF detection as awhole.
- Size
- 70 × 50 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 37
- Nets
- 26
- Pads
- 90
- Tracks, vias
- 307, 55
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 18 Sep 2026
- Updated
- 29 Sep 2026
Overview
Evasdrop is an open-source printed circuit board by SamyIOoOI, from the SamyIOoOI/Eavesdrop repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 70 × 50 mm with 37 parts on 26 nets, routed with 307 tracks and 55 vias.
It is built around the HLK-PM01, ICL7660N and TL072, with the BD139 and CFPS-72 among its other parts. Its parts include 13 capacitors, 9 resistors, 2 ICs, 1 transistor and 1 inductor. It belongs with the audio and music boards of this library.
Main components
5
HLK-PM01
DIP,34x24mm0.1W 100mVp-p 15mm 20mm 34mm 3W 3kV 5V 700mA 73% 85VAC~265VAC AC-DC Short Circuit Protection、Over Current Protection、Fault self-recovery ±0.2% 插件,34x20mm AC-DC Power Modules ROHSHI-LINKAC-DC Power Modules
ICL7660N
DIP-83V~9.5V DIP-8 Charge Pumps ROHSHGSEMIDC-DC Converters
TL072
SOP-8-18V~18V 0℃~+70℃ 1.4mA 1.5nA 10V/us 10mV 2 2.5nA 3MHz 85dB SOP-8 Operational Amplifier ROHSGcoreOperational Amplifier
BD139
TO-126-65℃~+150℃ 1 NPN 1.5A 10uA 12.5W 500mV 5V 63 80V NPN TO-126 Bipolar (BJT) ROHSSTMicroelectronicsBipolar (BJT)
CFPS-72
SMDSMD SMT ROHSIQDUncategorised
README
README.mdEavesdrop
Main Features - Usage - PCB & Schematic - Gerber Files - Kicad (Schematic & PCB) - BOM - BOM (File) - Credits
How would you feel if your own fridge was spying on you? Maybe even your tv, maybe the fryer, maybe the wall outlet you charge this device with. maybe even your charger. Well that could very well be a carrier bug. Just like Eavesdrop.
A "current carrier bug" is a spy tool that records the sound inside the area its plugged in and sends it back through the AC power its connected to directly, evading most detection devices available in the market that rely on RF to detect these devices.
No matter where you are. The bug listens as long as there's electricity flowing in the bugged device.
Main Features
-
Undetectable (via RF Detectors that are commonly used)
-
Secretive (but requires prior access to the room)
-
Can be planted into any device, your lamp, your tv, your pc, ANYTHING can become a bug with one plug.
Usage of Eavesdrop
1- Insert it into the outlet or any device that takes in power from the wall and make sure the microphone jack is connected to proper microphone element such as an electret mic.
2- Connect the passive & active AC wires to their respective locations via the male header on the pcb, each header reads if its N (neutral) or L (live). Reversal could cause irreversible damage. Use a test screw driver to make sure you're connecting the right ones.
3- connect the receiver , when required to listen to the broadcast, to an outlet that is in the same grid as the target room/building.
4- Make sure that both the receiver and the sender are at the same wavelength via calibration. Refer to the schemati for more details.
5- Use the volume control knob to increase/decrease th sound level.
Note that usage of Eavesdrop or any other spying device is illegal when taken out of personal hobby boundaries and used beyond one's own property. (If your device bleeds into the grid of neighbouring properties you may still be fined.)
I hold no responsiblity on the misuse of this project for illegal activities such as but not limited to: Unathorized Surveillance, Stalking, and damage to property.
My work is done for the sake of open-sourcing, eduction and self-learning. Not to inflict harm.
Design
Eavesdrop Sender Schematic
Eavesdrop Sender PCB
Eavesdrop Sender PCB (Model)
Eavesdrop Receiver Schematic
Eavesdrop Receiver PCB
Eavesdrop Receiver PCB (Model)
BOM
Credits: BOM converted from XLSX to md on tableconvert.com
Credits
Made by SamyIOoOI on github under the GPL 3.0 Licence.
Parts
37| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100 nF | Capacitor_SMD:C_0402_1005Metric | C1, C3, C43, C44 |
| 4 | MountingHole_2.2mm_M2 | MountingHole:MountingHole_2.2mm_M2 | M2, M2, M2, M2 |
| 3 | 10 uF | Capacitor_SMD:C_0603_1608Metric | C6, C23, C24 |
| 3 | 47 uF | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A | C42, C45, C46 |
| 1 | 0.1 uF | Capacitor_SMD:C_0603_1608Metric | C14 |
| 1 | 100 | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 100 uF | Capacitor_SMD:C_1210_3225Metric | C11 |
| 1 | 100 uF | Capacitor_SMD:C_0402_1005Metric | C2 |
| 1 | 100K | Resistor_SMD:R_0603_1608Metric | R23 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | R21 |
| 1 | 10K R | Potentiometer_SMD:Potentiometer_Bourns_TC33X_Vertical | RV6 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R22 |
| 1 | 10µH | Inductor_SMD:L_0805_2012Metric | L1 |
| 1 | 2.2K | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 220K | Resistor_SMD:R_0603_1608Metric | R25 |
| 1 | 4.7K | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 47 | Resistor_SMD:R_0603_1608Metric | R24 |
| 1 | 470pF | Capacitor_SMD:C_0603_1608Metric | CY4 |
| 1 | 47k | Resistor_SMD:R_0603_1608Metric | R20 |
| 1 | BD139 | Package_TO_SOT_THT:TO-126-3_Vertical | Q1 |
| 1 | CFPS-72 | Oscillator:Oscillator_SMD_IQD_IQXO70-4Pin_7.5x5.0mm | Y1 |
| 1 | Conn_01x02_Pin | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | N AC |
| 1 | ED8_4 | Transformer_SMD:Transformer_ED8_4-Lead_10.5x8mm_P5mm | T1 |
| 1 | HLK-PM01 | Converter_ACDC:Converter_ACDC_Hi-Link_HLK-PMxx | PS1 |
| 1 | ICL7660 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U8 |
| 1 | Microphone | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | MK2 |
| 1 | TL072 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U18 |
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Questions
How big is the Evasdrop PCB?
It measures 70 × 50 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Evasdrop use?
37 parts, built around the HLK-PM01, ICL7660N, TL072 and BD139. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Evasdrop KiCad files?
From the SamyIOoOI/Eavesdrop repository on GitHub, at the commit this page was made from: the board is Kicad Source Files/evasdrop.kicad_pcb and its schematic Kicad Source Files/eavesdrop Receiver/eavesdrop2.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Evasdrop design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).