6 layers75 × 78.4 mm
Poe backplate
dotstartech/wall-panel
Wall mounted 4 inch touch display panel with CM4 inside
125 parts445
2 layers43.2 × 44.5 mm
Wavecatcher - simple board for acoustic cryptanalysis
- Size
- 43.2 × 44.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 68
- Pads
- 152
- Tracks, vias
- 247, 34
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 25 Mar 2018
- Updated
- 12 Aug 2018
Overview
Umic is an open-source printed circuit board by anfractuosity, from the anfractuosity/wavecatcher repository on GitHub. It is a 2-layer board of 43.2 × 44.5 mm with 34 parts on 68 nets, routed with 247 tracks and 34 vias.
It is built around the LP38693MP-3.3 and SPH0641LU4H-1. Its parts include 14 capacitors, 10 resistors, 2 ICs, 2 diodes and 2 connectors. It belongs with the STM32 boards of this library.
Main components
2
LP38693MP-3.3
SOT-223-5-40℃~+125℃@(Tj) 1 10V 3.3V 500mA 550mV@(0.5A) 55dB@(120Hz) 55uA Fixed Positive Under Voltage Lockout、Over Current Protection、Over Temperature Protection、Enable SOT-223-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SPH0641LU4H-1
LGA-5(3.5x2.7)-26dB 0.98mm 1.8V 2.65mm 235uA~270uA 3.5mm 64.3dB Omnidirectional Omnidirectional pickup LGA-5(3.5x2.7) MEMS Microphones ROHSKnowlesMEMS Microphones
README
README.mdwavecatcher
https://www.anfractuosity.com/projects/wavecatcher/ - please see this website for more detail on the project.
The project will be used for acoustic cryptanalysis - "Acoustic cryptanalysis is a type of side channel attack that exploits sounds emitted by computers or other devices".
A number of aspects of computers emit ultrasound including SMPSs to inductors and capacitors present on the computer's motherboard itself.
You will likely require Kicad 5 to use the schematic/pcb layouts.
Software
The software is now capable of extracting audio from the PDM microphone enabling playing of the audio with SoX.
I now need to swap the simple summing PDM to PCM converter, to enable better fidelity audio.
Hardware
The PCB was manufactured and assembled using Macrofab. I plan to eventually revise the PCB at some point making use of line length matching of USB tracks and more curved PCB tracks.
I conducted a little benchmark of the STM32F3 chip's USB performance and get roughly 6Mbps received from it on my computer. The bandwidth may vary a fair bit, in the order of megabits depending on your USB controller!
Creative Commons Licence
Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 22 | Resistors_SMD:R_0603 | R3, R4, R6, R7, R8, R9 |
| 5 | 100nF | Capacitors_SMD:C_0603 | C3, C11, C12, C13, C14 |
| 2 | 10pF | Capacitors_SMD:C_0603 | C1, C4 |
| 2 | 1uF | Capacitors_SMD:C_0603 | C6, C7 |
| 2 | 20pF | Capacitors_SMD:C_0603 | C2, C5 |
| 1 | 100k | Resistors_SMD:R_0603 | R5 |
| 1 | 10nF | Capacitors_SMD:C_0603 | C9 |
| 1 | 1k5 | Resistors_SMD:R_0603 | R2 |
| 1 | 1uF | Capacitors_Tantalum_SMD:CP_Tantalum_Case-R_EIA-2012-12_Hand | C8 |
| 1 | 32.768kHz | Crystals:Crystal_SMD_TXC_9HT11-2pin_2.0x1.2mm | Y1 |
| 1 | 390 | Resistors_SMD:R_0603 | R1 |
| 1 | 4.7uF | Capacitors_Tantalum_SMD:CP_Tantalum_Case-R_EIA-2012-12_Hand | C10 |
| 1 | 68 | Resistors_SMD:R_0603 | R10 |
| 1 | 8MHz | Crystals:Crystal_SMD_Abracon_ABM3-2pin_5.0x3.2mm | Y2 |
| 1 | Conn_01x06 | Pin_Headers:Pin_Header_Straight_1x06_Pitch2.54mm | J2 |
| 1 | D_Schottky | Diodes_SMD:D_0603 | D1 |
| 1 | LED | LEDs:LED_0603 | D2 |
| 1 | LP38693MP-3.3 | LP38693MP-3.3:SOT150P696X180-5N | U1 |
| 1 | SPH0641LU4H-1 | SPH0641LU4H-1:MIC_SPH0641LU4H-1 | MK1 |
| 1 | STM32F302RBTx | Housings_QFP:LQFP-64_10x10mm_Pitch0.5mm | U2 |
| 1 | SW_MEC_5G | Buttons_Switches_SMD:SW_MEC_5GSH9 | SW1 |
| 1 | USB_B_Micro | Connectors:USB_Micro-B_10103594-0001LF | J1 |
Questions
How big is the Umic PCB?
It measures 43.2 × 44.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Umic use?
34 parts, built around the LP38693MP-3.3 and SPH0641LU4H-1. 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 Umic KiCad files?
From the anfractuosity/wavecatcher repository on GitHub, at the commit this page was made from: the board is umic.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Umic design in my own project?
Its repository states no licence, so its author keeps all rights: ask anfractuosity before reusing the design.
Similar boards
- 6 layers157.8 × 95.2 mm
Covg daq v2
lucask07/open_covg_daq_pcb
DAQ (ADCs and DACs) PCB for the digital ion channel amplifier project.
600 parts9GPL-3.0 - 4 layers112 × 57 mm
- 6 layers102.6 × 62.6 mm
- 2 layers522.8 × 310.4 mm
MAG Plus
spel-uchile/S2_S3_PS_MAG_PCBs
A summary of the different MAG derived PCBs used in SUCHAI 2, SUCHAI 3 and Plansat Satellites
228 parts - 4 layers25.8 × 35.7 mm
- 2 layers32 × 49 mm
Esp32c3
YORROY123/kicad-scripted-pcb
Three KiCad 10 PCBs designed entirely as Python code with layered verification
26 parts1MIT - 4 layers179.6 × 161 mm
