4 layers100 × 100 mm
Dac16
tombueng/hilprobe
HILprobe: multi-function UUT probe for hardware-in-the-loop testing - RS-485, CAN FD, logic analyzer, 4-ch scope, two programmable UUT supplies. KiCad 10, 6 layers, RP2350B + ESP32-S3.
200 parts
4 layers60 × 46 mm
AFE v1
auselia/afe_pcbThe first acoustic emission (AE) front-end board of Auselia. It turns the charge of a piezoelectric sensor into 14-bit samples and a wake-up signal.
- Size
- 60 × 46 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 167
- Nets
- 74
- Pads
- 404
- Tracks, vias
- 1,023, 95
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 12 Oct 2026
- Updated
- 12 Oct 2026
Overview
AFE v1 is an open-source printed circuit board by auselia, from the auselia/afe_pcb repository on GitHub. It is a 4-layer board of 60 × 46 mm with 167 parts on 74 nets, routed with 1,023 tracks and 95 vias.
It is built around the OPA2365AID, OPA1642AID and TPS7A4901DGN, with the BAT54C among its other parts. Its parts include 50 capacitors, 40 resistors, 6 ICs, 4 connectors and 1 diode.
Main components
4
OPA2365AID
SOIC-8-40℃~+125℃ 0.2pA 0.2pA 100dB 1uV/℃ 2 2.2V~5.5V 200uV 25V/us 4.5nV/√Hz@100kHz 50MHz 5mA 65mA ESD protection Rail-to-Rail Input, Rail-to-Rail Output SOIC-8 Operational Amplifier ROHSTexas InstrumentsOperational AmplifierOPA1642AID
SOIC-8-18V~-2.25V、2.25V~18V -40℃~+85℃ 0.00005% 1.8mA 2 Pairs Differential Inputs 2-Channel Overvoltage protection SOIC-8 Audio Amplifiers ROHSTexas InstrumentsAudio Amplifiers
TPS7A4901DGN
TSSOP8+36V, +150mA, Ultralow-Noise, Positive Linear RegulatorTexas InstrumentsUncategorised
BAT54C
SOT-231 Pair Common Cathode 200mA 2uA@25V 30V 600mA 800mV@100mA SOT-23 Schottky Diodes ROHSNexperiaSchottky Diodes
README
README.mdAFE PCB
The first acoustic emission (AE) front-end board of Auselia. It turns the charge of a piezoelectric sensor into 14-bit samples and a wake-up signal.
The signal goes through a charge amplifier, a high-pass filter, a gain stage, a low-pass filter, a differential driver (THS4531) and an ADC (ADS7057). A window comparator (TLV3202) gives the wake-up signal. The board runs from 9 V, measures 60.1 mm by 46.1 mm and has 4 layers.
The board is not built or measured yet.
Contents
hw/: the KiCad 10 project, the fabrication files (Gerber, drill, BOM, pick and place), the DRC and ERC reports, and the scripts that built and routed the board.doc/: the design description as a PDF, with its LaTeX source and the checked part list.sim/: the ngspice simulations, and insim/data/the seven recorded AE events that the design starts from.
Use
- Open
hw/AFE_v1.kicad_proin KiCad 10. - To rebuild the PDF, run
tectonic main.texindoc/. The fonts are indoc/fonts/. - The simulations need the TI vendor models.
sim/models/SOURCES.mdtells where to get them.
Parts
167| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | 100nF | Capacitor_SMD:C_0603_1608Metric | C3, C12, C20, C23, C27, C31, C33, C38, C40, C41, C42, C43, C44, C45, C46, C47 +2 |
| 8 | 10uF | Capacitor_SMD:C_0805_2012Metric | C1, C2, C4, C7, C9, C13, C19, C30 |
| 7 | 1.00k | Resistor_SMD:R_0603_1608Metric | R15, R16, R20, R21, R26, R27, R38 |
| 7 | 1uF | Capacitor_SMD:C_0805_2012Metric | C24, C28, C32, C34, C35, C39, C48 |
| 6 | 100k | Resistor_SMD:R_0603_1608Metric | R2, R4, R7, R11, R12, R40 |
| 4 | 10k | Resistor_SMD:R_0603_1608Metric | R22, R23, R30, R31 |
| 4 | 10nF C0G | Capacitor_SMD:C_0603_1608Metric | C5, C6, C8, C10 |
| 4 | M3 | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | 10R | Resistor_SMD:R_0603_1608Metric | R24, R32, R33 |
| 3 | 22R | Resistor_SMD:R_0603_1608Metric | R34, R35, R36 |
| 3 | 470pF C0G | Capacitor_SMD:C_0603_1608Metric | C21, C22, C25 |
| 3 | BLM21 600R@100M | Inductor_SMD:L_0805_2012Metric | FB1, FB2, FB3 |
| 2 | 1.10k | Resistor_SMD:R_0603_1608Metric | R28, R29 |
| 2 | 220pF C0G | Capacitor_SMD:C_0603_1608Metric | C17, C26 |
| 2 | 33k | Resistor_SMD:R_0603_1608Metric | R37, R39 |
| 2 | 4.02k | Resistor_SMD:R_0603_1608Metric | R14, R17 |
| 2 | 50R | Resistor_SMD:R_0603_1608Metric | R6, R10 |
| 2 | OPA2365 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U4, U5 |
| 2 | TPS7A4901 | Package_SO:HVSSOP-8-1EP_3x3mm_P0.65mm_EP1.57x1.89mm | U1, U2 |
| 2 | TP_GND | TestPoint:TestPoint_Pad_D1.0mm | TP6, TP7 |
| 1 | 100R | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 100pF C0G | Capacitor_SMD:C_0603_1608Metric | C15 |
| 1 | 10M | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | 10k trim | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV1 |
| 1 | 10pF C0G | Capacitor_SMD:C_0603_1608Metric | C11 |
| 1 | 150pF C0G | Capacitor_SMD:C_0603_1608Metric | C16 |
| 1 | 178k | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 19.1k | Resistor_SMD:R_0603_1608Metric | R19 |
| 1 | 1M | Resistor_SMD:R_0603_1608Metric | R8 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C29 |
| 1 | 2.00k | Resistor_SMD:R_0603_1608Metric | R13 |
| 1 | 3.3uF | Capacitor_SMD:C_0805_2012Metric | C37 |
| 1 | 324k | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 47pF C0G | Capacitor_SMD:C_0603_1608Metric | C14 |
| 1 | 49.9R | Resistor_SMD:R_0603_1608Metric | R25 |
| 1 | 5V_EXT -> +5V (open) | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | SJ21 |
| 1 | 680pF C0G | Capacitor_SMD:C_0603_1608Metric | C36 |
| 1 | 9.09k | Resistor_SMD:R_0603_1608Metric | R18 |
| 1 | 9V IN | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | ADS7057 | Auselia:ADS7057_X2QFN-8_1.5x1.5mm | U7 |
| 1 | BAT54C | Package_TO_SOT_SMD:SOT-23 | D2 |
| 1 | CAL SMA | Connector_Coaxial:SMA_Amphenol_132134_Vertical | J4 |
| 1 | CA_OUT | TestPoint:TestPoint_Pad_D1.0mm | TP10 |
| 1 | CA_SUM | TestPoint:TestPoint_Pad_D1.0mm | TP9 |
| 1 | CA_TAP | TestPoint:TestPoint_Pad_D1.0mm | TP11 |
| 1 | CMP tap: 1-2=LP_OUT, 2-3=GAIN_OUT | Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm | SJ20 |
| 1 | CMP_N | TestPoint:TestPoint_Pad_D1.0mm | TP28 |
| 1 | CMP_P | TestPoint:TestPoint_Pad_D1.0mm | TP27 |
| 1 | Cal enable (open) | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | SJ2 |
| 1 | Cf100pF | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | SJ4 |
| 1 | Cf150pF | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | SJ5 |
| 1 | Cf220pF | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | SJ6 |
| 1 | Cf47pF | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | SJ3 |
| 1 | CfDNP/user | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | SJ7 |
| 1 | DNP/user C0G | Capacitor_SMD:C_0603_1608Metric | C18 |
| 1 | FDA_IN | TestPoint:TestPoint_Pad_D1.0mm | TP19 |
| 1 | FOM | TestPoint:TestPoint_Pad_D1.0mm | TP22 |
| 1 | FOP | TestPoint:TestPoint_Pad_D1.0mm | TP21 |
| 1 | GAIN_OUT | TestPoint:TestPoint_Pad_D1.0mm | TP16 |
| 1 | G_IN | TestPoint:TestPoint_Pad_D1.0mm | TP15 |
| 1 | Gain x1 (open) | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | SJ17 |
| 1 | Gain x10 | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | SJ15 |
| 1 | Gain x2 | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | SJ13 |
| 1 | Gain x20 | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | SJ16 |
| 1 | Gain x5 | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | SJ14 |
| 1 | HOST: GND CS SCLK SDO GND WAKE CMP_P CMP_N 5V_EXT GND | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J7 |
| 1 | HP_IN | TestPoint:TestPoint_Pad_D1.0mm | TP13 |
| 1 | HP_OUT | TestPoint:TestPoint_Pad_D1.0mm | TP14 |
| 1 | LP_IN | TestPoint:TestPoint_Pad_D1.0mm | TP17 |
| 1 | LP_OUT | TestPoint:TestPoint_Pad_D1.0mm | TP18 |
| 1 | Link1 cut here | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | SJ11 |
| 1 | Link2 cut here | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | SJ12 |
| 1 | Link3 cut here | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | SJ18 |
| 1 | Link4 cut here | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | SJ19 |
| 1 | OPA1642 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | Rf100k | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | SJ8 |
| 1 | Rf10M | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | SJ10 |
| 1 | Rf1M | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | SJ9 |
| 1 | Rs bypass (open) | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | SJ1 |
| 1 | SCOPE OUT SMA | Connector_Coaxial:SMA_Amphenol_132134_Vertical | J6 |
The 146 most common of 167 parts.
Questions
How big is the AFE v1 PCB?
It measures 60 × 46 mm and has 4 copper layers, 1.6 mm thick.
What parts does the AFE v1 use?
167 parts, built around the OPA2365AID, OPA1642AID, TPS7A4901DGN and BAT54C. 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 AFE v1 KiCad files?
From the auselia/afe_pcb repository on GitHub, at the commit this page was made from: the board is hw/AFE_v1.kicad_pcb and its schematic hw/AFE_v1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the AFE v1 design in my own project?
Its repository states no licence, so its author keeps all rights: ask auselia before reusing the design.
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