2 layers112 × 202 mm
RIAA
leicht-io/BeoGram-4002-RIAA
Open-source RIAA phono preamp for the Bang & Olufsen BeoGram 4002/4004 turntable (KiCad)
63 parts5CERN-OHL-S-2.0
4 layers87.1 × 40.4 mm
BowelProbe
ashertok1/BowelProbe- Size
- 87.1 × 40.4 mm
- Copper layers
- 4
- Thickness
- 1.7 mm
- Parts
- 135
- Nets
- 70
- Pads
- 344
- Tracks, vias
- 685, 155
- Pours
- 128
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 12 Jan 2026
- Updated
- 9 Jul 2026
Overview
BowelProbe is an open-source printed circuit board by ashertok1, from the ashertok1/BowelProbe repository on GitHub. It is a 4-layer board of 87.1 × 40.4 mm with 135 parts on 70 nets, routed with 685 tracks and 155 vias.
It is built around the ATMEGA328-PU, TL072ACDRE4 and MCP6002T-E/MC, with the OPA2134UA/2K5, AD9833BRMZ and SN74LVC1G86DBVR-TP among its other parts. Its parts include 52 capacitors, 25 resistors, 17 connectors, 12 ICs and 5 diodes. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
10
ATMEGA328-PU
PDIP-28-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH PDIP-28 Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
TL072ACDRE4
SOIC-8-20V~-2.25V、2.25V~20V 0℃~+70℃ 1.4mA 100dB 100pA 18uV/℃ 2 200pA 20V/us 26mA 37nV/√Hz@1kHz 4.5V~40V 5.25MHz 6mV Short-Circuit Protection、EMI filtering/RF suppression SOIC-8 FET Input Amplifiers ROHSTexas InstrumentsFET InputAmplifiers
MCP6002T-E/MC
DFN-8-EP(2x3)-40℃~+125℃ 1.8V~6V 100uA 1MHz 1pA 1pA 2 23mA 28nV/√Hz@1kHz 2uV/℃ 4.5mV 600V/ms 76dB Rail-to-Rail Input, Rail-to-Rail Output DFN-8-EP(2x3) Operational Amplifier ROHSMicrochip TechnologyOperational AmplifierOPA2134UA/2K5
SOIC-8-18V~-2.5V、2.5V~18V -40℃~+85℃ 0.00008% 106dB 2-Channel 5mA SOIC-8 Audio Amplifiers ROHSTexas InstrumentsAudio Amplifiers
AD9833BRMZ
MSOP-10-40℃~+105℃ 10 12.5MHz 1LSB 2.3V~5.5V 25MHz 28 60dB Integrated modulator、Phase continuous switching、Low-power mode、Enable/shutdown function SPI Voltage MSOP-10 Direct Digital Synthesis (DDS) ROHSAnalog DevicesDirect Digital Synthesis (DDS)
SN74LVC1G86DBVR-TP
SOT-23-5-40℃~+125℃ 1 1.2V、1.9V、2.3V、2.4V、3.8V 1.65V~5.5V 10uA 2 300mV、400mV、450mV、550mV 32mA 32mA 4ns@3.3V,50pF 74LVC XOR Gate SOT-23-5 Logic Gates ROHSTECH PUBLICLogic Gates
TLV76050DBZR-MS
SOT-23SOT-23 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMSKSEMIUncategorisedAO3407A
SOT-231 P-Channel 1.4W 1.8V 14.3nC@4.5V 30V 37mΩ@10V、52mΩ@4.5V 4.2A 700pF 75pF SOT-23 MOSFETs ROHSUMWMOSFETs
BZT52B12
SOD-123Zener DiodeshongjiachengSRF0703-4R7M
SMD-4P,7.6x7.6mm3.09A 3.78A 4.7uH 40.6mΩ ±20% SMD-4P,7.6x7.6mm Power Inductors ROHSBournsPower Inductors
Parts
135| Qty | Value | Footprint | References |
|---|---|---|---|
| 28 | 0.1u | BowelProbe:Cap0.1uF | C3, C10, C11, C12, C13, C14, C15, C22, C23, C24, C27, C28, C33, C34, C37, C38 +12 |
| 14 | Conn_01x01 | BowelProbe:CT3149-0 | A1, A2, A3, D2, D5, D6, D7, D8, D9, J17, RX, SCL, SDA, TX |
| 13 | 10u | BowelProbe:Cap10uF | C21, C25, C26, C29, C32, C35, C36, C39, C41, C44, C46, C47, C51 |
| 13 | Conn_01x01 | BowelProbe:CT3149-2 | J18, J19, J20, J21, J22, J23, J24, J27, J28, J29, J30, J31, J32 |
| 9 | 10k | BowelProbe:Resistor10k | R1, R2, R3, R4, R5, R10, R14, R22, R23 |
| 4 | 1u | BowelProbe:Cap1uF | C1, C2, C16, C18 |
| 4 | 47 | BowelProbe:Resistor47 | R6, R7, R8, R9 |
| 3 | 30k | BowelProbe:Resistor30k | R17, R24, R25 |
| 2 | 18p | BowelProbe:Cap18pF | C4, C6 |
| 2 | 4.7u | BowelProbe:Cap4.7uF | C17, C20 |
| 2 | 6.8k | BowelProbe:Resistor6.8k | R15, R16 |
| 2 | Conn_01x01 | BowelProbe:CT3149-5 | J25, J26 |
| 2 | Conn_01x08 | BowelProbe:microSD | J1, J2 |
| 2 | DiodeClamper | BowelProbe:DiodeClamper | D4, D5 |
| 2 | TL072ACDR | BowelProbe:TL072smd | U6, U8 |
| 1 | 1.8k | BowelProbe:Resistor1.8k | R18 |
| 1 | 100 | BowelProbe:Resistor100 | R19 |
| 1 | 100k | BowelProbe:Resistor100k | R11 |
| 1 | 10u | BowelProbe:Inductor10uH | L1 |
| 1 | 1M | BowelProbe:Resistor1M | R13 |
| 1 | 1k | BowelProbe:Resistor1k | R21 |
| 1 | 1n | BowelProbe:Cap1nF | C31 |
| 1 | 2.2n | BowelProbe:Cap2.2nF | C30 |
| 1 | 300k | BowelProbe:Resistor300k | R20 |
| 1 | 4.7p | BowelProbe:Cap4.7pF | C19 |
| 1 | 71.5k | BowelProbe:Resistor71.5k | R12 |
| 1 | AD9833BRMZ | BowelProbe:AD9833 | U5 |
| 1 | AO3407A | BowelProbe:AO3407A | Q1 |
| 1 | ATmega328P | BowelProbe:ATmega328P | U1 |
| 1 | BZT52B12 | BowelProbe:BZT52B12 | D1 |
| 1 | Buffer | BowelProbe:Buffer | U12 |
| 1 | Conn_02x03_Odd_Even | BowelProbe:Dupont2x3 | ICSP |
| 1 | DiodeLowLeak | BowelProbe:DiodeLowLeak | D3 |
| 1 | LM319MX/NOPB | BowelProbe:LM319MX_NOPB | U10 |
| 1 | LM3480IM3-12/NOPB | BowelProbe:LM3480IM3-12_NOPB | U2 |
| 1 | LOGO | LOGO | G*** |
| 1 | LT8330 | BowelProbe:LT8330 | U4 |
| 1 | MCP6002T-E/MC | BowelProbe:MCP6002smd | U9 |
| 1 | OPA2134UA/2K5 | BowelProbe:OPA2134smd | U7 |
| 1 | SN74LVC1G86DBVR | BowelProbe:SN74LVC1G86DBVR | U11 |
| 1 | SRF0703-4R7M | BowelProbe:Inductor4.7uReplacement | L2 |
| 1 | SchottkyDiode | BowelProbe:SchottkyReplacement | D2 |
| 1 | TLV76050DBZR | BowelProbe:TLV76050DBZR | U3 |
| 1 | TSX-3225 16.0000MF18X-AC3 | BowelProbe:Crystal16MHz | XTAL1 |
The 131 most common of 135 parts.
Questions
How big is the BowelProbe PCB?
It measures 87.1 × 40.4 mm and has 4 copper layers, 1.7 mm thick.
What parts does the BowelProbe use?
135 parts, built around the ATMEGA328-PU, TL072ACDRE4, MCP6002T-E/MC and OPA2134UA/2K5. 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 BowelProbe KiCad files?
From the ashertok1/BowelProbe repository on GitHub, at the commit this page was made from: the board is bowelProbe.kicad_pcb and its schematic bowelProbe.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the BowelProbe design in my own project?
Its repository states no licence, so its author keeps all rights: ask ashertok1 before reusing the design.
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