2 layers39.9 × 50.5 mm
4 layers71.8 × 40.5 mm
Bioamplifier
RauLLorenzon/DIY_EEG48 Channel EEG board, based on the ADS1299
- Size
- 71.8 × 40.5 mm
- Copper layers
- 4
- Thickness
- 1.5 mm
- Parts
- 95
- Nets
- 96
- Pads
- 339
- Tracks, vias
- 660, 56
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 25 Mar 2024
- Updated
- 19 May 2026
Overview
Bioamplifier is an open-source printed circuit board by RauLLorenzon, from the RauLLorenzon/DIY_EEG repository on GitHub. It is a 4-layer board of 71.8 × 40.5 mm with 95 parts on 96 nets, routed with 660 tracks and 56 vias.
It is built around the LM2665M6, TPD4E1B06DCKR-TP and ADS1299IPAG, with the TPS72325DBV, TPS73133DBV and EXB-V8V512JV among its other parts. Its parts include 46 capacitors, 19 resistors, 11 ICs, 5 connectors and 2 diodes.
Main components
7
LM2665M6
SOT-23-6-40℃~+85℃@(TJ) 1 2.5V~5.5V 40mA 650uA 80kHz Boost Built-in Fixed No SOT-23-6 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
TPD4E1B06DCKR-TP
SOT-3630.6pF 14.5V 5.5V 9.5V 900pA Bidirectional ESD Four channels IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 SOT-363 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
ADS1299IPAG
TQFP-64(10x10)-40℃~+85℃ 121dB 24 3ppm/℃ 4.75V~5.25V TQFP-64(10x10) Analog Front End (AFE) ROHSTexas InstrumentsAnalog Front End (AFE)
TPS72325DBV
SOT-23-5-40℃~+125℃ 1 2.5V 2.7V 200mA 48dB@(10kHz)、65dB@(1kHz) 500mV@(200mA) 60uVrms Fixed Negative Over Current Protection、Over Temperature Protection、Enable SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsTPS73133DBV
SOT-23-5-40℃~+125℃@(Tj) 1 100mV@(150mA) 150mA 3.3V 30uVrms 400uA 5.5V 58dB@(100Hz) Fixed Over Current Protection、Enable、Thermal Shutdown Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
EXB-V8V512JV
0603x45.1kΩ ±5% 0603x4 Resistor Networks, Arrays ROHSPanasonicResistor Networks & Arrays
HSMH-H170
0805-40℃~+85℃ 170° 2.1V 20mA 639nm 65mW 660nm 7.2mcd Discrete Diode Red Red Lens 0805 LED Indication - Discrete ROHSBroadcom LimitedLED Indication - Discrete
README
Hardware/README.md1st batch
Parts
95| Qty | Value | Footprint | References |
|---|---|---|---|
| 19 | 1 nF | Capacitor_SMD:C_0402_1005Metric | C11, C12, C13, C14, C15, C16, C17, C18, C26, C28, C31, C32, C33, C34, C35, C36 +3 |
| 12 | 50 Ω | Resistor_SMD:R_0402_1005Metric | R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14 |
| 7 | 1 uF | Capacitor_SMD:C_0402_1005Metric | C1, C6, C19, C21, C22, C23, C24 |
| 6 | TPD4E1B06DCKR | TPD4E1B06_R:DCK6_TEX | U2, U3, U4, U5, U9, U10 |
| 5 | 0.1 uF | Capacitor_SMD:C_0402_1005Metric | C2, C4, C7, C20, C25 |
| 5 | Fiducial | Fiducial:Fiducial_1mm_Mask3mm | FID1, FID2, FID3, FID4, FID5 |
| 4 | 4.99 KΩ | Resistor_SMD:R_0603_1608Metric | R2, R18, R20, R22 |
| 4 | EXB-V8V512JV | Resistor_SMD:R_Array_Convex_4x0603 | RN1, RN2, RN3, RN4 |
| 3 | 0.1 nF | Capacitor_SMD:C_0603_1608Metric | C27, C29, C41 |
| 3 | 1 uF | Capacitor_SMD:C_0603_1608Metric | C3, C8, C10 |
| 3 | MountingHole | MountingHole:MountingHole_2mm | H1, H2, H3 |
| 2 | 10 uF | Capacitor_SMD:C_0402_1005Metric | C45, C46 |
| 2 | 2.2 nF | Capacitor_SMD:C_0603_1608Metric | C42, C43 |
| 2 | Conn_01x07_Socket | Connector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_Vertical | J1, J3 |
| 2 | Jumper | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J4, J5 |
| 1 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C40 |
| 1 | 1 KΩ | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 1 MΩ | Resistor_SMD:R_0603_1608Metric | R17 |
| 1 | 1.5 nF | Capacitor_SMD:C_0402_1005Metric | C30 |
| 1 | 10 nF | Capacitor_SMD:C_0402_1005Metric | C44 |
| 1 | 10 uF | Capacitor_SMD:C_0805_2012Metric | C5 |
| 1 | 100 uF | Capacitor_SMD:C_0805_2012Metric | C9 |
| 1 | 180 Ω | Resistor_SMD:R_0603_1608Metric | R15 |
| 1 | ADS1299IPAG | ads1299 8channel:PAG64_TEX | U1 |
| 1 | Conn_01x26_Pin | Connector_PinHeader_2.54mm:PinHeader_2x13_P2.54mm_Horizontal | J2 |
| 1 | HSMH-H170 | LED_SMD:LED_0805_2012Metric | D2 |
| 1 | LB QH9G-N1OO-35-1 | LED_SMD:LED_0402_1005Metric | D1 |
| 1 | LM2665M6 | Package_TO_SOT_SMD:SOT-23-6 | U11 |
| 1 | TLV70310DBVR | tlv702:DBV0005A-IPC_A | U8 |
| 1 | TPS72325DBV | Package_TO_SOT_SMD:SOT-23-5 | U7 |
| 1 | TPS73133DBV | Package_TO_SOT_SMD:SOT-23-5 | U6 |
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Questions
How big is the Bioamplifier PCB?
It measures 71.8 × 40.5 mm and has 4 copper layers, 1.5 mm thick.
What parts does the Bioamplifier use?
95 parts, built around the LM2665M6, TPD4E1B06DCKR-TP, ADS1299IPAG and TPS72325DBV. 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 Bioamplifier KiCad files?
From the RauLLorenzon/DIY_EEG repository on GitHub, at the commit this page was made from: the board is Hardware/bioamplifier.kicad_pcb and its schematic Hardware/Electrodes input.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Bioamplifier design in my own project?
Its repository states no licence, so its author keeps all rights: ask RauLLorenzon before reusing the design.