EEG32
About the EEG32 PCB
EEG32 is an open source Nordic nRF PCB design by Iwetter, published on GitHub. It is a 4-layer board measuring 68.3 × 55.7 mm, with 215 components from 32 distinct parts.
Its main chip is the NRF52832-QFAA-R, from the Nordic nRF family. Other key parts include the S-1318D33-A4T2U4, XC9140A501MR-G and ADS1299IPAG. By type, the board carries 133 capacitors, 63 resistors, 7 ICs, 5 inductors, 3 connectors and 2 crystals.
From the project
32-channel ADS1299/nRF52832 acquisition board design in KiCad, with schematics, PCB layout, BOM, and pre-fabrication documentation. Bench tests pending.
A 32-channel EEG acquisition board design in KiCad.
An electronics design project using four ADS1299 analog front ends and an nRF52832 acquisition controller, with shared reference, separate bias, passive inputs, and documented connector/assembly interfaces.
The repository captures the 2.1-prefab-bench design checkpoint dated October 1, 2026. It contains editable schematics and PCB layout, component libraries, a BOM, and pre-fabrication engineering documentation. Fabrication, bench performance, and human-connected use have not been validated. The design documentation retains the outstanding…
Main components on the EEG32
EEG32 bill of materials (BOM)
215 components, 32 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | NRF52832-QFAA-R Nordic Semiconductor | NRF52832-QFAA-R7 | U1 |
| 1 | S-1318D33-A4T2U4 ABLIC | S-1318_A4T2U4 | U2 |
| 1 | XC9140A501MR-G Torex | FP-DBV0005A-IPC_C | U3 |
| 4 | ADS1299IPAG Texas Instruments | PAG0064A_L | U101, U201, U301, U401 |
| 1 | ECS-.327-12.5-12-TR ECS | FP-ECX-12-MFG | X1 |
| 1 | ECS-320-8-37CKM 32MHz CL=8pF ECS | FP-ECX-1637-MFG | X2 |
| 1 | 503480-4000 Molex | Molex_503480-4000_1x40_P0.50mm_Horizontal | J601 |
| 2 | NOT PURCHASED Header 2 PCB feature | HDR1X2 | P1, P2 |
| 1 | 2450AT18B100E 2450AT18B100 Johanson Technology | 2450AT18B100 | E1 |
| 1 | 2450FM07A0029T 2450FM07A0029 Johanson Technology | 2450FM07A0029 | F1 |
| 1 | LQW15AN2N7G8ZD 0.0027uH Murata | L0402 | L1 |
| 1 | LQG15HS15NJ02D 15nH Murata | L0402 | L2 |
| 1 | LQM18DN100M70L 10uH Murata | L0603 | L3 |
| 1 | CW100505-3N9J 0.0039uH Bourns | L0402 | L4 |
| 1 | LQM18PN4R7MFRL 4.7uH Murata | L0603 | L5 |
| 2 | GJM1555C1H200FB01D 20pF Murata | C0402 | C1, C2 |
| 2 | 04025U120FAT2A 12pF KYOCERA AVX | C0402 | C3, C4 |
| 2 | MSAST105SB5104KFNA01 100nF Taiyo Yuden | C0402 | C5, C9 |
| 1 | CC0402FRNPO9BN101 100pF Yageo | C0402 | C6 |
| 1 | GCQ1555C1H1R0BB01D 1pF Murata | C0402 | C7 |
Show 12 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | GRM188R61A105KA61D 1uF Murata | C0603 | C8 |
| 1 | GRM155R60J475ME87D 4.7uF Murata | C0402 | C10 |
| 38 | GRM155R71C104KA88D 100nF Murata | C0402 | C11, C15, C105, C107, C109, C111, C112, C114 +30 |
| 3 | GRM155R61A106ME11D 10uF Murata | C0402 | C12, C13, C14 |
| 4 | T491B107K006AT 100uF 6.3V TANT KEMET | CP_EIA-3528-21_Kemet-B | C101, C201, C301, C401 |
| 40 | GRM155R61A105KE15D 1uF Murata | C0402 | C102, C104, C106, C108, C110, C115, C116, C117 +32 |
| 1 | GRM1555C1H102JA01D 1nF Murata | C0402 | C103 |
| 4 | GRM188R61A106KE69D 10uF Murata | C0603 | C113, C213, C313, C413 |
| 33 | GRM1885C1H472JA01D 4.7nF 5% C0G 50V Murata | C0603 | C601, C602, C603, C604, C605, C606, C607, C608 +25 |
| 28 | RC0402FR-0710KL 10k Yageo | R0402 | R10, R11, R12, R13, R102, R103, R104, R105 +20 |
| 1 | RC0402FR-071ML 1M Yageo | R0402 | R101 |
| 34 | RC0402FR-074K99L 4.99k 1% Yageo | R0402 | R601, R602, R603, R604, R605, R606, R607, R608 +26 |
EEG32 design files
The KiCad project lives in the Iwetter/EEG32 repository on GitHub; these links point at the commit this page was built from.
- LayoutEEG32.kicad_pcb
- SchematicEEG32.kicad_sch
- BOMBOM.csv
EEG32: common questions
What microcontroller does the EEG32 use?
The EEG32 is built around the NRF52832-QFAA-R, from the Nordic nRF family.
How big is the EEG32 PCB?
The EEG32 measures 68.3 × 55.7 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the EEG32?
215 components, from 32 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the EEG32 design files?
From the Iwetter/EEG32 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the EEG32 design in my own project?
The repository has no license, so all rights stay with Iwetter. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the EEG32 without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Nordic nRF firmware against it before you order a PCB.
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