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FreeEEG32

neuroidss·FreeEEG32-alpha1.0·KiCad/FreeEEG32.kicad_pcb

FreeEEG32 PCB layout, top view — open source ESP8266 board by neuroidss
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About the FreeEEG32 PCB

FreeEEG32 is an open source ESP8266 PCB design by neuroidss, published on GitHub under the AGPL-3.0 license. It is a 4-layer board measuring 69.8 × 69.8 mm, with 213 components from 38 distinct parts.

Its main chip is the ESP-12F, from the ESP8266 family. Other key parts include the ADP7118AUJZ-3.3, 8.192MHz, TPD4E1B06, SN6505A and ADR4525. By type, the board carries 147 capacitors, 41 ICs, 9 connectors, 6 resistors, 4 switches and 3 diodes.

It belongs with the iot & wireless and usb & debug tools designs in this gallery.

From the project

ALPHA1.0 TEST FAILED, USE NEW VERSION INSTEAD FreeEEG32 alpha1.0 32 channels mobile electroencephalography under GNU AGPL 24 bits, 4kSPS ADCs 4x AD7770 MCU STM32F427ZI WIFI ESP-12F (ESP8266) USB CP2102N Accel & hyro LSM6DS3TR Isolated SPI, UART, USB, power

FreeEEG32, from the project README
From the project README

Main components on the FreeEEG32

ADP7118AUJZ-3.38.192MHzTPD4E1B06ESP-12FSN6505AADR4525LSM6DS3AD7770TLV73333PDBVTADUM1402BRWZISO7341c_spiSTM32F427ZI_4side_shortCP2102N-A01-GQFN24473521001

FreeEEG32 bill of materials (BOM)

213 components, 38 distinct parts.

QtyPartRefs
3
ADP7118AUJZ-3.3
U1, U2, U39
1
8.192MHz
U3
20
TPD4E1B06
U4, U8, U9, U10, U11, U15, U16, U17 +12
1
ESP-12F
U5
1
SN6505A
U6
4
ADR4525
U7, U14, U21, U28
1
LSM6DS3
U12
4
AD7770
U13, U20, U27, U34
1
TLV73333PDBVT
U19
1
ADUM1402BRWZ
U35
1
ISO7341c_spi
U36
1
STM32F427ZI_4side_short
U37
1
CP2102N-A01-GQFN24
U40
1
473521001
U43
1
32768Hz
Y1
1
8MHz
Y2
1
CONN_01X02
J1
4
CONN_02X10
P1, P2, P3, P4
2
CONN_02X03
P6, P7
1
USB_B
P8
Show 18 more
QtyPartRefs
1
CONN_01X03
P11
1
NRST
SW1
1
BOOT0
SW2
1
BOOT0
SW3
1
BOOT_WIFI
SW4
1
da2303
T1
2
D_Schottky_SMD
D1, D2
1
SP0503BAHTG
D3
83
100n
C1, C5, C6, C7, C8, C9, C10, C11 +75
39
1u
C2, C12, C13, C14, C15, C25, C29, C30 +31
2
CL1
C3, C129
2
CL2
C4, C131
8
2.2u
C102, C117, C119, C120, C121, C122, C123, C124
3
4.7u
C106, C111, C112
6
10u
C113, C114, C132, C136, C140, C144
4
22u
C135, C139, C143, C147
1
R_EXT
R1
5
47k
R2, R3, R4, R5, R6

FreeEEG32 design files

The KiCad project lives in the neuroidss/FreeEEG32-alpha1.0 repository on GitHub; these links point at the commit this page was built from.

FreeEEG32: common questions

What microcontroller does the FreeEEG32 use?

The FreeEEG32 is built around the ESP-12F, from the ESP8266 family.

How big is the FreeEEG32 PCB?

The FreeEEG32 measures 69.8 × 69.8 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the FreeEEG32?

213 components, from 38 distinct parts. The full bill of materials is listed on this page.

Where can I download the FreeEEG32 design files?

From the neuroidss/FreeEEG32-alpha1.0 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the FreeEEG32 design in my own project?

Yes, under the terms of its AGPL-3.0 license, which neuroidss chose for the repository.

Can I test firmware for the FreeEEG32 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP8266 firmware against it before you order a PCB.

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