# Pluto X v1.1 EEG BCI ## Description Welcome to your new project. Imagine what you can build here. ## Project Details - **Owner:** dsp007 - **Created:** 4/6/2026 - **Last Updated:** 4/7/2026 - **Visibility:** Public - **System Architecture:** flowchart TD BAT["LiPo Battery"] --> CHG["TP4056 Charger"] CHG --> SW["SPDT Power Switch"] SW --> BST["MT3608 Boost to 5V"] BST --> BUS5["5V Bus"] BUS5 --> LDOA["LM1117 3.3V Analog"] BUS5 --> LDOD["LM1117 3.3V Digital"] BUS5 --> CP["ICL7660 Inverter -5V"] LDOA --> AVDD["AVDD 3.3V"] LDOD --> DVDD["DVDD 3.3V"] CP --> AVSS["AVSS -5V"] subgraph ANA [Analog EEG Front End] ELEC["Electrode Connectors"] --> FILT["RC Filters 2.2k and 1nF"] FILT --> ADC["ADS1299 6ch EEG AFE"] REF["REF Connector"] --> ADC BIAS["BIAS Connector"] --> ADC end subgraph DIG [Digital Control] MCU["ESP32 WROOM 32"] end AVDD --> ADC AVSS --> ADC DVDD --> MCU DVDD --> ADC MCU -->|SPI and Control| ADC AGND["AGND"] --> STAR["STAR GND"] DGND["DGND"] --> STAR ## Key Components ### J1 — [JST B2B PH K 01x02 Connector](https://www.flux.ai/jharwinbarrozo/jst-b2b-ph-k-01x02-connector~zu5.md) - Connector Type: JST-PH - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Manufacturer Name: JST Sales America - Role Details: 2-pin JST-PH input for single-cell LiPo battery - Connector Rows: 1 - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Role: Battery Connector - Part Type: Connector - Connector Pitch: 2.0mm - Package: THT - Connector Positions: 2 **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J2 — [Pin Header 01x10 2.54mm Vertical](https://www.flux.ai/vasy_skral/pin-header-01x10-254mm-vertical~1nl.md) - Connector Positions: 10 - Part Type: Connector - Role Details: Electrode breakout header carrying FP1 FP2 Oz O1 O2 POz REF BIAS and spare grounds - Connector Type: Pin Header - Role: Electrode Connector - Connector Rows: 1 - Package: THT - Connector Pitch: 2.54mm **Pins:** - Pin_1 [pin 1] - Pin_10 [pin 10] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] - Pin_9 [pin 9] ### U1 — [ESP32-WROOM-32E](https://www.flux.ai/vasyl/esp32-wroom-32e~epi.md) - Part Type: Integrated Circuit - Role Details: ESP32 digital controller and wireless link for Pluto X v1.1 EEG BCI - Package: Module - Manufacturer Part Number: ESP32-WROOM-32 - Manufacturer Name: Espressif Systems - Role: MCU - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32_datasheet_en.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - EN [pin 3] - GND [pin 38] - GND [pin 39] - GND [pin 15] - GND [pin 1] - IO0 [pin 25] - IO12 [pin 14] - IO13 [pin 16] - IO14 [pin 13] - IO15 [pin 23] - IO16 [pin 27] - IO17 [pin 28] - IO18 [pin 30] - IO19 [pin 31] - IO2 [pin 24] - IO21 [pin 33] - IO22 [pin 36] - IO23 [pin 37] - IO25 [pin 10] - IO26 [pin 11] - IO27 [pin 12] - IO32 [pin 8] - IO33 [pin 9] - IO34 [pin 6] - IO35 [pin 7] - IO4 [pin 26] - IO5 [pin 29] - NC [pin 32] - RXD0/IO3 [pin 34] - SCK/CLK [pin 20] - SCS/CMD [pin 19] - SDI/SD1 [pin 22] - SDO/SD0 [pin 21] - SENSOR_VN [pin 5] - SENSOR_VP [pin 4] - SHD/SD2 [pin 17] - SWP/SD3 [pin 18] - TXD0/IO1 [pin 35] - VDD [pin 2] ### U2 — [ADS1299-6PAG](https://www.flux.ai/adrian95/ads1299-6pag~r9i.md) - Datasheet URL: https://www.ti.com/lit/ds/symlink/ads1299.pdf - Role: AFE - Manufacturer Part Number: ADS1299-6PAG - Role Details: EEG analog front-end ADC with SPI interface and bias/reference functions - License: https://creativecommons.org/licenses/by/4.0/ - Package: TQFP-64 - Part Type: Integrated Circuit - Manufacturer Name: Texas Instruments **Pins:** - ~CS [pin 39] - ~DRDY [pin 47] - ~PWDN [pin 35] - ~RESET [pin 36] - AVDD_1 [pin 19] - AVDD_2 [pin 21] - AVDD_3 [pin 22] - AVDD_4 [pin 56] - AVDD_5 [pin 59] - AVDD1 [pin 54] - AVSS_1 [pin 20] - AVSS_2 [pin 23] - AVSS_3 [pin 32] - AVSS_4 [pin 57] - AVSS_5 [pin 58] - AVSS1 [pin 53] - BIASIN [pin 62] - BIASINV [pin 61] - BIASOUT [pin 63] - BIASREF [pin 60] - CLK [pin 37] - CLKSEL [pin 52] - DAISY_IN [pin 41] - DGND_1 [pin 33] - DGND_2 [pin 49] - DGND_3 [pin 51] - DIN [pin 34] - DOUT [pin 43] - DVDD_1 [pin 48] - DVDD_2 [pin 50] - GPIO1 [pin 42] - GPIO2 [pin 44] - GPIO3 [pin 45] - GPIO4 [pin 46] - IN1N [pin 15] - IN1P [pin 16] - IN2N [pin 13] - IN2P [pin 14] - IN3N [pin 11] - IN3P [pin 12] - IN4N [pin 9] - IN4P [pin 10] - IN5N [pin 7] - IN5P [pin 8] - IN6N [pin 5] - IN6P [pin 6] - IN7N [pin 3] - IN7P [pin 4] - IN8N [pin 1] - IN8P [pin 2] - NC_1 [pin 27] - NC_2 [pin 29] - RESERVED [pin 64] - RESV1 [pin 31] - SCLK [pin 40] - SRB1 [pin 17] - SRB2 [pin 18] - START [pin 38] - VCAP1 [pin 28] - VCAP2 [pin 30] - VCAP3 [pin 55] - VCAP4 [pin 26] - VREFN [pin 25] - VREFP [pin 24] ### U3 — [TP4056](https://www.flux.ai/lcsc/tp4056~5yzc.md) - Role: Battery Charger - Role Details: Charges the single-cell LiPo battery from 5V input - Package or Case Code: ESOP-8_L4.9-W3.9-P1.27-LS6.0-BL-EP - Part Type: Battery Management ICs - JLCPCB Part Class: Extended Part - Manufacturer Part Number: TP4056 - Product Info Url: https://lcsc.com/product-detail/PMIC-Battery-Management_UMW-Youtai-Semiconductor-Co-Ltd-TP4056_C725790.html - Manufacturer Name: UMW(友台半导体) - LCSC Part Number: C725790 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409241408_UMW-Youtai-Semiconductor-Co---Ltd--TP4056_C725790.pdf - Package: ESOP-8 **Pins:** - ~{CHRG} [pin 7] - ~{STDBY} [pin 6] - BAT [pin 5] - CE [pin 8] - EP [pin 9] - GND [pin 3] - PROG [pin 2] - TEMP [pin 1] - VCC [pin 4] ### U4 — [ICL7660ESA+T](https://www.flux.ai/lcsc/icl7660esaplust~pru8.md) - Part Type: DC-DC Converters - Manufacturer Name: ADI(亚德诺)/MAXIM(美信) - JLCPCB Part Class: Extended Part - LCSC Part Number: C407899 - Role Details: Inverts +5V bus to create AVSS negative analog rail - Product Info Url: https://lcsc.com/product-detail/New-Quadratic-Unclassified-Data_Maxim-Integrated-ICL7660ESA-T_C407899.html - Manufacturer Part Number: ICL7660ESA+T - Role: Charge Pump - Package: SO-8 - Package or Case Code: SO-8_L4.9-W3.9-P1.27-LS5.9-BL - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Analog-Devices-Inc--Maxim-Integrated-ICL7660ESA-T_C407899.pdf **Pins:** - (N.C.)BOOST [pin 1] - CAP- [pin 4] - CAP+ [pin 2] - GND [pin 3] - LV [pin 6] - OSC [pin 7] - V+ [pin 8] - VOUT [pin 5] ### U5 — [LM1117MPX-3.3-NOPB](https://www.flux.ai/adrian95/lm1117mpx-33-nopb~mrw.md) - License: https://creativecommons.org/licenses/by/4.0/ - Package: SOT-223-4 - Part Type: Integrated Circuit - Datasheet URL: http://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=http%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Flm1117 - Role Details: Analog 3.3V regulator generating AVDD for ADS1299 - Manufacturer Part Number: LM1117MPX-3.3/NOPB - Role: LDO - Manufacturer Name: Texas Instruments **Pins:** - GND [pin 1] - VI [pin 3] - VO [pin 2] - VO [pin 4] ### U6 — [LM1117MPX-3.3-NOPB](https://www.flux.ai/adrian95/lm1117mpx-33-nopb~mrw.md) - Manufacturer Part Number: LM1117MPX-3.3/NOPB - Datasheet URL: http://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=http%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Flm1117 - Manufacturer Name: Texas Instruments - Role Details: Digital 3.3V regulator generating DVDD for ESP32 and ADS1299 digital supply - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Package: SOT-223-4 - Role: LDO **Pins:** - GND [pin 1] - VI [pin 3] - VO [pin 2] - VO [pin 4] ### U7 — [MT3608](https://www.flux.ai/jharwinbarrozo/mt3608~nbp.md) - Part Type: Integrated Circuit - Manufacturer Part Number: MT3608 - Role Details: Boost converter generating +5V bus from LiPo battery after the main switch - Package: SOT-23-6 - Integrated Circuit Type: Boost Converter - Role: Boost Converter - Manufacturer Name: Aerosemi - Datasheet URL: https://datasheet.octopart.com/MT3608-Aerosemi-datasheet-138895667.pdf **Pins:** - EN [pin 4] - FB [pin 3] - GND [pin 2] - IN [pin 5] - NC [pin 6] - SW [pin 1] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/dsp007/pluto-x-v1p1-eeg-bci~ae](https://www.flux.ai/dsp007/pluto-x-v1p1-eeg-bci~ae).* --- *Generated from [https://www.flux.ai/dsp007/pluto-x-v1p1-eeg-bci~ae](https://www.flux.ai/dsp007/pluto-x-v1p1-eeg-bci~ae)*