Support #4050
open
31/07/2025
Prepared Document about Neuromodulation and TDCS.
01/08/2025:
Completed Neuromodulation Document.
01/08/2025:
Completed Neuromodulation Document.
04/08/2025:
Presented Neuromodulation Devices (tDCS).
05-08-2025:
Referred BJT and preparing Block Diagram.
07-08-2025:
Studying Logic Gates, multiplexers.
08-08-2025:
Referring flip flops ,and their types.
13/08/2025:
studying BQ24070 charging Circuit.
14/08/2025:
Practiced how to do Soldering and Desoldering.Referred pin diagram of BQ24070.
20/08/2025: Completed SMRITI PCB board for testing.
22/08/2025: Completed testing of SMRITI including Buzzer, RGB Led, Touch Sensor, and also referred its programming Language(Embedded C).
25/08/2025: Studying relay module, its working.
studying transfer functions of filters.
26/08/2025: Doing ON/OFF Switch with Relay Module and SPST Switch.
27/08/2025: Modified SMRITI circuit and tested. Doing the PCB of Functional Generator.
09/09/2025: Studying the transform characteristics of Filters. Done the soldering of Function Generator.
11/09/2025: Studied Charging Circuit (BQ24070), its pin Configuration, and its details.
15/09/2025: Completed studying the Internal Working of Logic Gates. Now studying the Working of Instrumentation Amplifier.
16/09/2025: Continuing the Design Documentation of Anesthesia Depth Monitor.
22/09/2025: Explored ESP32 and its basic working. Just started to explore STM32 Microcontroller.
23/09/2025: Referred the types of External Components used in ESP32-C6, nRF5340,and nRF7002.
25/09/2025: Studying about nRF5340 and the types of external components used in it.
29/09/2025: Listed out the components of Power supply module, and ADS1299 separately.
06/10/2025: Studied about basics of ESP32-C6 and why this is used for wearable band. Also referred about nRF5340.
09/10/2025: Referred about ESP32 C6 and resolution, sampling rate of nRF5340. Also attended the online meeting.
13/10/2025: Done the soldering of Power supply Module. Doing the soldering of BQ24070 Charging Circuit. Done two sections of Power supply module.
14/10/2025: Doing the soldering work of Power supply module for Anesthesia Depth Analysis. Completing the third section of this board.
15/10/2025: studying the block Diagram of Smart Band and also referred the sensors (spo2 and Heart rate) used in it.
16/10/2025: Exploring the Document of Connected Health sent by Gouri. Also re-checked the components in BOM list.
21/10/2025: Checked the BOM list for components and also created the list for additional components. Also referring the block diagram of Smart band sent by Gouri.
23/10/2025: soldering PCB. Soldered two IC's (LT8362 and LT3045) and its external components. Testing of LT8362 is done.
24/10/2025: Rechecked the external components list of smart band and also created a new list for purchase of Capacitor including its manufacturer number, product link.
27/10/2025: Completed the soldering of two IC'S (LT3045 and LT3042). Doing the soldering of IC LT3093.
29/10/2025: Completed soldering of ADS1299 (ADC) Board. Now doing STM32 Microcontroller board as required by Remesh Sir. Completed soldering of external components of STM32. Only the placement of IC and chip is left to solder for STM32.
30/10/2025: Completed soldering of STM32 Microcontroller Board and testing of its IC is done and verified its voltage.
31/10/2025: completed all the PCB soldering works.
06/11/2025 : Explored the IC, LT3045 and LT3042.
The functions of these IC's and why it is used, is explored.
Also referred its datasheet to know about the output voltage across Rset.
06-11-2025: Also soldered one section of power supply board, which is IC LT3625.
10/11/2025: Rechecked the working of IC LT3045.
Checked its output voltage and also checked its continuity of output pins.
11/11/2025: Completed the soldering of IC LT3045 module.
It is done again due the change in value of one component.
17/11/2025: Learned how to do schematic layout by placing components.
Done a trial schematic layout of audio amplifier.
Just converted the schematic to PCB Layout. It is done in EasyEDA software tool.
18/11/2025: Explored the libraries of EasyEDA software tool.
Analyzed the schematic layout and started to convert into PCB using PCB tools.
19/11/2025: Explored emotive and just learned how the data is recorded from Deepu Sir.
Attended online meeting, which is about the discussions of smart band and its features.
20/11/2025: Explored DFLS260 Schotkky diode and reffered its voltage.
Also referred another similar diode with lower current (500mA)
Explored the datasheet of MAXM86161 and BMI270, to verify its power and voltage.
21/11/2025: Explored W25Q64JV datasheet for application circuit.
Doing the schematic of BMI270, MAXM86161 using Easyeda tool.
24/11/2025: Explored the datasheet of LDO voltage regulators for schematic Layout.
schematic layout of flash memory is done.
schematic Layout of 2 LDO regulators are also done using Easyeda software.
25/11/2025: Explored the schematic Layout of ESP32-C6 SOC Design.
Finished the schematic Layout of Esp32-C6 using EasyEDA tool.
Also done the schematic of external flash memory.
26/11/2025: Explored the schematic of MAX30207 (Temperature Sensor) for schematic.
Explored the datasheet of ds2484 I2C Chip for schematic.
Completed the schematic layout of MAX30207.
27/11/2025: Almosted Completed the schematic Layout for smart Band.
Adding footprint for each components in schematic Layout.
Explored the datasheets of Esp32-C6.
28/11/2025: Explored the datasheet of ESP32-C6 (QFN32 Package) for schematic.
Doing the schematic Layout of ESP32-c6, Oscillator, and its antenna connections.
01/12/2025: Doing the schematic Layout of ESP32-C6FH4. Completed its external component layout.
Started doing the schematic of USB Type C.
Also checked the datasheet of SMD Crystal Oscillator(4 pin).
02/12/2025: Explored the datasheet of Compact Battery Charger.
Done its schematic Layout and external connections.
03/12/2025: Explored about 40MHz SMD Crystal Oscillator for ESp32 SOC.
Almost completed the schematic layout of sensor sections.
Reffered the GPIO pins of ESP32-C6FH4.
04/12/2025: Explored W25Q64 flash memory datasheet.
Done the connections of communication pins of sensors and flash memory with ESP32.
Almost completed the schematic of sensors and USB Type C.
08/12/2025: Explored USB Type C pins for schematic.
Done modifications in schematic of ESP32-C6.
Explored the datasheet of flash memory and rechecked its communication pins.
10/12/2025: Done modifications in schematic layout.
Exploring flash memory pin layout for ESP32 SOC.
Completed the schematic of Oscillator.
11/12/2025: Done modifications in schematic.
Also searching a flash memory with communication pins.
Exploring the datasheet of flash memory.
15/12/2025: Done modifications in schematic Design.
Explored the various schematic design layout of Flash memory.
Explored the pin layout functions of flash memory.
16/12/2025: Completed the modifications of flash memory (W25Q64) in schematic.
Also rechecked the components in BOM with the schematic for purchase.
17/12/2025: Completed the modifications of ESP32 Soc in schematic.
Also modified the sensor circuit layouts.
18/12/2025: Almost finished the schematic layout of connected health.
Had dicussions with Remesh Sir and Gouri about the schematic layout.
Modifications of schematic also done.
22/12/2025: Explored the application circuit of SGM40567 (Battery Charger)
Rechecked the schematic of existing battery charger with the application circuit from Datasheet.
30/12/2025: Explored the datasheet of ESP32-C6.
Compared its application circuit with the design in schematic.
Researching another ESP32 module with minimum operating voltage of 2.7V
05/01/2026: Changed the Design of ESP32 C6 SOC because of input voltage range.
Explored ESP32-D0WD V3 SOC datasheet.
Started doing the design of new SOC.
06/01/2026: Explored the crystal Oscillator for internal RTC in ESP32 SOC (new schematic) as recommended by datasheet.
Exploring a I2C/I2S based display for timer.
09/01/2026: Almost completed the ESP32 V3 and flash memory schematic.
Exploring a timer display for smart band.
12/01/2026: Exploring HR and SPO2 sensor for smart band.
completed ESP32 SOC schematic.
14/01/2026: soldered two PCB Board( BLE and ADS1299) for testing.
Started exploring MAX32664 (heart rate and SPO2 sensor) Datasheet.
16/01/2026: Done Data recording and taken 6 sessions, each of 8 events.
Exploring the sensors and have to recheck with Remesh sir.
19/01/2026 : Completed the soldering of SMRITI Board.
Testing of this board have to be done.
21/01/2026: Explored Heart rate and SPO2 sensor(MAX86916).
Explored its application circuit.
Doing the schematic design of MAX86916.
27/01/2026: Changed the old Battery circuit Design, due to out of stock.
Explored new battery Circuit(BQ25176J).
Exploring its application circuit from datasheet.
03/02/2026: Almost completed the schematic of connected Health.
Have to finalise all the cicruit design and its components.
13/02/2026: Exploring multi-user wearable waistband system for real-time health monitoring of respiration, ECG, and body temperature.
A change in the Design of connected Health have to make, as required.
17/02/2026: Verifying the existing Design
Doing Design Documentation of Connected Health
Exploring Temperature Sensors.
19/02/2026: Completed the Design Document of Connected Health.
Changed the design of flash memory in schematic.
20/02/2026: Completed Design Document of Connected Health.
Completed a write up of connected Health with Block Diagrams.
24/02/2026: Started exploring nrf52840.
Tested MiMe application using Axonet with real-time data at SCT Hospital.
19/03/2026:Completed the Schematic of semsors and microcontrollers.
Preparing a document of Connected Health, including its features and implementation.
01/04/2026: Explored Round Touch LCD (Display Module) for Smart Band.
Also explored another display module of Compact size with, bluetooth connectivity of the same company (Waveshare).
Studying PCB design in EasyEDA.
Completed the Schematic of 555 Timer Circuit for studying and,
completed the PCB design of 555 timer circuit and checked its design rules.
Explored PCB, its Layers, and the terms used in it.
Doing the PCB of sensors using single layer.
08/04/2026: Doing the PCB of connected health by sections.
Doing PCB of USB and Battery Circuit.
Checked design errors.
10/04/2026: Completed the soldering of 4 channel Power Supply Board.
It includes LT3042, LT3093, Voltage Regulators (AMS1117),Charger Circuit (BQ24005) and their surrounding components.
13/04/2026: Doing the PCB work of MCU (nrf52832) and its surrounding components in EasyEDA.
Also checked its Design rules and errors.
17/04/2026: Exploring common tools like auto and manual routing, stretch Track, Slot Regions and different vias.
Doing the placement of sensors on board.
22/04/2026: Completed the placement of sensors, MCU, and Regulators on Board.
Also completed the placement of tactile SMD Switches.
Checked Design rules error.
28/04/2026: Almost completed the PCB work of Connected Health.
Doing the soldering works of 8 Channel Board. Completed its USB and Power Supply Sections.
29/04/2026: Soldering the Communication Section of 8 Channel (ESP32 MCU).
Testing of Power Supply Section is completed.
05/05/2026: Completed the soldering (power supply section, communication section) of 8 Channel EEG Board.
Now Testing of board is to be completed.
07/05/2026: Preparing the Test Procedures of 8 Channel EEG Board.
It includes Power supply section, Frequency Test, Noise Test, Connection test, EEG Test, and Data Transfer Test.
11/05/2026: Completed the Test Procedure (all test) of 8 Channel EEG Document.
Next, an Excel sheet incuding the status of all the test have to be prepared.
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