Project Description Update

0:20

Considering project cloning options.

This looks like a battery management system controller board: a central control board for monitoring and managing a battery system, handling system control logic, communications, status/logging, and user interaction. The right way to explain a project like this is to focus on the whole-device function, power architecture, subsystems, and signal flow

You can use this project in a few practical ways:

As a reference design to understand how a battery-system controller is organized
As a starting point for your own battery monitoring/control product
To study subsystem partitioning, like control, comms, UI, storage, and external outputs
To adapt it into your own version with different I/O, battery count, enclosure, or firmware

Since this project is not editable from your current access, the most practical next step is to clone it into your own workspace and modify the copy. Flux’s project search/workflow guidance supports using projects as references and then searching or adapting them further in your own work

Here’s a ready link to clone it into your account:

Clone this project

If you want, I can also give you either:

a 1-minute functional walkthrough, or
a subsystem-by-subsystem explanation of this design.

Give subsystem breakdown

1-minute walkthrough

Trace U20 connections

Show project usage

22 days

Manufacturer Part Number

AMS1117-3.3

RED_LED

CAN_L

SW2OUTPUT

EXT_IO_A

RELAY4_SSR

RELAY1

CAN_H

IO33

I2C_SCK

I2C_SDA

IO34_INPUT

SSR4_4

RESET

VSPI_CLK

TOUCH_CS

IO17

EXT_IO_C

BLUE_LED

MODULE_TX1

VSPI_MISO

TOUCH_IRQ

SSR3_3

SSR4_3

IO35_INPUT

CAN_L

HSPI_MOSI

IO22

CAN_H

TCA6416A_INTB

IO34_INPUT

EXT_IO_D

IO32

EXT_IO_D

IO39_INPUT

I2C_SCK

RELAY2

IO16

IO17

DISPLAY_CS

SSR3_4

RELAY3_SSR

IO36_INPUT

RELAY3_SSR

I2C_SCK

VSPI_CLK

IO26

HSPI_MISO

IO27

DISPLAY_CS

RS485_ENABLE

RS485_RX

RS485_TX

IO26

IO0_BOOT

IO21

HSPI_MISO

SD_CS

IO33

IO32

IO15

IO33

EXT_IO_C

IO39_INPUT

RS485_RX

IO2

I2C_SDA

VSPI_MISO

DISPLAY_DC

RELAY2

HSPI_MOSI

IO4

TOUCH_CS

IO36_INPUT

AVRISP_RESET

EXT_IO_B

IO5

IO2

SSR3_3

SSR4_4

IO25

VSPI_CLK

SW1EXT

IO4

CANBUS_RX

VSPI_MISO

CAN_H

IO35_INPUT

IO5

RS485_TX

IO34_INPUT

SW1OUTPUT

CAN_L

IO33

AVRISP_RESET

MODULE_RX1

CANBUS_TX

IO34_INPUT

RESET

TOUCH_IRQ

I2C_SDA

SW2EXT

IO21

VSPI_MOSI

VSPI_CLK

VSPI_MISO

RS485_ENABLE

RELAY4_SSR

SD_CS

VSPI_MOSI

SD_CS

SW2EXT

IO16

IO35_INPUT

EXT_IO_A

SSR3_4

CANBUS_RX

VSPI_MOSI

IO27

HSPI_CLK

CANBUS_TX

IO35_INPUT

DISPLAY_LED

MODULE_RX1

VSPI_MOSI

RESET

IO0_BOOT

SW1EXT

SSR4_3

IO25

HSPI_CLK

IO15

VSPI_MISO

DISPLAY_DC

IO22

Fused5V

3.3V

Fused5V

3.3V

Fused5V

3.3V

Fused5V

3.3V

Fused5V

3.3V

Fused5V

3.3V

Fused5V

3.3V

Fused5V

U20

Manufacturer Part Number

Adafruit ILI9341

R20

Resistance

1MΩ

Current

1.85 A

Resistance

2.2kΩ

R16

Resistance

2.2kΩ

R25

Resistance

220 Ω

R27

Resistance

51kΩ

R28

Resistance

22kΩ

Resistance

560 Ω

Resistance

51kΩ

Resistance

2.2kΩ

Resistance

120 Ω

R14

Resistance

560 Ω

R13

Resistance

560 Ω

R18

Resistance

220 Ω

Resistance

120 Ω

R26

Resistance

22kΩ

R21

Resistance

220 Ω

R17

Resistance

220 Ω

Resistance

120 Ω

R12

Resistance

220 Ω

Manufacturer Part Number

TCA6416APWR

LED2

Capacitance

100nF

Manufacturer Part Number

SN65HVD1050D

Capacitance

100nF

Capacitance

22uF

LED4

Manufacturer Part Number

1N5338BRLG

Capacitance

100nF

Capacitance

100nF

C10

Capacitance

1uF

LED3

Capacitance

1uF

Capacitance

22uF

C11

Capacitance

1uF

Manufacturer Part Number

ESP32-DEVKITC-32D

J15

Manufacturer Part Number

0472192001

SJ4

Manufacturer Part Number

AO3401A

Manufacturer Part Number

LL4148

Manufacturer Part Number

DB125-3.81-4P-GN-S

Manufacturer Part Number

LL4148

SJ1

Manufacturer Part Number

DB125-3.81-4P-GN-S

Not Recommended for New Designs

Manufacturer Part Number

AO3400A

SW2

U12

Manufacturer Part Number

AQY282SX

RX1

Manufacturer Part Number

NUP2105LT1G

Not Recommended for New Designs

Manufacturer Part Number

AO3400A

SW1

Manufacturer Part Number

SN65HVD75DR

LED1

Manufacturer Part Number

AQY282SX

Manufacturer Part Number

TXS0102DCUTG4

Manufacturer Part Number

SRD-05VDC-SL-C

Not Recommended for New Designs

Manufacturer Part Number

AO3400A

Manufacturer Part Number

SRD-05VDC-SL-C

Reviews

Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
20.5M
Net Portal
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
jharwinbarrozo
43.0M
Power Net Portal
Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
jharwinbarrozo
11.4M
Generic Resistor
A generic fixed resistor ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Capacitor
A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF, 10pF, 100pF, 1000pF, 0.01uF, 0.1uF, 1.0uF, 10uF, 100uF, 1000uF, 10000uF 1.1pF, 11pF, 110pF, 1100pF 1.2pF, 12pF, 120pF, 1200pF 1.3pF, 13pF, 130pF, 1300pF 1.5pF, 15pF, 150pF, 1500pF, 0.015uF, 0.15uF, 1.5uF, 15uF, 150uF, 1500uF 1.6pF, 16pF, 160pF, 1600pF 1.8pF, 18pF, 180pF, 1800pF 2.0pF, 20pF, 200pF, 2000pF 2.2pF, 22pF, 220pF, 2200pF, 0.022uF, 0.22uF, 2.2uF, 22uF, 220uF, 2200uF 2.4pF, 24pF, 240pF, 2400pF 2.7pF, 27pF, 270pF, 2700pF 3.0pF, 30pF, 300pF, 3000pF 3.3pF, 33pF, 330pF, 3300pF, 0.033uF, 0.33uF, 3.3uF, 33uF, 330uF, 3300uF 3.6pF, 36pF, 360pF, 3600pF 3.9pF, 39pF, 390pF, 3900pF 4.3pF, 43pF, 430pF, 4300pF 4.7pF, 47pF, 470pF, 4700pF, 0.047uF, 0.47uF, 4.7uF, 47uF, 470uF, 4700uF 5.1pF, 51pF, 510pF, 5100pF 5.6pF, 56pF, 560pF, 5600pF 6.2pF, 62pF, 620pF, 6200pF 6.8pF, 68pF, 680pF, 6800pF, 0.068uF, 0.68uF, 6.8uF, 68uF, 680uF, 6800uF 7.5pF, 75pF, 750pF, 7500pF 8.2pF, 82pF, 820pF, 8200pF 9.1pF, 91pF, 910pF, 9100pF #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Inductor
A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
jharwinbarrozo
15.8k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
RMCF0805JT47K0
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
jharwinbarrozo
1.2M
875105359001
10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
jharwinbarrozo
1.2M
CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
jharwinbarrozo
1.1M

Project Name

ESP32 Battery Management System Controller Board

Description

ESP32 Battery Management System Controller Board – An innovative solution for smart power control and audio recording integration. This cutting-edge board harnesses the power of the ESP32 microcontroller to deliver precise battery management and seamless integration with an S3 Voice Recorder subsystem. Perfect for advanced IoT applications, the board’s robust design ensures reliable energy optimization, remote monitoring, and real-time performance coupled with high-quality voice recording capabilities. Experience enhanced connectivity, efficient power regulation, and smart audio functionality, all in one compact package that paves the way for next-generation smart devices.

#ESP32 #BatteryManagement #VoiceRecorder #IoT #SmartDevices #ControllerBoard

Properties

License

creativecommons.org/licenses/by/4.0/

Software

github.com/stuartpittaway/diyBMSv4ESP32

Pricing & Availability

Distributor	Qty 1
Arrow	$6.66–$10.40
Digi-Key	$20.58–$31.66
LCSC	$8.14–$8.45
Mouser	$11.15
TME	$3.11
Verical	$6.63–$11.97

Controls

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jharwinbarrozo / ESP32 Battery Management System Controller Board

Schematic