HardLabs

Smartpowerbank2026

MAIK97MAX·smartpowerbank2026·hardware/kicad/Smart_Powerbank_Jukic_Sayfutdinov.kicad_pcb

Smartpowerbank2026 PCB layout, top view — open source ESP8266 board by MAIK97MAX

About the Smartpowerbank2026 PCB

Smartpowerbank2026 is an open source ESP8266 PCB design by MAIK97MAX, published on GitHub. It is a 4-layer board measuring 83 × 26 mm, with 71 components from 32 distinct parts.

Its main chip is the ESP-12E, from the ESP8266 family. Other key parts include the ATMEGA328-A, AP2112K-3.3, INA219AXD, BQ27441-G1 and BQ24074RGT. By type, the board carries 27 resistors, 22 capacitors, 8 ICs, 3 connectors, 2 switches and 2 LEDs.

It belongs with the power & battery and displays & leds designs in this gallery.

From the project

A smart powerbank with USB-C charging and active system monitoring

- USB-C charging circuit with BQ24074 - Two regulated 5 V USB outputs - Voltage and current measurement for both outputs using INA219 - OLED display for live system information - Button-controlled display pages - ATmega328 firmware - Urboot bootloader and UART firmware updates

- BQ27441 fuel-gauge communication for battery voltage and state of charge - ESP8266 web interface - Battery temperature monitoring - Improved boost converter for higher continuous output current

Main components on the Smartpowerbank2026

ATMEGA328-AAP2112K-3.3INA219AXDBQ27441-G1BQ24074RGTMT3608ESP-12E

Smartpowerbank2026 bill of materials (BOM)

71 components, 32 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA328-A
ATmega328-A
U1
1
AP2112K-3.3
U2
2
INA219AXD
INA219AxD
U3, U4
1
BQ27441-G1
U5
1
BQ24074RGT
U6
1
MT3608
U7
1
ESP-12E
U8
3
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J1, J2, J4
1
Conn_01x04_Pin
3.3V GND SCL SDA
1
Conn_01x04_Pin
3.3V RX_ESP TX_ESP GND
2
TestPoint_Probe
5V, VOUT2
2
SW_Push
SW1, SW2
2
LED
3V3, +5V
1
D_Schottky
D4
1
n.b.
D6
1
4.7UH
4.7uH
L1
13
100NF
100nF
C1, C2, C3, C4, C5, C6, C8, C12 +5
2
1UF
1uF
C7, C17
3
10UF
10uF
C9, C10, C19
1
470NF
470nF
C11
Show 12 more
QtyPartRefs
2
22UF
22uF
C14, C21
1
4.7UF
4.7uF
C16
9
10K
10k
R1, R2, R3, R4, R5, R6, R7, R20 +1
2
5K1
5k1
R8, R9
2
3.3K
3.3k
R10, R11
3
0.01
R12, R14, R15
6
1k
R13, R16, R18, R19, R22, R23
1
47K
47k
R17
1
110K
110k
R24
1
15K
15k
R25
1
100K
100k
R26
1
n.b.
R27

Smartpowerbank2026 design files

The KiCad project lives in the MAIK97MAX/smartpowerbank2026 repository on GitHub; these links point at the commit this page was built from.

Smartpowerbank2026: common questions

What microcontroller does the Smartpowerbank2026 use?

The Smartpowerbank2026 is built around the ESP-12E, from the ESP8266 family.

How big is the Smartpowerbank2026 PCB?

The Smartpowerbank2026 measures 83 × 26 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Smartpowerbank2026?

71 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 Smartpowerbank2026 design files?

From the MAIK97MAX/smartpowerbank2026 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 Smartpowerbank2026 design in my own project?

The repository has no license, so all rights stay with MAIK97MAX. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Smartpowerbank2026 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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