Smart 18650 Battery Charger with OLED
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3D-printed smart 18650 battery charger with OLED, real-time current monitoring, voltage, battery level, and mAh tracking
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Informacje o modelu
- Źródło
- Printables
- Kategoria
- Electronics
- Licencja
- Creative Commons — Attribution — Noncommercial
Build your own 3D-printed smart 18650 battery charger with real-time charging monitoring!
This project combines a custom 3D-printed enclosure, an ESP32-C3 SuperMini, an INA219 current sensor, a TP4056 charging module, and an OLED display to create a compact and practical battery charging station.
⚡ Features
Real-time charging current monitoring in mA.
Charging capacity tracking in mAh.
Battery voltage measurement when not charging.
Estimated battery percentage displayed on the OLED.
Automatic battery detection with a "NO BATTERY" message.
Automatic switching between charging and idle modes.
Standalone operation without Wi-Fi or a computer.
🔧 Components
ESP32-C3 SuperMini
INA219 Current and Voltage Sensor
https://s.click.aliexpress.com/e/_c4ShXJob
TP4056 USB-C Charging Module
https://s.click.aliexpress.com/e/_c4kJ4L2P
0.96-inch OLED Display
https://s.click.aliexpress.com/e/_c4Esig6x
18650 Battery Holder
MT3608 DC-DC Boost Converter
https://s.click.aliexpress.com/e/_c4cTeCaL
Connecting Wires
AA Battery Holder (3 Batteries)
https://s.click.aliexpress.com/e/_c3evEWhDReverse Polarity Protection Module
https://s.click.aliexpress.com/e/_c4SrQcb9
18650 Battery Holder
M2 × 12 mm Nylon Screws
22–24 AWG stranded wire
18650 Li-ion battery
https://s.click.aliexpress.com/e/_c2JAESRN
Mini Rocker ON/OFF Switch
🖨 3D Printing
The enclosure is designed to accommodate the electronic components and provide a compact, organised charging station.
The design is suitable for PLA or PETG printing.
🔌 Wiring Diagram & Arduino Code
The complete wiring diagram is included in the project images to help you connect all the electronic components correctly.
The Arduino code is also available through the download link provided in the description.
https://bambu3design.com/smart-18650-battery-charger-with-oled/
🎥 Build Tutorial
A complete step-by-step tutorial, including assembly, wiring, programming, and testing, is available on my YouTube channel: Bambu3Design.
Download the 3D model, print the enclosure, and build your own smart battery charger!