Circuit Documentation

Summary

This document provides a detailed overview of a circuit design that includes various components such as a Barrel Female connector, Jack connector, Li-ion batteries, a Waveshare UPS, a 12V power supply, a Solar Charger Power Bank, and an MRB045 module. The circuit is designed to manage power distribution and charging for a set of Li-ion batteries, with connections to external power sources and a microcontroller for control.

Component List

1. Barrel Female 5.5mm 2.1mm

   • Pins: +, -, PWR IN+, PWR IN-
   • Description: A barrel connector for power input.

2. Jack 2.1

   • Pins: V+, V-, PWR OUT+, PWR OUT-
   • Description: A jack connector for power output.

3. Li-ion battery 18650-2000mAh 3.7V 7.4WH

   • Pins: +, -
   • Description: A rechargeable Li-ion battery.

4. Waveshare UPS 3S

   • Pins: 5V-, BAT+, BAT-, Input+, 5V+, Input-, Switch+, Switch-, -, +
   • Description: An uninterruptible power supply module.

5. 12V power supply

   • Pins: +, -
   • Description: A 12V power supply unit.

6. Solar Charger Power Bank

   • Pins: +, -
   • Description: A solar charger power bank.

7. MRB045

   • Pins: + BAT, GND BAT, GND IN, + VIN
   • Description: A power management module.

Wiring Details

Barrel Female 5.5mm 2.1mm

• PWR IN+ is connected to:

  • PWR OUT+ of Jack 2.1
  • + of 12V power supply

• PWR IN- is connected to:

  • PWR OUT- of Jack 2.1
  • - of 12V power supply

• + is connected to:

  • Input+ of Waveshare UPS 3S

• - is connected to:

  • Input- of Waveshare UPS 3S

Jack 2.1

• V+ is connected to:

  • + BAT of MRB045

• V- is connected to:

  • GND BAT of MRB045

• PWR OUT+ is connected to:

  • PWR IN+ of Barrel Female 5.5mm 2.1mm
  • + of 12V power supply

• PWR OUT- is connected to:

  • PWR IN- of Barrel Female 5.5mm 2.1mm
  • - of 12V power supply

Li-ion battery 18650-2000mAh 3.7V 7.4WH

• + of one battery is connected to:

  • + of Waveshare UPS 3S

• - of one battery is connected to:

  • - of Waveshare UPS 3S

• - of another battery is connected to:

  • - of another battery
  • - of Waveshare UPS 3S

• + of another battery is connected to:

  • + of Waveshare UPS 3S

Waveshare UPS 3S

• Input+ is connected to:

  • + of Barrel Female 5.5mm 2.1mm

• Input- is connected to:

  • - of Barrel Female 5.5mm 2.1mm

• + is connected to:

  • + of Li-ion battery 18650-2000mAh 3.7V 7.4WH

• - is connected to:

  • - of Li-ion battery 18650-2000mAh 3.7V 7.4WH

12V power supply

• + is connected to:

  • PWR IN+ of Barrel Female 5.5mm 2.1mm
  • PWR OUT+ of Jack 2.1

• - is connected to:

  • PWR IN- of Barrel Female 5.5mm 2.1mm
  • PWR OUT- of Jack 2.1

Solar Charger Power Bank

• + is connected to:

  • + VIN of MRB045

• - is connected to:

  • GND IN of MRB045

MRB045

• + BAT is connected to:

  • V+ of Jack 2.1

• GND BAT is connected to:

  • V- of Jack 2.1

• GND IN is connected to:

  • - of Solar Charger Power Bank

• + VIN is connected to:

  • + of Solar Charger Power Bank

Documented Code

Waveshare UPS 3S Microcontroller Code

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

This code is a basic template for the Waveshare UPS 3S microcontroller, with setup and loop functions ready for further development.