Design with Adafruit Micro Lipo Charger in Cirkit DesignerThe Adafruit Micro Lipo Charger is a compact, versatile charging module specifically designed for lithium polymer (LiPo) batteries. This user-friendly device simplifies the process of charging small LiPo batteries by integrating power management circuitry and enabling charging through a USB connection. It is ideal for DIY electronics enthusiasts and professionals who require a reliable power source for portable projects.
This circuit is a voltage monitoring and display system powered by a 3.7V LiPo battery. It uses an ATmega328P microcontroller to read voltage levels from a DC voltage sensor and displays the readings on a 1.3" OLED screen. The system includes a battery charger and a step-up boost converter to ensure stable operation and power management.
Open Project in Cirkit Designer
This circuit is a multiwatt charger controlled by an Arduino Nano, featuring a 4x4 membrane keypad for user input, a 0.96" OLED display for output, and a DS3502 digital potentiometer for voltage adjustment. It measures voltage and current using analog inputs and adjusts the output voltage to achieve a user-defined power target, powered by a 12V battery and regulated by an XL6009 voltage regulator.
Open Project in Cirkit Designer
This circuit features an Arduino Nano connected to a battery charger, which in turn is connected to an 18650 Li-ion battery. The Arduino Nano is powered by the battery charger's output, and the battery provides the input voltage to the charger. There is no specific functionality implemented in the provided microcontroller code, indicating that the circuit is currently set up for power supply without any programmed behavior.
Open Project in Cirkit Designer
This circuit features an ESP32 microcontroller powered by a 3.3V regulator, which in turn is powered by a 18650 lithium-ion battery through a charger module. The charger module is designed to charge the battery via a USB connection and also provides power to the regulator. Ground connections are shared among the ESP32, regulator, charger, and USB interfaces, establishing a common reference point for all components.
Open Project in Cirkit Designer| Pin Number | Name | Description |
|---|---|---|
| 1 | BAT | Battery connection terminal (+) |
| 2 | GND | Ground connection |
| 3 | 5V | USB power input (5V) |
| 4 | GND | Ground for USB power |
| 5 | STAT | Status pin (charging indicator) |
Connect the Battery:
BAT pin.GND pin.Power the Charger:
5V pin from a USB power source.GND pin adjacent to the 5V pin.Select Charge Current:
Monitor Charging Status:
STAT pin can be connected to an LED or a microcontroller to monitor the charging status.LED Not Lighting Up:
Battery Not Charging:
BAT and GND pins.STAT pin does not indicate charging, ensure the battery voltage is below the charge cutoff voltage.Q: Can I charge multiple batteries at once?
Q: What does the STAT pin indicate?
STAT pin can be used to indicate the charging status. When charging, it can be connected to an LED that will light up; when charging is complete, the LED will turn off.Q: Is it safe to leave the battery connected to the charger after charging is complete?
// Example code to monitor Adafruit Micro Lipo Charger's STAT pin using Arduino UNO
const int STATpin = 2; // Connect STAT pin to digital pin 2 on Arduino
void setup() {
pinMode(STATpin, INPUT); // Set STAT pin as input
Serial.begin(9600); // Start serial communication at 9600 baud
}
void loop() {
int chargingStatus = digitalRead(STATpin); // Read the STAT pin status
if (chargingStatus == HIGH) {
// If STAT pin is HIGH, battery is still charging
Serial.println("Battery is charging...");
} else {
// If STAT pin is LOW, battery is fully charged
Serial.println("Battery is fully charged.");
}
delay(1000); // Wait for 1 second before reading the status again
}
Remember to keep the code comments concise and within the 80 character line length limit. This example demonstrates how to use an Arduino UNO to monitor the charging status of a LiPo battery connected to the Adafruit Micro Lipo Charger.