Are you worried about leaving your mobile phone plugged in overnight? Overcharging and battery overheating are common concerns for most smartphone users. This project offers a brilliant, simple solution: a DIY Automatic Mobile Charging circuit that cuts off the power supply after a set time.
This project is a game-changer for battery health, and the best part is that you don’t need to be a coding expert to build it!
Key Components Required
The circuit consists of the following essential parts:
- IC-555 timer
- Relay- 9v
- Step down transformer 9v-0-9v
- Transistor -BC548
- Diode- IN4007 -(4)
- Capacitors-1000µF, 470µF & 330µF (tantalum type) (All are above 25v rating)
- Buzzer-(1)
- Resistors-3..3MΩ, 10MΩ, 10KΩ, & 1KΩ
- SPDT switch
- Push to On switch
- LED (any color)
- AC plug socket
- AC plug
Circuit
The Simple Idea: Power Cut on a Timer
The core concept of this circuit is to act as a smart timer for your charger. Instead of manually unplugging your phone, this circuit automatically stops the current flow to the mobile charger once the programmed time is up.
This circuit doesn’t require any complex programming or advanced components, making it accessible for hobbyists and students. It can even be adapted to manage power for other small appliances in your home.
Customizing Your Charging Time
The time delay itself is calculated using a famous electronics formula (likely from a 555 timer IC circuit):
T = 1.1 * R* C
Where T is the time in seconds, R is the resistance value in Ohms, and C is the capacitance value in Farads. By changing the resistor and capacitor values, you can set the power cut-off time exactly how you want it.
In short, this DIY project is an excellent way to proactively protect your mobile phone’s battery health, ensuring you get the most life out of your device without worrying about leaving it plugged in too long!
Watch the full video tutorial here: How to make an Automatic Mobile Charging at Home | Automatic Power Cut