The coin-based mobile battery charging system is developed in this project. The coin-based mobile battery charger can be quickly and easily installed outside any business premises. In this , we are using coin detector circuit based on IR proximity sensor. In real time , commercial coin detector mechanism can be used which accepts only valid coins. We are here making a prototype to demonstrate coin box using IR Proximity sensor. When coin is inserted, it gives logic signal to microcontroller. The microcontroller used here is from AVR family Atmega328 (Arduino UNO). It activates relay to provide power supply for the load. It also displays count down time on 16×2 LCD. When count down time gets finished , it automatically cuts off supply of the electrical load. In our project, electrical load is mobile charger. We are using 7805 regulator IC to get constant +5V voltage for the peripherals.
We are using regulated power supply which is given to all the units.
Software:
- ARDUINO IDE 2. EMBDDED CPP CODE 3. Proteus Simulator
Hardware :
- ATMEGA328 Microcontroller
- IR Proximity Detector (Coin Detector)
- 16×2 LCD Display
- Regulated Power Supply