Its an USB Rechargeable led flashlight,Power & useful project and can be charged using smartphone charger or PC USB port.Read full detailed instructable and at the end you would find a youtube tutorial link.I hope you would like it.
Step 1: What Is It?How It Works?
hi guys,I'm back with new instructable USB rechargeable emergency flashlight.As the name implies its a rechargeable emergency lamp or flashlight that you can charge using your smart phone charger or PC usb port and use when going for walks outside at night time or searching anything ,etc.Its bright enough and easy to recharge and can charge in less than 1.5 hours.
Step 2: Materials:-
1. 1watt white LEDs -5 to 10 pcs
2.Ni-Mh rechargeable cell -4 pcs or 5v rechargeable battery-1pcs
3. Cell holder for 4 *AA batteries 1pc(if you prefer ni-mh battery pack)
4.USB male connector -1pc
5.switch(any type of switch as per your suitability)-1pc
6.Miscs such as wires,cardboard box,A4 size sheets (for covering box),screw driver.
Step 3: Circuit & the Stucture
Circuit here is itself very simple in this all the LEDs are connected in parallel on the PCB to make an LED panel.The battery terminals and the male USB connector terminal are also parallel to each other for charging purposes.All the cells are connected in series to each other in order to make a 5v battery pack.There is a switch between battery and LEDs panel. Good Luck .
Step 4: FINAL PRODUCT ,Charging and Usage
The device can be charged from your smart phone charger or from your PC usb port,and can charge upto full in just 1 hour.Its compact enough for you to carry it anywhere with you and is bright enough even with just 4 LEDs and you can use maximum upto 10 LEDs.Cover the box using white coloured sheet or you could use any color or paint it in any color you like to do so. Charge it for 1.5 hour and check the brightess.
CONGRATULATIONS ,YOUR USB EMERGENGENCY LAMP IS READY TO USE. Click Here for Youtube VIDEO
Step 5: CONTACT ME
Aabhishek Sharma made it!