Youtube Video Link: https://youtu.be/7p-1b5B28EQ
This tutorial is about making a simple solar Emergency Lamp by using 20 straw hat LEDs and a TP4056 charging module. The making procedure is clearly shown in the above video.
You can charge this solar Emergency Lamp by using your smartphone charger as well through the inbuilt solar panel. You can also use it as a Power Bank to charge USB devices like smartphones and tablets. Two powerful 3400 mAh 18650 Li-Ion batteries are used for backup.
Features:
Emergency Lamp ⠀
Solar cum USB charging ⠀
6800 mAh Powerbank
Schematic Diagrams:
Note: The resistor watt mentioned in the above schematic was not correct, it needs a higher wattage resistor. I have noticed the resistor is heating up rapidly and I am also not getting the desired brightness from the LEDs.
To overcome the above issue, I modified my schematic as shown below, now it is working like charm.
I will highly recommend using the modified schematic.
How does it work?
The main components of the solar Emergency Lamp are 1. Solar panel 2. 18650 Li-Ion battery 3. Battery charger module (TP4056) and straw hat LEDs. The 18650 batteries can be charged from a solar panel or smartphone charger through the TP4056 charger module. The 16 straw hat LEDs are connected in parallel through the current limiting resistor ( 10 Ohm / 0.25W ). The LED circuit is connected to the TP4056 Output terminal through a rocker switch.
The Power bank circuit is consists of a boost converter module and USB socket. The battery voltage is a boost to 5V and connected to the USB socket.
Thank you so much for reading my article on Solar Emergency Lamp.
