diy - solar battery charger
In this tutorial, I will show you how to use the TP4056 chip to use solar energy or simply use the sun to charge a lithium 18650 battery.
Wouldn\'t it be cool if you could charge your phone\'s battery with the sun instead of a USB charger.
You can also use this project as a DIY portable power bank.
The total cost of this project, excluding the battery, is less than $5.
The battery will add another $4 to $5.
So the total cost of this project is about $10.
All components can be sold at very good prices on my website, linked in the description below.
For this project we need :-
5 v solar cells (
Make sure it is 5 v and not less than 5 v)-
General circuit board-
A. 1N4007 rated diodes with high voltage and high current (
For reverse voltage protection).
The forward current of the diode is 1A and the peak reverse voltage rating is 1000 V. -Copper Wire -
PCB screw terminal block-2x
A 18650 battery standA 3.
7 V 18650 battery-
TP4056 Battery Protection Board (
With or without protective IC)-
5 V power booster-
Some connecting cables
We can see that it has a TP4056 chip and several other components that we are interested in.
There are two LEDs on board, one red and one blue.
The red one turns on while charging, and the blue one turns on when the charge is complete.
Then there is this mini USB connector that can charge the battery from an external USB charger.
You can also weld your own charging unit on these two points.
These points are marked as IN-
We will use these two points to power the board.
The battery will be connected to these two points marked BAT and BAT-(
A lot of self-explanation)
The board requires an input voltage of 4. 5 to 5.
There are two versions of the motherboard on the 5 v rechargeable battery market.
A module with battery discharge protection and a module without battery discharge protection.
Both boards provide 1A charging current and then cut off after completion.
In addition, when the battery voltage drops below 2, the power supply with protection turns off the load.
4 V to protect the battery from running too low (
(For example, on cloudy days)-
Can also prevent excessive
Voltage and reverse polarity connection (
It usually destroys itself, not the battery)
However, please check that your first connection is correct.
These boards get very hot, so I will weld them over the board.
To achieve this, I will make the leg of the board using hard copper wire.
I will then slide the device in the legs and weld them together.
I want to put 4 copper wires into the 4 legs of this circuit board.
You can use it too-
To achieve this, replace the copper wire with a male fragile pin head.
Very simple assembly.
Solar cells are connected to the inside and inside of the TP4056 battery charging boardrespectively.
The forward end of the reverse voltage protection is inserted into the diode.
And then bats and bats.
The board is connected to ve and-
Both ends of the battery. (
We just need to charge the battery).
Now, in order to power the Arduino board, we need to increase the output to 5 v.
So, we added a 5 v voltage booster to this circuit. Connect the -
The ve of the battery is-
Add the booster and ve in by adding a switch between the two.
Okay, now let\'s see what I did. -
I have connected the lift plate directly to the charger, but I recommend installing the SPDT switch there.
Therefore, when the device charges the battery, its unique charging and the input that the unused solar cell is connected to the lithium battery charger (TP4056)
The output is connected to the 18560 lithium battery. A 5V step-
The up voltage booster is also connected to the battery for conversion from 3. 7V dc to 5V dc.
The charging voltage is usually at 4. 2V.
The input range of the voltage booster is 0. 9 to 5. 0V.
So it will be seen around 3.
Input 7 v, 4 when the battery is discharged.
2 v when charging.
The output of the booster to the rest of the circuit will hold a 5 v value.
This project is very helpful for remote data logger.
As we know, the power supply is always a problem for remote recorders and most of the time there is no power outlet.
This situation forces you to use some batteries to power the circuit.
But eventually the battery will run out.
The question is do you want to go there and charge the battery?
For situations like this, our cheap solar charger project will be a great solution to power the Arduino board.
This project can also solve the efficiency problem of Arduino during sleep.
However, sensors and power regulators (7805)
It will still consume the battery in idle mode and drain the battery.
When we use the battery, we can solve our problem by charging it.
Thanks again for watching this video!
Hope to help you.
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