Trick to make 12000 MAH at home
The best way is to use LI ION cells,
You can get easily 3.7v li-ion cells from the old Laptop batteries.
Just Like the Once in the IMage.
Now you need to find out which one is working.
Check the Voltage of each cell if it is 4.2v it is fine.
(first try to charge it by a 4.2v charger or 5V is also good or one time)
Now connect all the Cells in parallel so if you have 2 cells 2600mA +2600mA = 5200mA Power Bank !
Now you need a Boost Circuit for 3.7v to 5v this you can easily get from TI or you can build you own.
IF you are not able to make a boost circuit than connect 2 cells in series and you will get 3.7v +3.7v = 7.2v 260mA and connect a LM7805 and a USB socket DONE. But Linear regulators waste lot of energy in the form of heat. You will also need a Charging circuit for series cells which you can use 9v adapter(ideally 8.4V)
You can get easily 3.7v li-ion cells from the old Laptop batteries.
Just Like the Once in the IMage.
Now you need to find out which one is working.
Check the Voltage of each cell if it is 4.2v it is fine.
(first try to charge it by a 4.2v charger or 5V is also good or one time)
Now connect all the Cells in parallel so if you have 2 cells 2600mA +2600mA = 5200mA Power Bank !
Now you need a Boost Circuit for 3.7v to 5v this you can easily get from TI or you can build you own.
IF you are not able to make a boost circuit than connect 2 cells in series and you will get 3.7v +3.7v = 7.2v 260mA and connect a LM7805 and a USB socket DONE. But Linear regulators waste lot of energy in the form of heat. You will also need a Charging circuit for series cells which you can use 9v adapter(ideally 8.4V)
Trick to take screenshot in pc | trick 2
Trick =2: Open Paint: Click the Start menu, navigate to the Windows Accessories folder — or the Accessories folder, if using Windows 7 — and click Paint. The icon depicts a painting palette with a brush on the right side, but it will vary slightly depending on your operating system. In Windows 8, press the Windows key to open the start screen. Afterward, click the down arrow in the bottom left, press Ctrl + Tab, or swipe downward from the center of the display to access the Apps View. From there, select Paint. In Windows 10, you can open the Start menu, go to All Apps, and scroll through the alphabetical list until you find paint.
Trick to take screenshot in windows 10,7,9 | Trick 1
Step 1: Capture the image – Assuming the area you want to capture is displayed on your screen, press the Print Screen (often shortened to “Prt Sc”) key, typically located in the upper right corner of your keyboard, to capture a screenshot of your entire display. Alternatively, press Alt + Print Screen to merely capture a screenshot of the active window.