Everyone can be in a situation in which there is no way to charge a mobile phone in the usual way. In such situations, ordinary batteries can come to the rescue, which are much easier to find, especially in emergency situations.
Let's start by watching the author’s video
[media = htts: //www.youtube.com/watch? v = E36JTkzsoO0]
In order to charge a mobile phone with ordinary batteries, we need:
- 4 finger batteries;
- 2 ohm resistor;
- rectifier diode;
- A connector for charging and a box for batteries.
The author uses a night lamp as the basis for a future charger. In the lamp used by the author, all the batteries are connected in turn. Thus, the total voltage is 6 volts. To charge most mobile phones, 5 volt chargers are used, which is why we need to use a limiting resistor so that the phone’s battery does not fail from the voltage received.
As for the rectifier diode, then almost any one will do. It is needed in order to prevent the batteries from recharging when they are completely empty. This diode can not be used only if you do not squeeze the entire charge out of the batteries to the bitter end. The author, for example, does not use it.
First of all, we disassemble the lamp. In the device that the author of the idea uses, there is a switch, which is also optional.
You can use a USB connection as a connector. From the USB cable we need only two wires - red and black, which are respectively the plus and minus wires.
We connect the resistor to the positive contact from the battery.
The other end of the resistor is connected to the diode, if any.
The minus from the battery, as well as the second end of the resistor, is connected to a USB outlet, observing the polarity.
From the side on the case we make a USB compartment. If desired, we additionally fix the connector with a glue gun.
Putting it all back. Our portable charging is ready. It remains only to insert the batteries and try it in action.
