29.06.2020
Charging a mobile phone from a finger battery. SpareOne Phone: a mobile phone with AA batteries A mobile phone with AA batteries
The car broke down, the phone ran out of power, and the nearest settlement is an hour and a half of fast walking ... Probably, this is modern hell with all the abundance of the latest technologies. But one has only to be in such an extreme situation once in order to appreciate the mobile phone project SpareOne Phone, which does not run on batteries, but on "finger" batteries AA format.
The author of the amazing gadget was the company with the same name SpareOne. The designers presented their product in Las Vegas at the international exhibition CES 2012, positioning the device as the first in the world that "feeds" on energy from one standard Energizer Ultimate Lithium battery. However, it must be assumed that any other battery of a similar type will do.
Simple in appearance, the revolutionary mobile phone SpareOne Phone is made on the basis of the company's know-how, a patented energy-saving technology, thanks to which the battery life of the device increases to 10 hours, and in the off state it can spend about 15 years without losing charge. Who might need such a feature of the phone, given that even the newest model can be outdated earlier than in two years, it is not clear, but you must admit that such a prospect looks very impressive.
It is known that the original SpareOne Phone model will work within the GSM 850/1900 MHz and GSM 900/1800 MHz networks, and in emergency situations it will be possible to find out the location of the device and its owner using Cell ID. The developers do not talk about the availability of WiFi or Bluetooth in the phone, the ability to send MMS messages and business cards, and of course it does not have a camera, radio, or mp3 player. But in the woods or on the beach, in the mountains or outside the city, where there is neither an outlet nor a charger at hand, such a phone and a couple of spare AA batteries can save someone's life and health. More about the project - on the SpareOne website. 25.09.08
Despite the great popularity abroad, phones with a QWERTY keyboard are not in demand in our country. We are used to typing SMS using the 12-button method. Some mobile graphomaniacs can really compete with typists in typing speed. Why, they have a secret weapon like T9! However, the matter is not limited to short messages, every second phone is potentially capable of sending e-mail - and this function in the menu is already preparing a separate, more convenient place for itself.
Design
When closed, the phone, even hiding its QWERTY potential, does not look bulky. A large display, streamlined buttons, and tightly sealed microSD card and headset/charger ports. Everything looks quite neat and stylish. At first it seemed to me that there were too many buttons on the front panel, but after a couple of days this feeling disappeared. Extended keyboard capabilities are released with a flick of the wrist. In general, the design should be called youth, such as unisex. No, I'm still pretending - there is more feminine in it. The color scheme is too delicate, and in his appearance I lack sharper, clearer lines.
Keyboard
It is comfortable, but requires adaptation. The phone was designed primarily for the Latin alphabet, that is, for 26 letters. Preparing the device to enter the Russian market, LG faced the Cyrillic alphabet. It had to be placed more compactly, there was no place for the letter “ё” on the keyboard at all. Another six "extra" had to be hooked. To type one of these letters, you have to hold down the equivalent of Shift - the Fn button. In addition to direct text loads, the keyboard easily takes over the navigation. You can simply navigate through the menu, select items, sub-items, and so on. The problem is different. It will not be possible to quickly dial the number, the diagonal arrangement of numbers affects. Moreover, with insufficient light, you will have to master the skills of blind typing. The buttons are very dim.
Functions
The KS 360 is a budget model, but you can't feel the truncated features. Hot-swap microSD cards sometimes can not boast of more expensive models. Well, actually - the whole package of services: FM, MP3, photo, video and voice recorder. To these, which have already become traditional, LG added a purely Russian filling. The iDea Widgets application contains a set of domestic Internet maniac: ICQ, Bash.org.ru, Vkontakte, Odnoklassniki, Fishki, Gismeteo, various news feeds, etc., etc. The list can be continued for a very long time.
Chip
In the descriptions of many months ago, when the KS 360 was presented at international exhibitions, it was vying with each other that this slider would be equipped with a touch screen. You don't really need to open your phone to dial a number. There is a smart button. A numeric keypad appears on the screen. You press, and - oh, miracle! - the mobile phone responds with a pleasant vibration. At that moment, crazy associations with the iPhone arose in my head - especially since the numbers on the screen were replaced by letters at the next touch. But neither SMS dialing, nor vibration travel through the menu happened. No, that's all. The letters that were so successfully typed in a touch way - there is nowhere to apply: neither to search in contacts, nor to record new phones, and even more so - for SMS. To do this, you have to open the keyboard. Not a touch screen, but some kind of disabled person.
In this article we will tell you how to charge a mobile phone from a finger-type battery.
It often happens that you, while on the road, suddenly discover that your cell phone battery is dead, you need an outlet to charge it, and you absolutely need to make a call, and just be always in touch.
What to do in such a situation? Thrifty people often have two batteries per phone, one in the phone and the other either in the frog charger or already charged and ready to be replaced. But they can also be disappointed when the second battery dies due to a long “trip to the Alps”. What to do?
You can overcome this problem too. Our whole life in this modern age is “filled” with AA batteries, where are they not? I propose to barbarously take away from the child his toy, in which there are finger-type batteries and “suck out” energy from them, while charging the battery of a cell phone. Just be careful, the child has a dad!
To charge a five-volt cell phone battery, you need only one AA or AAA (in common people - little finger) battery and a special converter that produces as much as 5 volts from 1.5 volts. I first met such a charger (naturally made in China) in the Safari hunting store. An ordinary finger-type battery was inserted into a special cylindrical case, and a wire with a diverse set of adapters for various cell phones protruded from the case. Naturally, there was no adapter for my phone, so I did not buy this miracle of technology. My friend bought it and was happy with it. You insert the battery and in half an hour the phone is charged. Feel free to throw the battery into the trash, after making sure that it is not toxic and does not contain gold.
As you guessed, we will consider this scheme, and if you wish, we can assemble it ourselves.
The converter is implemented on an integrated circuit MAX756 (MAX731). Its complete analogue is our domestic chip KR1446PN1. There is only a slight difference, the MAX756 chip has a higher output current - up to 200 mA, while for KR1446PN1 it is half as much - 100 mA. In addition, the efficiency of "Max" is higher than our analogue. But ours is still better - it costs less! However, it is your desire which chip to use.
A man got rich, and according to the status and etiquette of his society, it is supposed to come to banquets with his wives and mistresses at the same time.
He brought his wife for the first time and says: That one on the couch is my Boss, that one is his wife, and that one by the window is his mistress. There is the head of a friendly corporation, next to him is his mistress, and at the table is his wife. And over there, by the fountain, is our mistress.
And the wife answered with delight: And ours is the most beautiful!
At present, they are just not trying to come up with this chip. The power supply and charger are good. Everything else is like a cat that has nothing to do.
The circuit diagram is shown below. The converter circuit occupies a place not exceeding one finger element in size.
The circuit operates on the principle of a pulse converter with energy storage in the charging choke. This is a typical "booster" circuit with PWM output voltage stabilization. The output of the circuit is a constant voltage of 5 volts. If the circuit is assembled correctly, then no settings are required.
The printed circuit board is equal in width and length to the dimensions of a standard AA battery. Board dimensions 13 x 51 mm. Flat brass springs are soldered to the edges of the printed circuit board to clamp the battery in them. These springs can be taken from the battery compartment of a "new" children's toy. No switch is used, the battery is inserted to charge the phone and removed after it is fully charged. The converter on the KR1446PN1 chip works stably when the input voltage drops to 0.8 V, and on the MAX756 - up to 0.7 V. Therefore, instead of simple finger batteries, you can use rechargeable finger cells. When the voltage from 1.4 volts (the nominal voltage of finger batteries) drops to 0.7-0.8 volts, the charging will simply turn off, and this residual voltage is acceptable for the battery, which can be used next time after the next charge.
The design of the charger used standard installation elements: small-sized capacitors of the K50-35 type, I used imported (flattened), which I dropped out of a burnt computer motherboard. The inductor is a standard EC-24 with an inductance of 18-22 μH.
The printed circuit board of the device and the location of the elements on the board are shown in the figure.
You can use anything as an output connector - a connector torn off from a "native" network adapter, or a friend's adapter, "crocodiles" from a measuring device, etc. For the sake of versatility, I soldered a USB connector to the board. My "Android" when its battery is discharged to 15%, it takes about 1 hour from this mobile device to fully charge it (without talking on the phone) and one "Energizer" alkaline battery.
Technique does not stand still, and for seemingly simple and understandable tasks, new perfect controllers appear. At the present time, the ncp1450 fell into my hands, on which I made a similar converter, but in a smaller size.
