Solargoods's Blog

Use mobile phones have such an experience: when suddenly without electricity for mobile phone battery charger, because of absence or find can recharge, affects the normal use of the mobile phone. In order to solve this problem, this paper introduces a kind of solar cell phone charger, solar panels, it uses the circuit dc voltage transform to phone battery, the battery can automatically charge.

Working principle

Solar cells in the use of the sun when changes, its resistance and high output voltage instability, therefore, the output current is small, it will need to use a dc voltage transform circuit transform for mobile phone battery, after dc transform circuit (see figure 1, it is single pipe dc, using the ocl circuit transform flyback converter type. When the switch VT1 turn-on, high-frequency transformer winding NP induction T1 primary voltage is 2 to 1, secondary coil Ns for 5 is 6, VD1 rectifier diode, then in cut-off frequency transformer winding T1 through primary energy storage; NP When the switch VT1 deadline, secondary coil Ns for 5 6, high-frequency transformers are stored energy through T1 VD1 rectifier and capacitance C3 to load output filter.

Circuit principle briefly described as follows:

VT1 triode tube for switching power supply, and T1, R1, R3, etc ZiJiShi C2 oscillating circuit. After the input voltage, electric and VT1 flow through the start of passive resistance R1, make VT1 conduction.

VT1 conduction, transformer winding will add input dc voltage Np, its collector current Ic in the Np, linear increase in three positive feedback coil Nb produce inductive voltage 4, VT1 got fired for positive, base is negative, the positive feedback, the voltage to VT1 R3 C2 into the base current collector current VT1 make further increases, the positive feedback, which produces an avalanche VT1 saturated conductivity. In VT1 saturated conductivity, through primary coil Np T1 stored energy.

Meanwhile, inductive voltage to C2 charging, with the increased C2 recharging voltage potential VT1 base, when VT1 low gradually become the base current change cannot satisfy their continued saturated, VT1 exit saturated zone put into the region.

VT1 into amplification, after the collector current amplification of the maximum down before 3 negative feedback coil Nb produce inductive voltage, the four are made VT1, its base current collector current then decreases, and the positive feedback again, VT1 rapidly by an avalanche.

After the deadline, VT1 T1 stored energy of transformer winding, provide loads of secondary 5 6 Ns is VD1 diode rectifier voltage filter, get in C3 to mobile phone battery dc voltage.

In VT1 deadline, dc power supply input voltage and Nb induction of 3 and 4 are voltage by R1, R3 to reverse charge, and gradually improve C2 VT1 base, its potential to conduction, turn again reached saturation, circuit that repeated oscillation.

VD2 R5, R6, components, such as pressure, VT2 circuit, in order to protect the battery charging, here is not to 3.6 V battery charging as an example, the voltage limit 4.2 V. In the process of rechargeable battery, the battery voltage rise gradually, when recharging voltage than 4.2 V, via R5, R6 pressure stabilizing VD2 began after diode conduction, make VT2 conduction, distribution of reduced VT2 is the base of current VT1 VT1, thus reduce the collector current Ic, reached the limits of the output voltage. This circuit has stopped battery charging current, voltage, small current will maintain the batteries in 4.2 V.

Component selection and installation

VT1 requirements, hEF > Icm 0.5 for 50-100, 2SC2500 available for 2SC1008, etc, VD1 voltage stabilizing 3V for the value of the diodes.

High-frequency transformer, using self-made E16 T1 to the magnetic ferrite, Np by φ 0.21 enameled wire around 26 ratios in φ 0.21 enameled wire, Nb around 8 ratios, Ns with φ 15 turns around 0.41 enameled wire. Note that each wound up to locate the coil not make a mistake, avoid vibration or output voltage circuit can not normal. When two magnetic cushion layer thickness between about 0.03 mm plastic film for air-gap magnetic cores.

Solar panels for use 4 x 6cm 6cm area of silicon solar panels, its non-load output voltage, current 4V when working for 40mA for when the output voltage for 3V. Due to the dc converter working efficiency as the input voltage and increased, so 4 pieces of solar panels, then use after series of input voltage circuit for 12V. Readers can according to your specifications of solar panels can be bought the quantity and decided to use the method.

After the installation is complete, and will be connected to the solar panels, the sunshine on output voltage circuit, idling about 4.2 V, when the load voltage output than 4.2 V when the resistance can be appropriately reduced R5, and increasing the resistance R5). Work with the current circuit, normal light intensity is about 40mA, then charge current 85mA about.

With great power comes great responsibility, like spiderman uncle said. We are eager to power. We need it. When we have it, we tend to be crazy.

Especially when the power of music players, mobile phones and juice of mobile games. If you have a telephone call before death needs a tractor (or, worse, you suddenly turned off, as you light was defeated the enemy), you know the sting of empty battery icon. But it is not so good.

I have seen many different solar cell phone charger, but Powermonkey explorer is the most comprehensive. Essentially, a small but powerful rechargeable batteries, developers can be used to supply all kinds of mobile devices, including most types of cell phone, digital music players and handheld devices and any can through the trapezoid – shaped mini – USB plug. These days, it is a complete trough gadgets.

This Powermonkey explorer in one of three ways: by attached to a USB ports on your computer, it into a wall outlet or – this is here, and it’s the transaction of small solar panels, and then put it under the sun. Any media? No problem!

The versatile make Powermonkey explorer useful for a lot of different people. Road warriors, give a blackberry rocks and various other small regularly invention will find it is a compact, the source of all their spare power devices, and have enough tiny battery charger, most of the mobile phones with juice from the dead in a few hours.

Globetrotters will like it, because it is used for almost all the adapter outlet in the world. If you ever go abroad, to realize your iPod charger doesn’t fit in weird – shaped socket, you will enjoy it.

And solar panels to make it great as beach backup. You don’t even have brought charger, solar panel itself can be directly into most small parts.

Two variables. This Powermonkey explorer is equipped with a pile of different adapter, both for yourself and socket gadgets, this is a painful tracking. Of course, you only need to those with your special gadgets, so no big deal.

The solar panels, although very cool (and environmental protection), recharges equipment is very slow. Even in full sun panels that it can reveal in a day of the battery, also can not keep explorer device is attached to completely plug and run. But at least it will expand their battery, which means you can make your phone or iPod to spend the whole day is in the sea.

Many other small parts and not exactly – an Powermonkey explorer – – the price from $100 to the price to $140, although it can directly from the Internet for $110, UK manufacturers including transportation, there are few bad things said the shock of small primates.

Are you thinking about buying the iphone solar cell phone charger? Read this before you do. First, this phone solar charger only works with the iPhone 3G & 3G(S) models, so if you have anything less, you will be wasting your time. Some people thought that solar charger would work with any model cell phone but that happens not to be the case. If you plan on buying the new iphone or you already have the right model phone, keep reading.

The solar charger for the iphone is able to charge while you are on the phone, surfing the built in browser, or even playing games. So being able to charge while on the go is totally worth if you are like me, who wants to constantly surf. You can also sync your music, apps, or podcasts, while the iphone is in the Solar Surge Case. It has a slit at the bottom of the casing to plug into, so you do not have to constantly remove the phone every time. So I think that this is very useful, because no one wants to take out the phone and put it in the solar charger everyday, it gets a little tiring.

During my late nights I will be at the clubs, so having the built in battery pack really saves my phone. Plus, I like to see what is open and also text my other friends to meet up. And because there is no sunshine in the night, the battery is very useful to me. I would never have bought the solar powered case if it did not come with a battery pack. I am very pleased that it has the battery built-in.

There is a small camera opening for the solar powered iphone case which allows me to take shots wherever and whenever without taking the iphone out of the case. This makes it even more convenient. The camera opening was very smart on the developer’s part, which makes me think highly of them.

As you can see, there are some great reasons to purchase the solar charger for the iphone, head over to an online store to learn more and buy your own Solar Surge. I recommend you buy the black colored model because the scratches that will happen won’t show up as easily. And the black colored Surge is the first one to come out, so it is the original.

You can learn more about the solar cellphone charger for iphone at internet business website. You can also learn more about the iphone solar charger and what it can do for you there.