The simplest way to charge the iPhone with a brand-name charger

1206RGB (single)

Single chip microcomputer STM32L151CCU6

Photocoupler

Nowadays, the spare battery designed for the iPhone is generally more expensive, and the ordinary backup battery needs to buy a dedicated charging head to charge the iPhone, otherwise it will not be able to charge. This is because the Apple product will detect the status of the USB port before charging (probably an activation signal, similar to the "Power Good" of the PC power supply). If the data pin is completely empty, it will not be charged. But the USB data terminal of most of the chargers is blank.

I bought a solar charger some time ago, and I can't charge the iPhone4...

Not all USB ports can charge Apple products

At present, there is a way to use the resistor divider to provide an activation signal to the USB data terminal to achieve charging for the iPhone. But a little complicated, not ordinary people can.

Don't say anything else, do you know where to buy these resistors?

Ok, talk nonsense, what kind of drawings go to hell, the simplest short circuit Dafa debut! ! !

In fact, as long as the two data lines of the USB port of the spare battery are short-circuited, the iPhone can be charged. Simple?

Ok, now take this solar charger to open the knife!

The author was excited, the photos before USB soldering were not taken, but there is another USB interface board in kind, so look at what it is.

This is what the USB charging port looks like after it is taken apart.

All we have to do is connect the two cores together. If your hand is clever, take a thin wire and put it in to wrap the two cores together. However, the author used a soldering iron and solder to make the short connection more secure. First pass the solder through the middle two cores, then wrap it out, solder it with a soldering iron, and get it!

The way to solder two data lines together.

You may ask, why not solder on the board... Hey, good question! Because the author really can't open the board (it is fixed by hot melt adhesive, the solder joint is on the reverse side). If you can get the board off, it is of course the best.

After the welding is completed, test it quickly.

Charging success!

It should be noted that when soldering, do not solder the two cores on both sides of the USB, otherwise the consequences will be very serious! ! ! If you have the condition, you can use a multimeter to confirm that there is no short circuit with the other two cores before plugging in the iPhone.