Kyocera hack

Don't "don't be a hero". How to kill yourself with electricity. The Joule Thief. Youth Happens. Cell phone car chargers are plentiful, inexpensive, and rarely compatible with a new phone.

An upcoming car trip created a need for a small variable supply I could use for the duration. These factors, and a mention of hacking phone chargers on one of the sites I regularly read inspired me to crack open an old charger.

Initial Device. Note that many of my naming conventions for parts and nodes are arbitrary - they must just be consistent through this process. In this case, the cathode of diodes and the positive side of polarized capacitors were pin 1 of the device, and non-polar devices were simply a matter of order encountered.

This is a nice board to work with - the parts are all labeled with designators. If they are not, make a sketch or take a picture and assign your own labels to parts to help generate the list.

As a reality check, go through your connections list and make sure that all pins land in a node. From this list, we can start to construct a schematic. Again, we will reference this to the primary only IC. Note that node 4 is the ground node, node 6 is the fuse-protected input voltage node, and node 9 are is the output voltage node.

These reference can help make drawing the schematic less convoluted. Start drawing the parts from the IC, and get them all on the page. Fiddle and re-arrange until it looks logical. In this case, it helps greatly that a the device is simple, and b it seems to follow the reference schematic given in the On Semi datasheet. Patrick York, Jun 16, , PM. Initial Device To the right is a Kyocera charger, split open. There were no screws holding it together; a series of plastic posts kept the two halves together.

Careful application of a flat-bladed screwdriver pops it apart. Inside was a delightfully accessible circuit board - the components were all labeled and through-hole, and the IC was unobscured. First, to the internet with the IC. A search revealed that the On Semi MC is a multipurpose 1. The device is not fixed voltage, special purpose, or exotic in its requirements.

Further, the reference design on the datasheet indicates that output voltage is set with a resistor divider. So far, this is looking promising.

It is worthwhile to proceed to the next step, which is reverse-engineering the device. Reverse engineering There are multiple methods to reverse engineer existing boards. This particular board is a single-sided PCB with through-hole components, so nothing complex is called for. My method used was to generate a netlist by hand, using the IC as starting reference.

Looking at the solder side of the PCB: Start by choosing a set of connection points as your node 1 - since we are using the IC as starting reference, U U1, pin 1 will define node 1. Now make a list of all parts and their pins that are connected to that node connected to U Very easy to unlock my Kyocera C Great service I have no problem recommending them.

Thanks, Angel. It took about 8 working days for me to get my code but they delivered nonetheless. The code worked flawlessly, thanks guys. Unlock-Network Unlock Kyocera. Select Phone Step 1.

Select your Kyocera phone model from the list change manufacturer. Unlock Kyocera phone In an age of cheap manufacturing, Kyocera phones are built to last.