[Andy] has done a great job reverse engineering the LG KF700 cell phone display. LG’s KF700 is a 2008 era cell phone — that’s about 300 years old in cell phone years. The phone was somewhat novel in that it used a 3” diagonal 2:1 480×240 widescreen format. While the phone itself may be a memory, its screen lives on through the magic of Ebay.
Obtaining the LCD is the easy part – the hard part is figuring out how to interface to it. LG is very helpful in that regard by publishing detailed service manuals and schematics on their cell phones. We’re not sure if these manuals are supposed to be public domain, but Google is your friend here. With the help of the service manual, [Andy] was able to determine the LCD has an on board controller (Himax HX8352), making it much easier to interface to. He was also able to find out information about the LCD connector pin out, and even a connector part number.
Continue reading “Reverse Engineering an LG Cell Phone Display”
Our tips line is on fire with suggestions for us to cover the modular cell phone concept named Phonebloks. The phone’s designer states the problem as follows:
A phone only lasts a couple of years before it breaks or becomes obsolete. Although it’s often just one part which killed it we throw everything away since it’s almost impossible to repair or upgrade.
His solution is the above pictured phone, with modular components for each feature: wifi, camera, battery, etc. Rather than upgrade your entire phone, upgrade just the parts you need. A wave of followers have thrown their support behind this concept, and perhaps their hearts are in the right place hoping to reduce waste and cost. Behind the scenes here at Hackaday, however, the response has been a unanimous facepalm. The primary objection (other than design implausibilities) should be obvious: dividing the phone into exchangeable bits does not inherently reduce waste. Those bits have to go somewhere.
Now, don’t rush to the comments section to identify additional problems; there’s a juicy Reddit thread for that. Instead, we want to take the high road: Can we do better? Can we make a phone for the future that is less wasteful to produce, more easily recycled, and possibly upgradable? What would be included in its features, and how would we do it? Check out a video of the concept phone and tell us your alternatives after the break.
Continue reading “Ask Hackaday: Can we do better than Phonebloks?”
The wireless charging options available on flagship phones is a great feature, but most of us aren’t rocking the latest and greatest cellphone. [Daniel] came up with a great mod that adds wireless charging to just about every cellphone ever, at a very low price and a few bits and bobs ordered off eBay.
[Daniel] used a Palm Touchstone inductive charger – available for a few bucks on eBay – along with an inductive charging circuit from a Palm Pixi. This charging circuit was designed to complement the Touchstone charger, and is simple enough to wire up; all [Dan] needed to do was put the coil and charging circuit near the charge, and it output 5 Volts to charge any phone.
To get the power from the charging circuit into his phone’s battery, [Daniel] simply wired the output of the coil’s circuit to the USB in on the phone. The space inside his S2 was pretty tight but he was able to come up with two ways to install the charging circuit, for use with either the stock back cover or a third-party case.
For anyone with a soldering iron, it’s a quick bit of work to add wireless charging to any phone. We’re loving [Dan]’s solution, as the Palm gear he used is so readily available on eBay and junk drawers the world over.
[Mr G] in London sent in his pin sentry hack. He wasn’t pleased that the device looks like an old calculator, so he rigged up a SMS board to send him his pin on demand. He multiplexed the output of the display driver to the SMS board. When he authenticates from his phone, the board sends a message with the latest code.