Taobao to find a spare laptop, the requirements of portable and can be used, the most important cheap (if not cheap to buy it will want to sell it at a high price)
Chose xps13 L322x, keyboard screen defective, discounted price around 170, replaced keyboard 20. overall weight around 1.3kg, size A4 paper one centimeter long.
The i7 3517u dual-core can go up to 2.8Ghz, which is enough to run one or two pieces of software. xps backlit keyboard is comfortable and reasonable, and there is a separate INSERT key, which makes it easy to use shift+INSERT for this kind of paste shortcut.
If the budget can be more than a few hundred can choose xps13 9333,4 generation of cpu and 3 generation is almost the same, but support for 1920 * 1080 touch screen also has another way to play.
The hard drive itself had msata mlc resistant builds before, and there are plenty of msata cheap and good used, and plenty of mlc particles.
The battery is still 85% healthy and seems to have been in stock for a long time. The main thing to look for is this, this computer has a power display on the side like a rechargeable battery. 200 bought an xps as a rechargeable battery to carry around for emergencies as a power supply nice.
The original power jack for the computer is a 4.5*3.0mm header, 19.5v45w, at first I thought it was just a matter of directly baiting the c-port 20v.
It was only when I opened it up that I saw that this connector has 3 ways, the green foot in the middle is the signal definition, if you don't connect it you can't charge the battery and the power of the computer is limited to 20w or less.
Check the information combined with Taobao, only to understand the need to have an IC circuit to signal in, Taobao directly inside the 5525 with IC to 4530 is only 5 dollars.
But how is it possible to go out with so many connectors?
See: /read/cv7197898/?spm_id_from=333.976.0.0
Turns out you can just buy the decoder, Taobao DS2501 decoder plus shipping for $4.
Wiring circuits: keep it short and crude, no diodes or resistors will work:
To be safe, the signal side still gives him a 300Ω resistor in series. It feels like a 10Ω or so resistor will do.
Lured the mouth to choose the yzx Yang boss's
The last is the installation effect: strong pressure some gaps, acceptable, does not affect the use of
45w comfortable and perfect!