Simple authorization on PHP+MySQL+JavaScript+AJAX

The main purpose of this script is educational. The script shows how you can solve the problem of authorized access to some data. In addition to authorization, the example also implements the forms for viewing, adding, editing and deleting users. Also minimal security is observed – the data is filtered, the types are checked, the passwords are not stored and are not transmitted in the clear. I know that MD5 bruteforce very quickly, so to work, use your own, more reliable algorithms 😉

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Wireless headphones BH503. Dismantling and replacing the battery.

BH503_wireless_headphoneThese headphones have been remarkable Chinese bought me at aliexpress for $ 15 and a half years ago and I even almost started to demand the return, failing to include them almost daily. Most of the instructions states that in order to enable it to press and hold the call button, but in my case it was not working. It turned out that the headphones BH503 included if at the same time hold down the “Volume +” at the end and the call button. If you hold these buttons a little longer, then they move to the connection mode, as evidenced by the rapid blinking of the LED. In doing so, they actually differ from the branded headphones nokia.

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Using TSOP4836 for reading codes with IR microcontroller PIC18F2520

Probably many of the fans of development on microcontrollers least a couple of times but the thought of the possibility of the control device using a standard IR remote control from the TV. Particularly captivating is that to connect the IR sensor TSOP4836 required just simply one free pin and two resistors! Once I tried this option.
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Replacing the battery in the battery module controller ADAPTEC 5405 (abm-800)

adaptec 5405

Adaptec 5405 RAID controller with battery

Who using the raid controller with battery module, sooner or later required to face the need to replace this battery. I have a RAID-the Adaptec 5405 with battery worked for about four years, and then the utility began to show that the battery needs to be replaced. All anything, but go shopping, I suddenly discovered that this is the unit costs about $140! But judging by the size of the batteries and the words I assumed it would be easy to solder to the battery of a mobile phone worth about $3.

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Introduction to graph database Neo4j

Once there, the in 2005, I got sick of the idea of creating a knowledge base that does not have a clear table structure and would work on the principle of named nodes and links between them. The idea was such that the node itself is not carrying any information and all information would set its surroundings and relationships. I then wrote a little code repository of nodes and links, as well as simple operations on them, but do not store information in the nodes was too hard and I’m tied to each node one text property (in Neo4j in a knot, you can burn a lot of properties of different types and then refer to them by name).

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Repair of E27 LED lamp 5730SMD

In a previous post I wrote about my experience of buying LED lamps. A couple of days ago I finally was covered with the first of them and I hope for their maintainability, I decided to restore it.

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IMAX B6 connection to the PC via USB (PL2303HX) (unsuccessful)

зарядка IMAX-B6Owners wonderful charging IMAX B6 is well known that it has a jack for connecting to a computer, but the truth is no USB interface adapter many stops.And I wanted to get interesting graphics in the process of testing the batteries on aliexpress and I ordered a USB-adapter (PL2303HX USB) worth $1.6.

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Cheating customers LED-lights on aliexpress Chinese

Probably there are few in the house who used to illuminate the bulb. For years, all of them are gradually replaced by more fuel-efficient fluorescent. But now the market is even more energy-saving bulbs – LED. However, their widespread use hinders a very high price. Significantly also save when they purchase can be ordered through the Chinese, through aliexpress, which I did, because the money was sorry and try very much.

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Crib on DevExpress cxGrid and Delphi 7

Some techniques for working with the component cxGrid, collected from various sources and helpful to me personally.

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The Windows 2008 R2 Hyper-V and AMD FX-6100 (solution with the launch of virtual)

As usual, they say – “there were no signs of problems,” but one day I was tempted by cheap of cores and AMD decided to make a six-server virtual ok. The problem got out suddenly, just when everything is set up and the matter was for the transfer to the new server multiple virtual ok, it turned out that they just will not start. Note that in the BIOS usually has the option of virtualization, I certainly useful to include it, but the problem is not solved and had to dig the Internet …

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