Geek magazine hacker daily blog

Термостат-Вольтметр для авто

1 year, 5 months ago
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Привет! Сегодня я предоставляю вашему вниманию термостат+ вольтметр для авто. У меня на авто ЗАЗ 1102 вечно ломается кран и я решил сделать вот такой термостат который будет включать электроклапан, но чтоб задействовать ми контроллер как-то еще, я решил добавить вольтметр.

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Gathering electronic ink

1 year, 5 months ago
Today — 4 years since I got acquainted with screens on the basis of electronic ink.

As it appeared, "the tsar not this".

Anyway, but accurately four years of NOOK Simple Touch (NST) serve me faithfully as the eReader. And exactly as much there is my interest not only to read with E Ink of screens, but also to print on them.

Text typing using E Ink of displays: problem status


It is possible to select three methods to adapt E Ink the display to text typing:

  1. to type the text into the computer and to bring the image to external E Ink the monitor,
  2. to type the text on mobile E Ink the device
    • by means of the screen keyboard,
    • by means of the external keyboard connected through
      • USB OTG (on the example of NST, Onyx),
      • Bluetooth (on the example of Onyx),
      • WiFi the client with the server started on the computer (on the example of NST),
  3. to type the text into the computer, and to bring the image to mobile E Ink the device through VNC.

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The thermocontrol block for an electronic cigarette on Arduino

1 year, 5 months ago
This the device is intended for receipt of steam with temperature monitoring of a titanic spiral (for nickel or iron — it is necessary to change RTCHANGE coefficient) that allows to receive much (or much if the match brings enough liquid) couple without overheat with formation of different bad substances, decay products of glycerin, propylene glycol and fragrances.

The scheme is intended for work with the battery for RC models, from two Li-cells. I selected the accumulator 500 mAh 25C tension 7.4V. Current and output capability can be varied over a wide range if only issued sufficient current with a cold spiral when its resistance is minimum.



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The joystick for AppleII the hands

1 year, 5 months ago
I got as that after a community work day in a warehouse of the enterprise the Apple IIe platinum computer which is written off probably about 20 years ago. It rolled in a heap of other iron which became obsolete and if I did not take away it in time, it just would go to a dump. I got it without power supply unit, but it is nonsense, an adapter from standard ATX to solder not a problem. It is connected to the TV by normal RCA on a composite and has a little non-standard NTSC therefore all TVs that connected to it showed the black-and-white picture.
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The situation was changed only by a whistle of easycap USB 2.0 which though with jambs but displays color. No "rainbow" as on a screenshot should be below, but anyway it is more interesting to play with a color.
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Smart house. Everything begins with wires

1 year, 5 months ago
Shortly after I automated lighting in the village, we made a decision that it is necessary to make major repair in the Moscow apartment. It was the chance to implement the dream of "The smart house". That has to be in the smart house, I had no special understanding therefore I decided to be guided by the universal principle:" If you do not know what to begin the smart house with, begin with lighting".

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Circuit engineering of the charger for the on-line UPS. Part 5

1 year, 5 months ago
Part 1
Part 2
Part 3
Part 4.1
Part 4.2

Prolog


And again hello … In total with last New year and with other coming holidays! Time to pull out a muzzle from Russian salad at last to start parts of our cycle in which circuit engineering of power nodes will be described came.

My good mood
After the analysis of article devoted to a code under STM32 I understood — in vain spent time, level of readers and many commentators as I understood sufficient for independent writing of a code therefore I do not see sense in further analyses. All moments with a code will be limited to the description of algorithm and the detailed flowchart, everyone will be able to write an applet under the MK and though under an arduina. The truth you should not be upset that who wanted to repeat this device in original state — you can always receive a firmware in the form of .hex at me in a pm, and also order already stitched microcontroller at the price of cost of a stone and a postage. On it good news ended...

Now about this part — it will be devoted to the DC-DC transformer 310B-> 48B. That is we consider not all battery charger, namely the transformer. The rectifier and KKM will be separate part since functionally they at me are executed by the separate module on a separate payment.
Topology on which this transformer is constructed (or the power supply unit) — "the slanting bridge". Initially I wanted to leave option of the complete bridge without changes against pry. option, but rather large number of companions passed an opinion on complexity of the N-bridge, its high cost and low recurrence at such capacities. I thought and decided to apply my once favourite topology which appreciated its high recurrence. On topology of "the slanting bridge", by the way, many welding inverters with currents to 200-250A are constructed. Considering that at this stage on work I project an automatic welding semiautomatic device, in addition it is twice interesting to drive such solution.

And so — went....

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We play under DOS on the modern computer. Covox+Sneskey

1 year, 5 months ago
Now to play old kind shooter games under DOS anything special is not necessary, the dosbox emulator well copes with almost with all games. Who needs feeling of authenticity find old computers up to Pentium3, the main thing of ISA here the slot which gives the chance normally to connect the audiocard. Leaders here of course are sound blaster AWE 32/64. But there is an option to play also on the modern computer in which not that there is no ISA, and it is rather and PCI too. Now we will also consider it.
First of all we will set DOS 6.22 on usb the USB stick. I use for this HP USB Disk Storage Format Tool. We select when loading the USB stick and voila, we will play the majority of games without problems. But one big
NO, without sound. More precisely at most with the speaker, which in the modern PC just a pyezopishchalka. We change it on the normal speaker from an old computer, the sound of course will be better, but after all it is possible to achieve bigger.
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If you still had LPT port on a materinka, or at least will corrode for connection of a level with this port, then we will remember as in the late eighties — the beginning 90kh enthusiasts soldered the unpretentious 8 bit TsAPy on resistors using R-2R the scheme, a name which was COVOX.

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Management system greenhouse microclimate

1 year, 5 months ago

Beginning of a way


In one solar afternoon, having come to University, I learned that in this semester at me course on circuit engineering. The teacher suggested to make only the explanatory note "how to implement the project" or to learn a dark side of engineering and to create the real device. And as I was already on the 4th course, and having remembered that the only time when I put into practice the skills of the engineer was at the first year (fastened a book shelf to a wall), I decided "to work as handles". After short reflections, I selected the subject "Management System Greenhouse Microclimate". Most likely the choice was influenced by my love to automation of processes, or the fact that I also was engaged in cultivation of cucumbers in greenhouses. But we will long not pull — we begin.

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We do portable Dlink DIR320 router

1 year, 5 months ago
The router of Dlink DIR320 of audit of D1 lay at me on the shelf. There are no third-party firmwares, standard is poor. At first sight — a normal heartless box from Dlink, but not everything is so sad as it seemed earlier since for it there was a new firmware with significant increase in functionality and the new interface. What as a result we have? From considerable — the interface and Transmisson. And as this router was purchased from me for entertainments, give it a little "proaprgeydy". Let's add to it the accumulator!


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We squeeze out an Internet maximum of rural cells

1 year, 5 months ago
On the eve of New Year's holidays it was required to leave the capital a bit earlier, to leave it in the direction of such places in which the Internet happens quite seldom. For absence at work I promised workmates to be in touch. And as my kind of activity is directly connected with web, I decided to experiment with availability of the Internet in the planned place of stay.

Essence of a task was as follows:

  1. To reach the comfortable speed of the Internet.
  2. To distribute the Internet not only for itself, but also for the spouse.

We had 2 modems, 750 megabytes of the paid Internet, 3 notebooks, several phones and the whole set of sim cards of all sorts and coloring, access point with OpenWRT, usb hub, a flash card and the antenna. Not that it was the necessary stock for a trip, but if began to collect pieces of iron, it becomes difficult to stop. The only thing that caused in me concern - it is the antenna. Nothing in the world happens more helpless, irresponsible and weak, than the signal from the antenna which passed a cable through 3-meter usb. I knew that sooner or later we will pass also to this rubbish.

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