Technical (टेक्निकल)

Made some changes to the previous version of my VB based Windows 8. More space for adding extra apps!! Added a fully customized web browser and a search engine. Also developed a dedicated Speech recognition tool and a text-to-speech application. From now on, my computer reads the e-books for me!! Henceforth don't let Microsoft rule your life. Make your own Windows 8 and make your own applications. Soon to be made available here for download (Demo Version) Stay tuned, More to come.

Difficulty Rating: 5/10 [Software] Don't have a Windows 8? Make one for your own, on Windows 7 itself!! I made this using VB.  Serves the purpose, right? It gives me full command over these apps (Metro apps). I have kept these apps enabled with a password. The User/Guest can access the destination path only if the password is correct. A different destination path is set for wrong password entries !!! Well, I don't wanna offend Microsoft by any means, but come on!! Make your own interface instead of using a pirated version of Windows 8   Here's the video. Hope you like it.                                    Soon to be available here for download. Enjoy!!

Difficulty Rating: 5/10 Abstract: This project gives an overview of the Sealed Maintenance-Free (SMF) Lead-Acid Rechargeable Battery charger using 3-pin  IC LM-317 as voltage regulator and opamp IC LM-324. In case of a simple battery charger, when the battery is fully charged and is left plugged in for more than a day or two, the battery may get damaged. In order to protect the battery from this major risk, the proposed battery charger is designed in such a way that the charging current falls gradually as the charging progresses. So the battery can be left plugged into this charger indefinitely, and it won't bother it in the slightest. Designing the Circuit:   Click the image to view the enlarged version The LM317 is an adjustable three-terminal positive-voltage regulator capable of supplying more than 1.5A over an output-voltage range of 1.25 V to 37 V. It is exceptionally easy to use and requires only two external resistors, R 2 ’ and R 2 ”  (R 2 ...

IC L293D, is the Motor Driver IC, which is usually linked to Robotics Applications. Even if you tend to use this guy, few basic questions still arouse in the minds of budding Hobbyists; Like Why 2 supply pins on the IC, How much voltage can be given to the IC, Should I short all the Ground pins of the IC ??????  Here, I'll be explaining the Pin description of L293D and not the specifications or other technical details. You can refer datasheet for that. L293D datasheet click here. To start with, any Microcontroller development Board works with a Max. of 5V, with a few hundreds of mA current. In case of ARDUINO Duemilanov: DC Current per I/O: 40mA DC Current for VCC & GND: 200mA  Is this current sufficient enough to drive a everyday 12V, 200RPM DC motor ? No.  So what ? Use a Motor Driver.  Does it help ? Yes. It converts low current to high, sufficient to drive a motor. Pin Conections (Important: Even pro's tend to m...

ORBO V 2.00 to roll during ISTE SAKEC Workshop on 9th March, 2013 ORBO V 1.00 Content of the Workshop: Intro to Robotics What is robotics? How we can use it in day-to day life. Scope of the workshop:- Using ATMega168  processors as bot-brain. Learning about the Arduino environment. Learning about c++ based processing language IDE. Learning about 4 channel RF control. Learning Arduino-Processing interfacing.          PC- Control theory Processing (An open source Electronic Sketchbook) Advantages and scope for robotics. Serial communications. GUI end user facility. Make Your own programs!. Controlling methods - Mouse,Pen tablet. Precision control- Keyboard.              Generic RF module:- Key to open source “hackable”  design. eg. :- Turbo - using the 5th channel. Using the Rf module for other purpose - E.g Controlling the home electrical system contro...

A bunch of these just made an entry into my IC box. S27C64A-20FA is a 64Kb CMOS EPROM (8Kx8), one of the Obsolete Electronic Component manufactured by Signetics. It comes in 28 pin ceramic Dual Inline package (DIP) with Quartz window. 

A device that comes in handy during Mountaineering/Trekking Difficulty Rating: 3/10 Motivation: Using AA pencil cell to power a torch is too mainstream & also power consuming. And if you are a Mountaineer, where torch-light is vital, replacing these cells becomes too much of pain in the ass. Instead, how about a torch which doesn't need cell replacement in the first place?? The chargeable torch-lights (china made), like this one, have become a commonplace in today's Electronics market. Commercial Torch-light (Not mine) But does anyone have a similar torchlight, which has lasted more than a year? So I decided to make one for myself, owing to its use during one of the Mountaineering adventures. My prototype It works just fine !!!!! Hardware: A small pipe, wheel, Long screw (for charging purpose), lots of duct tape, white paper (behind LED) Electronics: 4.8V Li-ion battery, Toggle switch, push-button switch, 9 high-power LED, Dynamo, PCB, 2 Capaci...