Gist of Judgements
Hon'ble Dharam Veer Sharma, J.
Speed Controllers
Speed Controllers
1. Introduction
The purpose of a motor speed controller is to take a signal representing the demanded speed, and to drive a motor at that speed. The controller may or may not actually measure the speed of the motor. If it does, it is called a Feedback Speed Controller or Closed Loop Speed Controller, if not it is called an Open Loop Speed Controller. Feedback speed control is better, but more complicated, and may not be required for a simple robot design. Motors come in a variety of forms, and the speed controller's motor drive output will be different dependent on these forms. The speed controller presented here is designed to drive a simple cheap starter motor from a car, which can be purchased from any scrap yard. These motors are generally series wound, which means to reverse them, they must be altered slightly, (see the section on motors).Below is a simple block diagram of the speed controller. We'll go through the important parts block by block in detail.
Contactless Mains Voltage Indicator
Contactless Mains Voltage Indicator
This is a CMOS IC (CD4033) based circuit which can be used to detect presence of mains AC voltage without any electrical contact with the conductor carrying AC current/voltage. Thus it can be used to detect mains AC voltage without removing the insulation from the conductor. Just take it in the vicinity of the conductor and it would detect presence of AC voltage. If AC voltage is not present, the display would randomly show any digit (0 through 9) permanently. If mains supply is available in the conductor, the electric field would be induced into the sensing probe. Since IC used is CMOS type, its input impedance is extremely high and thus the induced voltage is sufficient to clock the counter IC. Thus display count advances rapidly from 0 to 9 and then repeats itself. This is the indication for presence of mains supply. Display stops advancing when the unit is taken away from the mains carrying conductor. For compactness, a 9-volt PP3 battery may be used for supply to the gadget
READ MORE
This is a CMOS IC (CD4033) based circuit which can be used to detect presence of mains AC voltage without any electrical contact with the conductor carrying AC current/voltage. Thus it can be used to detect mains AC voltage without removing the insulation from the conductor. Just take it in the vicinity of the conductor and it would detect presence of AC voltage. If AC voltage is not present, the display would randomly show any digit (0 through 9) permanently. If mains supply is available in the conductor, the electric field would be induced into the sensing probe. Since IC used is CMOS type, its input impedance is extremely high and thus the induced voltage is sufficient to clock the counter IC. Thus display count advances rapidly from 0 to 9 and then repeats itself. This is the indication for presence of mains supply. Display stops advancing when the unit is taken away from the mains carrying conductor. For compactness, a 9-volt PP3 battery may be used for supply to the gadget
READ MORE
AUTOMATIC INTELLIGENT TOLL -TAX
THIS PROJECT IS DESIGNED TO MAKE UNATTENDED AUTOMATIC TOLL TAX STATIONS AT CHECK BARRIERS OR OCTRI CHCK POSTS
Automatic toll tax project is designed ,using atmel 89c51 microcontroller & descreate componants. Heart of the project is an ir transmitter and receiver modules ,these strong powerfull modules transmits 38khz strong ir beam, has a range of more than 15 feets are sufficiently enough for our project. I have designed this project as a simple emplementation of the toll collection process automatically in a model form. This should not be considered as a real toll collection system which require much more considerations , tests and huge amount of money, before they are actually put into use.
READ MOREtouch switch
General Description
A touch switch is an electronic device that enables us to
control a circuit by simply touching a sensor. Smart Kit
1005 is a very easy project to built and will make you the
proud owner of a magic switch that will respond to the
slightest touch of your hand on its sensitive plates.
Supply voltage: 12 VDC
Max. current:30 mA
Relay rating: 250 V/2 A
READ MORE
UC Browser Download For Free
UC Browser Download For Free
Step1 Choose your mobile phone brand/model
Phone brand ：
If you are not sure of your phone model,
browse cell phone picture selection >>
If you can’t find your phone model,
download the generic version of UC browser >>
If you are not sure of your phone model,
browse cell phone picture selection >>
If you can’t find your phone model,
download the generic version of UC browser >>
The phone model you have choosed:
The phone brand you have choosed:
AVG 8.5.406  Description: AVG Antivirus Free Edition is a free antivirus. It gives you full protection of your system. It is easy to use, simple clicks needed. The software consumes low resources of the system... English - Freeware - XP/Vista Security > Antivirus  | |
 English - Freeware - 95/98/Me/2000/XP/Vista 308.4 KB Security > Antivirus | |
 Windows Live Messenger 8.1.0178  Windows Live Messenger is the next-generation MSN Messenger. It has everything you already love about Messenger—your contact list, emoticons, and instant access to your friends via text, voice,... English - Freeware - XP/Vista 18.9 MB Internet > Instant messaging | |
| Windows Movie Maker 2.6  Description: Windows Movie Maker is surprisingly easy and amusing for family realization of films, by allowing you to create, to edit and to share your films on your own computer by of simple slip... English - Freeware - 95/98/Me/2000/XP/Vista 7.4 MB Video > Video editing | |
| Real player Gold 11  Description: RealPlayer 11 gives you the ability to download videos from thousands of Web sites with just one click, and now you can even burn them to CD. Watch them whenever and wherever you... English - Freeware - XP/Vista 13.3 MB Audio > Playlists | |
| AntiVir 9.0.0.407 AntiVir is a free antivirus software designed for private use. Efficient and reliable, the program lists over 1,300,000 viruses, Trojan horses and worms. It analyzes each file created or read on... English - Freeware - 2000/XP/Vista 34 MB Security > Antivirus | |
| Media Player Classic 6.4.9.0 Description: Media Player Classic is a video reader taking back the appearance of the first version of Windows Media Player.Its very simple appearance hides a very successful reader recognizing a... English - Open Source - 2000/XP 2.2 MB Video > Video players | |
| Firefox 3.5.2 Description: Mozilla Firefox is a secure web-browser frequently updated and with Hundreds of extension, themes, etc. When installed, it also allows you to import your bookmarks from your old... English - Open Source - Me/2000/XP/Vista 7.9 MB Internet > Web > Browser | |
| iTunes 8.2.1 ITunes is a free digital media player application for playing and organizing digital music and video files. The program is also an interface to manage the contents on Apple's popular iPod digital... English - Freeware - XP/Vista 78 MB Audio > Podcasting/Streaming | |
| Nokia PC Suite 7.0.8.2 The latest version for Nokia PC suite , allowing you to connect and synchronize most Nokia Phones to your PC (Microsoft OS -based). Connectivity is achieved either using a USB cable or through... English - Freeware - 2000/XP/Vista 36 MB Drivers > Mobile/PDA drivers | |
| Bitdefender Free 2009 Description: Bitdefender free edition use the same scanning engines found in other BitDefender products, allowing you to enjoy basic virus protection for no cost at all. The software is very easy... English - Freeware - XP/Vista 66.7 MB Security > Antivirus | |
| PDF Creator 0.9.8 Supports Windows 7 Beta PDFCreator is a free tool to create PDF files from almost any application that can print. It also possesses options of security allowing to code the PDF to protect their... English - Open Source - 98/Me/2000/XP/Vista 17.6 MB Office software > PDF | |
| VLC 1.0.1 Description: VLC media player is a portable multimedia player for many video and audio formats (MPEG1, MPEG2, MPEG4, DivX, mp3, ogg, ...) as well as DVDs, VCDs, and various streaming protocols.... English - Open Source - 2000/XP/Vista 1.5 KB Video > Video players | |
| DirectX Vista 10 Description Lately released, DirectX is very well known worldwide. The application is useful only on Microsoft Windows Vista. It automatically optimizes the graphic cards based on processors... English - Freeware - Vista 305.7 KB Video > Codec | |
| Adobe Reader 9.1 Also compatible Windows 7 This tool is used to view and print PDF Files. English - Freeware - 2000/XP/Vista 26.7 MB Office software > PDF | |
| CDburnerXP 4.2.5.1490 CDBurnerXP is a burning software for CDs and DVDs, Blu-Ray and HD-DVDs capable. Create your ISO files for burning and also bootable discs. CDRurnerXP includes multilanguage interface and free from... English - Freeware - 2000/XP/Vista 3.2 MB Operating system > Burning | |
| OpenOffice 3.1.1 OpenOffice is a free office application suite, including a word processor, spreadsheet, presentation tool, drawing package and database, compatible with all other major office suites like... English - Open Source - 98/Me/2000/XP/Vista 157.5 MB Office software > Office suite | |
| SiS UniVGA2 Graphic Driver 2.22 Silicon Integrated Systems Corporation, driver UniVGA2 is a SIS universal Graphic Driver which supports the following graphic chips : SiS650, SiS651, SiSM650, SiS650GX, SiS740, SiS650GL, ... English - Freeware - 2000/XP 39.3 KB Security > Cookies | |
| ALZip 7.4 ALZip is the most powerful and the cutest compression utility available. Advantages: Open 36 Formats : ALZ, ACE, ARC, ARJ, B64, BH, BHX, BIN (HEX FILES), BIN (CD IMAGES), BZ2, CAB, EAR, ENC, GZ,... English - Freeware - 98/Me/2000/XP/Vista 6.9 MB Operating system > Compression/Decompression | |
| Drivers Realtek AC'97 Audio A4.06 REALTEK AC ' 97 Audio Codec & Driver for Windows 98/98 / / 2000 / XP / 2003 (32/64 bits) is compatible with the following audio chipsets: Realtek ALC100 Realtek ALC101 Realtek ALC200 Realtek... English - Freeware - 98/Me/2000/XP 18.7 MB Drivers > Audio drivers |
