Greeting hgmjr!

But i already know the information that is there... it is not enough... i need more inside stuff on steganography... i know what is crogenics but need links that tell the latest advancement in the same... thx for you support...

take care

 

Greeting hgmjr!

But i already know the information that is there... it is not enough... i need more inside stuff on steganography... i know what is crogenics but need links that tell the latest advancement in the same... thx for you support...

take care

Sounds like you are in the advanced stages of learning steganography. As for Me, I'm on the outside looking in. Seems like I recall that it has something to do with hiding information in the form of text in the pixels in a digital picture or some such magic.

Take a look at amazon.com and see it they have a book that suits your advanced level. You should be able to peek inside one of their books to see if it has the kind of info you are looking for.

You may want to seek out a forum that deals primarily with the subject of encryption. Surely there is one out there that caters to encryption buffs.

hgmjr

 

Thanks hgmjr

there is one important help that i need.
that is the circuits and codes for the keyboard and display interface of 89c51.

will look into the book you said and will let you know... but just in case can you tip me the link to such a forum for encryption?

 

Try this forum.

www.antionline.com

hgmjr

 

the site is good for steganography have still to look into it deeply; and i haven't seen the book on cryogenics yet.

but what about the Keyboard and display interface hgmjr?

 

Greetings saleemsm,

I am not exactly sure what you are looking for in a keyboard interface.

I did find this keylogger design that looked interesting.

http://www.keelog.com/diy.html

hgmjr

 

Thanks hgmjr

it was helpful!

working on my project now... will start atleast with simulation... any suggestions on how to proceed with the project? shall i start with simulation or prototype?

 

If there is any sub-section of your circuit whose behaviour you are not certain, then you can simulate it just to convince yourself that it will perform as you expect.

Otherwise, I would just go ahead and prototype the design you have in mind.

hgmjr

 

thks hgmjr

sry that i couldn't repond any sooner. i had a chance to present a paper on my project and it bloopered... i did well i don't know why i was not awarded a prize... it had set me back by a day... will work on my project just now... i have a circuit for keyboard interface but i doubt its working... can you explain?

 

hgmjr this is the file i was talking about.

 

hgmjr this is the file i was talking about.

saleemsn,

I don't think your attachment was successful. Would you check to see if you can access the file?

hgmjr

 

its working hgmjr...
you have to download a bmp file. from rapidshare.com

 

please let me know about the circuit i want to know its working clearly i am not sure about the schmitt trigger's working here

 

please let me know about the circuit i want to know its working clearly i am not sure about the schmitt trigger's working here

The circuit appears to be set up to filter the output of the switch prior to the schmitt logic gate. It looks like a crude switch debouncer circuit.

What are you trying to accomplish with the circuit?

hgmjr

 

key board debounce...

understood the working now but the problem is why schmitt trigger? why not FET? and i think schmitt trigger has two inputs one reference and the other being the input which one of the two in input?

have a nice day

 

key board debounce...

understood the working now but the problem is why schmitt trigger? why not FET? and i think schmitt trigger has two inputs one reference and the other being the input which one of the two in input?

have a nice day

Actually what appears in your attachment is a 2-input schmitt trigger NAND logic gate. A schmitt trigger logic device is often used when the input signal is both a bit noisy and likely to have a slow rise-time and/or fall-time. The rise and fall time of the input to the schmitt trigger of your circuit may be fairly slow since the resistors and capacitor in your circuit form a low pass filter. Both inputs to the gate are identical and can be used interchangeably. The input hysteresis levels are fixed by the internal devices design.

A schmitt trigger input possesses what is referred to as "hysteresis".

Rather than try to explain hysteresis to you, I have provided a link to the AAC Forum Tutorials section that explains the topic.

http://www.allaboutcircuits.com/vol_4/chpt_3/11.html/schmitt

I suggest you review the material and then if you have any questions you can come back to this thread and post them.

A discrete FET could be used but it would entail a bit more design effort to get the input bias circuitry set just so and the output load circuitry set up. The use of a logic gate is preferable because it is available at a reasonable price and logic gates are easy to come by since they are made to an industry standard specification by many different semiconductor manufacturers.

hgmjr

 

I am sorry to deviate from the topic.

Thanks for the info hgmjr will look into it... but i have a good news to all of you...

I GOT PLACED IN US TECHNOLOGIES.

i would like to know more about the company so if you guys could lend me the info.

 

I am sorry to deviate from the topic.

Thanks for the info hgmjr will look into it... but i have a good news to all of you...

I GOT PLACED IN US TECHNOLOGIES.

i would like to know more about the company so if you guys could lend me the info.

Is this the company you are referring to?

http://www.ustechnologies.com/index.cfm

If so, you should be able to find some good information on their corporate website.

hgmjr

 

no hgmjr its US technology not US technologies. i found a site http://www.ustri.com/ finding information in it.

looking for more projects... may put a new thread soon.

 

Congratulations on your new job.

hgmjr