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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Recent content by najeeb

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    Analyzing Parallel Port Data?

    Using sound card as an input device is a good idea. But is it possible with DC voltage input?.
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    Analyzing Parallel Port Data?

    Hi I have done a project which reads brain signals(EEG) and feeds to a PC. The software then plot the wave and analyse it. I developed the software in VB which can read parallel port plot, store and anlyse wave forms. This software uses a DLL developed in VC to read parallel port, direct...
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    Need sum help wid alot of computer engineering stuff plz....

    I thank Russlk for bringing out this mistake. Actually i wrote this from the information which i got from my school many years back. Today i checked it and realized what i quoted is WRONG. Also the use of a coupling capacitor will block DC and by pass AC only to the speaker. I didin't think...
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    Need sum help wid alot of computer engineering stuff plz....

    Re: Need sum help wid alot of computer engineering stuff plz A speaker is similar to a DC motor. have you ever applied AC power a DC motor? You can feel the vibration of motor (not rotation). On the other hand, if we apply DC it will rotate and the speed can be varried by varrying the DC...
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    ADC0808 problem

    dont' panic, you can do it! I too had problem with same ckt. But solved. What i did is just adjusting the offset level of input voltage. Check the offset of input signal Try to connect your ckt with a signal generator and CRO, you can solve it very easily.
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    Printing Circuit Boards?

    a) Purchase a coper clad sheet of requird size b) Take laser print of your PCB tracks in to a transparent film c) Go to a screen printer. Tell him to expose this on your Copper clad sheet d) Purchase Ferric Chloride e) Make a concentrated solution with the chemical f) put your PCB in the...
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    need help: serial port control interface using VB

    I am sory, this DLL is not capable of setting data bits and baud rate. If you want your program to customize serial port settings , i recommend MSComm control. My DLL is created to simplify the use of port in VB just like in C. You can fix the baud rate and data bits by windows controls. or by...
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    need help: serial port control interface using VB

    Just mail me at [email protected]. I can give u one DLL (develped in VC ) and VB sample code which can be used very easily. it looks as follows outport(portID, data) val=inport(PortID) where outport and inport are the functions definded in the DLL. this will work well with serial port...
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    How I should configure a parallel port to read data?

    Hi, Does any one can tell me how i should configure the parallel port for reading data from a circuit? I got a lot of information from the internet, but now confused by this after testing with different computer ports. I found some ports are working very well but not all. I want a unique...
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    Pls help me against SURGES !

    Hi , I want to know about protecting digital circuits from surges. Especially the counters. The surges leads to miss-counting. Pls read my situation: I am now doing the modification work of a paper cutting machine. What my plan is to computerize the machine. There is a moving gauge...
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