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  1. gg4rest

    Radio Frequency Communication (RF)

    I don't know if their indian language site works better, but none of their links on their english site work so I can't give you much information on that. Are you creating a PCB? Wireless, from what I've heard, is difficult to make reliable for a hobbyist. Especially if it isn't on a PCB. I've...
  2. gg4rest

    Help needed for storage device

    Most microcontrollers have a serial interface. You connect this to a MAX232 chip (or equivalent) in addition to some capacitors (check the data sheets). This chip is available through samples from many companies. It basically does the level conversion from the micro to the PC. You then connect...
  3. gg4rest

    Help needed for storage device

    You will also need an instrumentation amplifier (like an INA338 from TI) before the UAF42 ICs. The signals will go from the sensor to the instrumentation amplifier and then to the UAF42 filter and then to the microcontroller. I've never interfaced to a flash drive before, I just would output to...
  4. gg4rest

    sugar level detector

    So what you are thinking of is a blood glucose monitor. Most of these currently extract blood from the person and test it using some sort of sensor. Doing a quick search I did find one non-invasive one that used photonic measurements of the eye to determine blood sugar. Some use Spectroscopy. It...
  5. gg4rest

    sugar level detector

    Do you mean its concentration in a liquid? Or how much granular sugar there is in a container?
  6. gg4rest

    Help needed for storage device

    I went to the University of British Columbia in Canada. Does the piezoresistive sensor actually measure force or are you trying to correlate the angle of the piezoresistive sensor to the force? As I recall, piezoresistive sensors change their resistance with angle of bending which doesn't...
  7. gg4rest

    Help needed for storage device

    So are you actually measuring the electromyogram signal (the electrical signal sent to the muscle)? If so, this is similar to my MASc. So I'll be more than glad to help out. What university do you go to? I need some more answers to help you. Are you sure the signal isn't bipolar? EMG signals...
  8. gg4rest

    COLOUR T.V

    My TVs all have only 2 prongs.
  9. gg4rest

    Radio Frequency Communication (RF)

    So you decided against a wired link? Texas Instruments has the ICs you are looking for. I don't know if they supply sample parts to India though...
  10. gg4rest

    Voice-Activated Door Opener

    Hi Garvey, You may want to contact that company and ask their pricing for 1 or 2 chips. They say $2.40 and $3.85 in quantities of 100K but you won't be using anywhere near that amount. It might be too costly. Do you care if different people can say the phrase and gain entrance? Or can it be...
  11. gg4rest

    Help needed for storage device

    I assume you want to record the voltage as well as display it right? Anyway, to do this you will require several things. 1. A low pass filter (LPF) and amplification 2. An analog-to-digital converter (ADC) 3. A microcontroller (and some sort of flash memory) or a connection to a PC. The low...
  12. gg4rest

    COLOUR T.V

    There is high voltage inside a TV set to launch the electrons through the CRT with enough velocity to cause the phosphor coating to light up. There is also a high voltage for the steering coils to cause the electron beam to curve to allow it to hit the top and bottom rows of the set and to scan...
  13. gg4rest

    sensors:pre final year engineering mini pojects(urgent)

    This site lets you search for various types of sensors. Most manufacturers will have datasheets for the sensor you are using and likely has circuits in their applications notes. http://www.globalspec.com/ As for books, "Principles of Engineering Instrumentation" by Ramsay has general...
  14. gg4rest

    sensors:pre final year engineering mini pojects(urgent)

    The easiest and probably cheapest examples I can think of are using velocity sensors or accelerometers to control DC motor speed. If you want to get more complicated, you could use some position sensors as well and use two motors and a couple of linkages to make a simple planar robot. Depends...
  15. gg4rest

    AM to FM convertor

    Hi audioguru, Where abouts do you live? When I drove from Vancouver to Calgary, there were no FM stations once I left the two major cities. So I was forced to listen to AM because I forgot to put songs on my mp3 player. It was kind of funny because there were some religious talk shows and funny...
  16. gg4rest

    square to sine convertor

    Thanks for the appl note audioguru. That one is very good.
  17. gg4rest

    square to sine convertor

    Here is a good article I found on constructing sinewave oscillators. http://www.web-ee.com/primers/files/AN-263.pdf Hope it helps.
  18. gg4rest

    AM to FM convertor

    There are many reasons here in Canada. FM stations focus on cities and doesn't travel as far so you cannot get those stations in remote areas. Plus in the mountains, it is virtually impossible to get an FM station while driving. If your car radio doesn't have AM (or a casette/CD player), you are...
  19. gg4rest

    What is VLSI and Embeded System Exactly

    VLSI is very large scale integration. It is likely that you won't be doing much with that since that is basically laying out your own ICs (what is in the chip). I did some in my undergrad but if you really want to get into it, most of it is PhD work from what I've seen. For an embedded system...
  20. gg4rest

    need information

    Do you want to know how they work? What ICs are there with op amps in them? How to use them to create amplifiers?
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