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  • Users: Ejaz
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  1. Ejaz

    Finding the Mean Value

    I've written the following code to calculate the Mean Values of x, y & z. *************************************************************** for i=2:size(A) % A = column of input data x(i) = % formula y(i) = % formula z(i) = % formula end Mean_x=mean(x); % mean...
  2. Ejaz

    Request Matlab codes for noise & shading correction of Image

    I desparately need Matlab codes for noise & shading correction of 16bit tiff file captured with an experimental digital camera. I have three images: One is the noisy original captured image, one is the dark noise image (black) taken with the camera shutter closed and the other is the white...
  3. Ejaz

    Working with 12 bit tiff image saved as 16 bit image

    The captured image from a camera is 12 bit but saved in the computer as 16 bit tiff image with postfix '0' bits. During capture, the pixel values don't exceed 4095 as should be with 12 bit images. But after saving the image and openning in Matlab, the "imview(image)" command shows 16 bit values...
  4. Ejaz

    Need help on Matlab image processing!

    I'm capturing raw images from an experimental CMOS digital camera. However, this camera doesn't have RGB masks on the CMOS. Instead, the CMOS is monochrome. An instrument with camera lens is fitted infront of the CMOS that has four apertures so that the input image on the CMOS screen is divided...
  5. Ejaz

    Relay driver circuit with timer

    Using a 555 IC for a 10 minute ON/OFF timer requires a large size of capacitor. Isn't there going to be a problem?
  6. Ejaz

    Relay driver circuit with timer

    I need to drive a miniature relay with maximum coil voltage of 5 V and minimum coil current of 200 mA by a timer circuit. The circuit need to turn it ON & OFF every 8-10 minutes. Please help! Thanks in advance!
  7. Ejaz

    How to program an EEPROM?

    I have a multiplexer circuit that I built to control the main circuit but it makes the circuit very large because of large numbers of dicreet ICs. I want to do the timing by EEPROM but I don't know how to program one and what do I need other than the EEPROM IC. Please advise!
  8. Ejaz

    Need a simple telemeter circuit

    Could anyone please help me with a circuit!
  9. Ejaz

    Need a simple telemeter circuit

    Yes, that's my main concern.
  10. Ejaz

    Need a simple telemeter circuit

    It's a sensing system for patients that would lit an LED when there is 1. At present it's built as a compact system as an experiment. I would like to separate the indicator part from the main circuit so that the indicator can be placed somewhere else, for example nurse stations. I've asked for...
  11. Ejaz

    Need a simple telemeter circuit

    I need to use it to transmit data (0 OR 1) to 5-6 meters away. Could anyone please help! Thanks in advance!
  12. Ejaz

    Need a Transmitter-Receiver circuit

    I made a mistake. The signal is a 500 hz pulse, not square wave.
  13. Ejaz

    Need a Transmitter-Receiver circuit

    I have designed a sensor in which light from LED (main) is detected by a Photodiode (PD). The received signal is then filtered and is made to flash an LED (indicator) when the received signal goes above a threshold voltage. The main LED is driven by a 500 hz squre wave signal. This whole thing...
  14. Ejaz

    Need a Transmitter-Receiver circuit

    I need to transmit a 500 hz square wave without interference upto a distance of 50~60 meters that has to be picked up by the receiver at the other end. For this I need to have a transmitter-receiver circuit. Could someone plz help with a schematic! Thanks in advance!
  15. Ejaz

    Need to design a Photodiode amplifier circuit

    I need to build a circuit using Photodiode that will receive light from ultraviolet incandescent lamp (50/60 Hz line voltage), amplify and filter the signal and give dc output depending on the amplitude of the light. I'll be using an ultraviolet Photodiode for this purpose. Any help would be...
  16. Ejaz

    How to keep an LED ON even after the voltage drops to zero?

    I need to use an LED in such a way that the LED will lit when the voltage across the LED is sufficient to lit it but the LED will remain lit even after the voltage across it drops to zero. Is there any simplest way to do that?
  17. Ejaz

    Need a Timer Circuit to Drive Multiplexer 4051.

    Hi laffalot! I've been on leave since Dec 20th and just returned. My e-mail is ejaz@mail.vbl.shizuoka.ac.jp
  18. Ejaz

    Need a Timer Circuit to Drive Multiplexer 4051.

    THANKS A L...O...T!!! I browsed through your homepage. Nice layout. But I couldn't get access to the details of the circuit saying I was forbidden to access. Keep up the good work!!!
  19. Ejaz

    Need a Timer Circuit to Drive Multiplexer 4051.

    Thanks!
  20. Ejaz

    Need a Timer Circuit to Drive Multiplexer 4051.

    Hi Laffalot, I've bought the CD4060 counter but can't figure out how to make it LOW for the first 90 secs and HIGH for the 10 mins. If I use Pin 11 as the CLK input the circuit triggers on the negative edge of the pulse. However, if I use Pin 10 (OSC') and ground Pin 11, it triggers on the...

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