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  1. Dido

    LED Display digital clock project

    AN920, thanks for your comment  :) I decided to build the second circuit the one using a crystal oscillator, I have got another question, I think that I will need a frequency counter in order to adjust the trimmer capacitor to the right value, what`s the use of SA in this circuit: I can`t...
  2. Dido

    LED Display digital clock project

    Hello, I want to make myself a digital clock using LED displays as readout, I`ve been searching for some schematics of clocks, there are lots of such in the internet, but I still couldn`t find a reliable one. I don`t want to use a microcontroller, I want the clock to be made with CMOS or TTL...
  3. Dido

    Vacuum Fluorescent Tube driver

    Dear friends, I have built many times the LED Display Digital Voltmeter project and it works pretty fine. Now I want to build myself a Digital Thermometer using this voltmeter, but I want to use seven segment Vacuum Fluorescent Tubes instead of using LEDs. I have a small problem in constructing...
  4. Dido

    BIG LED Clock project

    Hi, I am planning to build myself an electronic clock with a big and bright LED display. I looked over the net and I found out that the schematic that I have attached is the perfect for me and I just thought that you`ll be interested in it too. The only problem I have is that I can`t find a...
  5. Dido

    Cleaning the CCD sensor of a digital camera

    I opened my camera but I haven`t tried propanol I tried blowing on it ant it worked now I haven`t got any problems at all but I am stiill not sure about propanol. I think that it is suitable for heads or other devices but it is not suitable for optics and optical devices. ??? ??? ???
  6. Dido

    Cleaning the CCD sensor of a digital camera

    hi prateeksikka are you sure about propanol? have you ever had such a problem? ???
  7. Dido

    Can I run two regulator circuits off one transformer secondary?

    Hi Trigger, as you can see he is talking about a digital meter, and the meter won`t blow if you short circuit it`s supply so this is not the problem. BTW: there are analogue meters which can measure both positive and negative
  8. Dido

    Can I run two regulator circuits off one transformer secondary?

    Hi RDL2004, If you have shorten the 5 V supply then the meter shouldn`t have blown up, maybe there is wrong something else, try to investigate all the circuits maybe something has unhooked.
  9. Dido

    design PCB using EAGLE

    Hi badai, Some printers have such possibilities to print in a mirror mode, this depends on the driver you use and of course the additional program that you have installed with your printer. Myne is Epson C82 and when I print for myself PCB`s I just set it to mirror mode from the preferences...
  10. Dido

    laser idea

    What do you mean with that 20K nanometers?
  11. Dido

    Cleaning the CCD sensor of a digital camera

    Hi Ante, Trigger I have opened my camera I even dismounted the lens and when I saw that I`m inexperienced working with optical devices such as object-glass, lens etc.... I pieced it together again. I went to the local service and he told me that he can`t do anything with my camera because he...
  12. Dido

    Cleaning the CCD sensor of a digital camera

    I`ve got a problem with my digital camera and It really freaks me out when I see that the photos are miserable and scruffy.  ;D   So let me explain you the real problem. A month ago I realised that when I shoot a picture and then I view it on my PC I see two spots on the picture. The first...
  13. Dido

    COMPUTER SYSTEM

    Look at these links they might be useful ! ;D ;D ;D http://www.quatech.com/support/comm-over-isa.php http://www.quatech.com/support/comm-over-mca.php http://www.quatech.com/support/comm-over-pci.php http://www.quatech.com/support/comm-over-cpci.php...
  14. Dido

    What is your favorate programing language?

    1. Visual Basic 2. Quick Basic 3. Borland Pascal
  15. Dido

    COMPUTER SYSTEM

    The difference b/w an ISA slot and a PCI slot is that ISA slots are 16 bit and PCI slots are 32 bit. ISA slots are used in old computers thay are long usually black coloured but you should know that ISA slots are no longer manufactured.For more info try to search in google or sth.
  16. Dido

    LC 8922 datasheet

    Hi I can`t find the datasheet for LC8922 IC I`ll be very grageful if you can help me! :)
  17. Dido

    Need help with a DMM

    I have a problem with my DMM. I OverVoltaged it It can mesure up to 1kV I measured maybe 5kV with it. Now It displays on the 3.5 LCD Display just the number 1 whatever I try to measure Ohms Amps Capacitance frequency etc... I opened the multimeter and I saw nothing interesting there five or six...
  18. Dido

    Led display Digital Voltmeter question

    I`m planing to do this project I read your discusses ::) and even now I can`t understand if the PCB given here in the article is OK I hope so beause I`ve already etched it.
  19. Dido

    My computer is slowing down!!

    Try to make a full repair (not reinstall) just repair that`s what I usually do. Windows XP is rubbish all stuff which iz made by Microsoft iz junk
  20. Dido

    ultrasonic mosquitoes repeller

    Here Is the circuit I`ve been using for one year.The mosquetos can`t got used to is because I`t changes It`s frequency all the time so the mosquetos can`t get used to it It`s efficiency is better in dark areas. for the beeper you can use beeper 400ST - a 40Khz working frequency for the...
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