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Recent content by maged541946

  1. maged541946

    Adding comments to Zip files

    Depends on how you create your zip file, do you use a special code from a to z or use a dll file or third party file like 7zip...
  2. maged541946

    what language should I use?

    Sorry I had it reversed, actually having maicro controller on the machine helps in 3 things 1- Allow for stand alone operation while still get better user interface when needed. 2- Very much less expensive and safer to have majour jobs done by a micro, unless you switch to a stable operating...
  3. maged541946

    what language should I use?

    There are several reasons to do this, to name a few 1- Managing a CRT display is difficult, unless you use LCD display then the output is limited to a few lines. 2- Handling a printer will give a primitive job,while on PC you have a lot more power to print. 3- Error reporting is limited to a...
  4. maged541946

    Hi Resitance Short

    Thanks to you too Maged A. Mohamed http://magedm.freeyellow.com http://www.magedsoft.com
  5. maged541946

    Public Arrays

    Hi, Dim Fnu As Long 'File Number Open FileName4Array For Binary As Fnu Put #Fnu, 1, ArrayName() '1 is starting location 'for saving see "PUT" help Close Fnu ' to read Open FileName$ For Binary As Fnu Get #Fnu, 1, AnyArrayName() Close #Fnu 'Now "1"...
  6. maged541946

    Alternator design

    Hi,It depends on the model, they all are coil(s) rotating in magnetic field which results in AC not DC, then the use a way or another to make it DC, so you may find yourself using one coil from the set in the device, this will reduce the power out, or you may get a frequency changing with speed...
  7. maged541946

    Hi Resitance Short

    That happens when contacts either get oxides as a result of arcing during make/break actions or wear out, the contact will have higher resistanse due to contact area reduction due to non uniformitty of contact surface or oxide on contacts, as the same current must flow in them (normally...
  8. maged541946

    Will this RS485 network work

    Here we have 2 points, the operation and noise. From operation point of view, it will work because RS485 detects the voltage difference between the two lines rather than the absolute value, mathimatically,GND voltage will be cancelled out from the equation, I saw several circuits use this way...
  9. maged541946

    tri-state bus

    wire OR is when 2 or more Open Collectors are active in the same time on a wire or buss, without enable you can not expand memory chips for instance... In T.I. TTL data book the 74/54 TTL series, they have data sheets for the following ( 74L LS and S are ommitted from part number) 440 Non...
  10. maged541946

    tri-state bus

    There is another difference between Tri state and open collector. If you disable an open collector, it defaults to Logic Hi due to resistor pull ups, and there is no way (without using a set of inverters) to default it to low, however when a tri-state is disabled it is high impedence which...
  11. maged541946

    Capacitance Meter

    .1 pf resolution, you did not say what accuracy, eg if you display 2.1 pf is it +/- 1 count (+/- 0.1pf) or less than that....? now what is your maximum range, you then deside on high quality crystal to do the job the major problem would be the wire capacitances because it is in the range of few...
  12. maged541946

    hp 650c not printing all images

    please state your operating system, how is it configured (virtual memory, spool or anythimg that relates to memory or application,..) what software you print from some can handle large data, some just give this error, actually "out of memory" is like saying "Tired" but does not say who is tired...
  13. maged541946

    pressure-sensitive switch question

    It is a switch that change state at a pre set value of pressure, you need to know, if your old swith is sigle pole double through i.e. normally wire 1 is connected to wire 2 then when activated, wire 1 goes to 3 or the extra wire is earth. One important thing is snap action, the pressure switch...
  14. maged541946

    transformer

    If you have not any idea about your transformer, you can know your limits from its phisical dimensions. The transformer is either small or big. If it is small, so you can load it and measue, you can use an oscilloscope to display the output waveform. Connect the transformer, increase the load...
  15. maged541946

    Resistors before LCD logic lines

    I can't tell about flicker, you are the one to deside.. Flicker starts to be obvious if updateing is less than 16 times per second, so according to your code (jobs the pic has to do) then if there is time to write all displays 20 times per sec (once each 50 milli sec) note you can sandwitch the...
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