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Recent content by Archerman

  1. Archerman

    How much DC input will be enough to replace 5 x AA batteries?

    Re: 5 X AA batteries = ? It will be 5 x 1.5 = 7.5 volt
  2. Archerman

    MS-DOS command to shutdown computer

    I don't have win7, so I am not sure, but I think it should be : shutdown -s -m \\computername or use shutdown /? for your OS.
  3. Archerman

    How to Create energy ?

    This can be done by purely thinking about it. Very interesting material about this can be found at: **broken link removed**
  4. Archerman

    which is best routing algorithm?

    None of the above, after 20 years of building WAN's I would still go for OSPF. Here is a nice link on routing protocols: Cisco - Routing Protocols
  5. Archerman

    [SOLVED] Produce Flickering of Light Bulb

    You can use your 555 timer and then drive either a TRIAC, 2 SCR's, or a MOSFET. There is also light bulps available working on 32V if you don't want to use the 220V.
  6. Archerman

    How to transform 17 volts into 32 volts.

    You will not get 32V with a normal rectify and filter circuit from the 17V. You need to make use of a Voltage doubler circuit. It will look something like this :
  7. Archerman

    best PCB routing practices

    Normally I do the component layout on the board and then start the auto routing. Move the component layout a bit to compensate for obvious mistakes. Then auto route again. Most of the times you will see something will work better if on or other track was routed differently. I then route that...
  8. Archerman

    PIC 16F628A help for beginner

    You just need to increase your time delay loops, or the int values that you use in C. Also make sure you use the last hex file to be used in your programmer.
  9. Archerman

    [SOLVED] Help me start working on eye detection sensor project

    Re: Eye detection sensor The focusing of a digital camera is normally been done by IR. With any IR signal that is to long and too intense you will burn the retina. The exact amount will be different for different age groups, state of health, and a lot of other things. My suggestion is to...
  10. Archerman

    In the wireless network, why does interference cause collision and re-transmission?

    In data transmission when there is interference super impose on your data signal the result will be best explainable by the super heterodyne effect. In effect some of the data levels will be to low to be interpreted by the equipment causing some bit errors. The same as when the logic levels for...
  11. Archerman

    how to convert 12v 0.28A to 3.7v 0.55A

    Just make sure about the charging characteristics of the battery in question. Different technologies need to be handled different. To prevent an explosion a good practice is to always do heat sensing as well.
  12. Archerman

    pl anyone tell me about my doubt

    You need to use the instruction set for the LCD module. Typically you will do the following: 1) Let your processor enable the LCD module. 2) Clear the LCD. 3) Load the data into a buffer. 4) Send the data to the LCD to be displayed.
  13. Archerman

    where coil store energy??

    No, the coil doesn’t store the energy itself. If the magnetic field collapses the energy will be recreated in the coil in an opposite direction, because the magnetic field is in a different direction. Remember energy can not be destroyed; you can only convert the state or form of it at the most...
  14. Archerman

    EAGLE CAD dimension error when creating connector

    You get that when the track width is more that the diameter of the pad.
  15. Archerman

    automatic solar tracking system

    I would say us 2x LDR's, 1x PIC microcontroller, 1 x servo. Then use the hardware PWM in the processor to drive the servo.

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