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  1. gorgon

    "Mechanical On/electronic off" switch component

    If this is a new design and you are making the hardware too, it could be very simple. If you use a bolt type lock, the key could release a lock flap on the door, and the door can be opened. It can not be closed again since it will be stopped by the bolt and stay open to the lock bolt is...
  2. gorgon

    Modbus master and slave on single micro controller!!!!

    The easiest way to get past this problem is to use interrupt routines for the receive and transmit to and from the UARTS. You process the records in the background, where you have more time. This is fairly easy as long as you have a full duplex communication. If you need to use half duplex...
  3. gorgon

    Mad resistor bands.??

    The problem with this picture is that there should not be a black at the end or a silver in the middle. Silver is a /100 value, but in the wrong position for a 5 ring component. If you discard the last black ring the value is 0.1 ohm 1%. Black is not a valid tolerance ring(last) or first...
  4. gorgon

    Science Project BrainTeaser Question

    This is the closest I came to solving the problem. The result is that the lamps will be in series when both are on.
  5. gorgon

    Microcontroller Programming

    The only universal programming protocol I've seen is JTAG and similar family types. This is normally not available for the smallest controller types, that use proprietary protocols and interfaces, as said before. And yes, there are development boards for most microcontrollers, with USB...
  6. gorgon

    PIC interrupt routine help

    There are some loose ends here. When you say 'simple pic programming' I assume you think of Assembly programming. You say pic, but not the type of chip you use. I'm not sure what you really mean when talking about 'enable an interrupt routine'. Can you expand on this a bit? If you want to...
  7. gorgon

    DC induction?

    In addition it is also an electromagnet.
  8. gorgon

    VGA Signal Interrupter Switch

    I would try to interrupt 13(Hsync) and 14(Vsync) first. Be aware that you should be carefull not to add too much cable lenght to the existing wiring, due to the timing and impedance.
  9. gorgon

    CRT monitor radiation measurement project

    You are definitly NOT talking milliAmpere in these cases, but microAmpere(uA). Since lethal current value is 20-30 milliAmpere(mA) through the body, you'll be dead long before reaching 300mA.
  10. gorgon

    Hoppy Roo Rear

    Happy New Year to all of you!
  11. gorgon

    Detecting voltage drop?

    And you are sure this is not a standard servo pwm signal? Normally this would be 1-2ms pulse every 12-20ms. From your number I would presume that is the case. center is 1.5ms and this works out to (1.5/12)*5V = 0.625V in pulsed average. Depending on your meter this should not be too wrong...
  12. gorgon

    What is the live and neutral wire from a "1" and "2"?

    Hopefully this is not the case, if you are outside UK there's a 50% chance to get it 'wrong' if the mains plugg is not polarized.
  13. gorgon

    What is the live and neutral wire from a "1" and "2"?

    As far as I know there is no polarity on the two power leads. The middle one is PE (yellow/green)(Protective Earth) The reason for nonpolarity is that these connectors(IEC C13/C14) are normally used together with a Schuko plugg, that is nonpolarized in most countries.
  14. gorgon

    eproms

    In addition to what Harald said, your eprom programmer also verify your programmed data and generates a checksum for the data and over the address range you program. If you write this down when programming the eprom, you can verify it later if you think something has changed over time.
  15. gorgon

    What is a dual gate MOSFET?

    I suppose that is true if you are too old to remember them too :D
  16. gorgon

    Merry Christmas and a happy new year

    Merry Christmas and a Happy New Year to all!!
  17. gorgon

    Help with checksums

    Since you've got the problem fixed, I suppose this is more of academic interrest to you. CRC-CCITT is a 16 bit polynomial checksum. In nature it is serial and the data is shifted into this with feedbacks from certain bits in the polynomial. If you have enough memory, the easiest way to...
  18. gorgon

    Help with checksums

    I assume you don't have any information on the protocol used here? Any description at all?
  19. gorgon

    Help with checksums

    It looks my solution was a bit premature. What is this device you are communicating with? As far as I can see the MT88E43B is just a modem.
  20. gorgon

    Mysterious diode identification help!

    Brainfart
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