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KMoffett

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  3. Need some interesting usage of electronics in agriculture

    in Electronics chit chat

    Posted


    Hi,
    Does anyone knows some of the amazing applications of electronics in agriculture?
    I'll be grateful if anyone could help me find some. Of course I need some technical (or detailed) information about those applications.

    thanks guys.

    One of the most amazing uses of electronics in farming to me is the real-time control of fertilizer delivery and planting based on variations of soil conditions and GPS location over a field.

    Ken

  8. 120V shorted out, why did the lights get brighter?

    in Electronics chit chat

    Posted

    Likely, you have less than good neutral connection at the service entrance box or the utilitie's transformer. In the US the service supply is from a 220vac center-tapped transformer. Half the circuits in a house are supplied 120VAC from neutral to one end of the transformer's secondary, and the other half are supplied 120VAC from neutral to the second end. If the  house neutral to transformer's center tap is lifted, the devices on the two circuits appear in series and become a voltage divider. If both circuits are equally loaded, each will see 120V.  But if not, the circuit with the lowest resistance devices (more heavily loaded) drops proportionally less of the 220V across its devices. The circuit with a higher resistance (less heavily loaded) drops more. So, when you short out one circuit, most or all of the 220V appears across the other circuit. The bulbs on the other circuit see a supply voltage much greater than 120V, get brighter, and then burn out. I saw this in my parents house.

    Ken

  15. e2u10

    in Electronics chit chat

    Posted

    Have you Googled: e square u10 chip

    u10 sounds like a 'schematic drawing label' for an integrated circuit chip, not the chip manufacturer's number.  From my Google-ing it looks like "e squared" may be a double-e prom...electrically erasable programmable read-only memory chip.  Do you have access to the schematic or to the circuit board? The equipment manufacturer should be able to give you the chip manufacturer's standard number for the component.

    Ken.

  19. Light bulbs

    in Theory articles

    Posted

    It looks like it was for a 100W bulb. It was just a general example of how someone used voltage and current measurements to determine the filament's resistance over a range of operating voltages.  And how the graphed data would look...if the OP tried it.

    ken

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