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Thread: HNC elctrical/electronic Project

  1. #1
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    HNC elctrical/electronic Project

    right people im studying a HNC in elctrical/electronic engineering and we have to design and project that we decide. As i got this assignment months ago but couldnt think or anythinc suitable to do. Most of my ideas were either to complex or to simple. I have had a think and decide on designing some digital scales bearing inmind that i have to do this all in my own time.

    Now i havnt got a clue realy where to start and iv tried search on the net for some info on things im going to need but either im not very good at searching or there aint a great deal of info out there.

    Has anyone got a clue where would be a good place to start?

  2. #2
    is still on the road John Bennett's Avatar
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    Loads of car projects I'd love to do but never have the time.

    A nice one was a DET sensor circuit, as proposed in this thread:

    http://www.sxoc.com/vbb/showthread.php?t=127162

    I got halfway though a project to make some digital gauges using a PIC chip to sample signals (oil pressure etc) and display them as bargraphs on a 2-line LCD screen (20). You can have the PIC source if you want it . I had pictures of the unfinished unit, until my webspace went .
    '97 180sx with S15 SR20DET & 6MT + a few other bits.
    SXOC 'SX' sub-division long-timer.

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    the idea of that knock sensor sound very intereseting and also a worth wile project but im getting the feeling i might be step abit out of my depth. theres alot of reading there and im going to get though some of it and have a think.

    but i think that i just dont have the knowlege to come up with a good product.

  4. #4
    Member Matt_S's Avatar
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    Fcuk me. its moved on a bit from when I did my HNC!
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    I think for digital scales you would be looking at strain gauges. Then you would have to find a relation between the current output from strain gauge to the weight of the object. From what I remember you will need to use a strain gauge find away of converting the output to a digital display. I'm cant remember how you would do that. Hope I help a little.

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    Guest Scott D's Avatar
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    I seem to remember that there are circuits available (crystal based) that will give a voltage output proportional to pressure. all you need to do is A-D convert and get a suitable display!

    Reading this thread makes me realise how long ago my HNC was!

    Good luck

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    cheers for the help guys i thoguht that i would need a a-d converter. but i wasnt to sure on the strain gauge part a good place to start.

    although i'm liking the idea of the det sensor i dont think iv got the brains to be able to make it work. which is a shame

  8. #8
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    how many hnc in the club?

    aren't we all clever chappies.


    actually made my project the night before i handed it in. it didn't work, but as it had to be connected to 5 tonnes of chlorination power supply i had to simulate it.

    red led + 555 = pass, if the bullshit in the write up is good enough

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