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Random Component Selection, Power Supply Building, and General Electronics

Discussion in 'General Electronics' started by Extrarius, Aug 28, 2004.

  1. Extrarius

    Extrarius Guest

    I'm new to electronics in that I've never actually built anything
    before (I know the basic theory/forumals though, and have drawn up
    schematics, etc, but I've never actually built anything), and recently
    I have become interested in electronics as it applies to
    microcontrollers.

    I'm fairly certain I'll have no problems with the microcontrollers
    themselves(the PIC12F675, PIC16F877A, and PIC18LF4539 for now) since
    I've done assembly programming on several platforms before and the
    data sheets from microchip seem to be very complete with respect to
    programming. However, the electronics part is giving me some problems.

    My primary problem is that I don't have any parts at all since I've
    just become interested in electronics. I do have the extreme basics -
    some assorted resistors, LEDs, a multimeter, a breadboard, and some
    wire. I need some help figuring out what other components I'll need to
    do general tinkering with the PIC-based circuits.
    I'm guessing that for simple projects, I'll probably need some
    capacitors(of various values - which ones are common in digital
    circuits?), some transistors, maybe some more resistors, maybe an LCD
    display for graphical output, some resonators/crystals to drive the
    chips, and maybe some various other ICs(like what? perhaps a
    multiplexer, maybe some 555 timer chips, anything else?).

    My breadboard doesn't have a power supply, since either a breadboard
    with one or a sepearte unit were both too costly (at >$100). I'm
    looking into 'building' one using an AC Adapter (or rechargable NiMH
    batteries, but they cost much more), but really I'm not sure how I
    would use it. I'm guessing that I'd need whatever kind of socket it
    plugs into so I could hook it up to the breadboard, and probably also
    a voltage and current regulator (I'd prefer the adaptor provide more
    of each than the circuit requires just to be more tolerant to slight
    changes - would that really even help?). I'm guessing using regulators
    means I'd also need the components from the regulator IC's data sheet
    to build each regulator circuit (the regulator I found only does one
    or the other function so I'd need two). Is this at all the proper way
    to go about this? From the PICs data sheets, the desired volage is
    4.2V to 5.5V with a desired 10mA if I'm reading it correctly, but I'm
    not complete sure I am (they're on microchip.com if you'd like to look
    and help me with this).


    In summary, I'm looking for any good
    pointers/information/resources/books/websites/etc on what inexpensive
    parts are good to have when tinkering with PIC-based circuits, on how
    to build an inexpensive power supply for such projects, and any other
    general information on electronics/digital circuits that you think is
    important.

    PS: If you reply via electronic mail, include "sci.electronics" (with
    or without the quotes) in the subject or it will get filtered to the
    trash.
     
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