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Picking a power supply and breadboard.

Discussion in 'Electronic Basics' started by Thomas, Aug 9, 2004.

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  1. Thomas

    Thomas Guest

    Hi All,

    Can anyone recommend a power supply and broadboard combination.
    I am new to electronics and i have a book that gives you a bunch of circuits
    to build but it doesn't mentione anything about a power supply. The book
    mentions +5V power supply but that doesn't mean anything to me.

    Can anyone offer some insight?

    Thanks
    ~Thomas
     
  2. Tim Auton

    Tim Auton Guest

    Eventually you'll want a nice bench power supply where you can twiddle
    a knob and change the voltage, limit the current and select what kind
    of milk you want in your coffee. Till then a 9V battery and a 7805
    regulator will do just fine.


    Tim
     
  3. Thomas

    Thomas Guest

    I appreciate your answer, but i don't see how that helps me when i am using
    a breadboard and not a pcb to prototype my circuit. If you could please
    provide some more details i would really apprciate it.

    Thanks
    ~Thomas
     
  4. Tim Auton

    Tim Auton Guest

    Stick the pins of the 7805 into the breadboard. Stick the wires from
    the 9V battery into the breadboard too (connectors for 9V batteries
    with just wires on the end are common and cheap).

    Breadboards are laid out on a 0.1" grid. A fair number of other
    components, including the 7805 and other ICs (chips), are laid out
    with a 0.1" spacing between the pins. You can plug these into a
    breadboard.


    Tim
     
  5. L.

    L. Guest

    Heathkit and Conar offered a similar item - both can be found on E-Bay for
    decent prices.

    L.
     
  6. "Thomas
    I don't really care much for the protoboard, power supply
    combinations. They really jack the protoboard prices up and the
    supplies are not very good (not adjustable, fixed current limit, no
    metering).

    I have a collection of different protoboards of various sizes,
    including some of the modular snap together stuff, so I can build on a
    board that fits the project. I good starter supply would be something
    like the Elenco E-XP-581
    http://www.gibsonteched.net/exp581.html

    It has fixed +5 and +,-12 volt (three terminal regulated) outputs and
    an isolated 0 to 20 volt metered supply. It doesn't have all the
    bells and whistles, but it costs a third of what those do.
     
  7. Sorry, I meant Thomas, not Tim. At least I hope I haven't mixed up the
    names. I meant for the original poster to e-mail me.

    Also "Hands-On Electronics" published by Cambridge U. Press (not sure of
    author's name).
     
  8. andy

    andy Guest

    if you live in the uk, maplin electronics do a lead acid 6V lamp battery
    charger plus 2 batteries for not too much, which is what i've been using
    to practice with. (called 'powerpack' or something). The good thing about
    this is:

    a) there's no way you can electrocute yourself off a 6V battery. (Though
    you do need to make sure it doesn't short for too long)
    b) 2 6V batteries can be set up as either +6v, +12V, or +/-6V, which is
    useful for a range of different circuits.
     
  9. tempus fugit

    tempus fugit Guest

    As a newbie to electronics, probably the first thing you'll want to look at
    building is a variable bench power supply. However, until you're a little
    more familiar with how things work, it's probably safer to use a regulated
    wall wart. Even better (and cheaper), just get a normal wall wart with an
    output of about 8 - 15v DC, and use a 5v regulator. Take the output of the
    wall wart (watch the polarity - I assume you have a meter) and connect it to
    the regulator as shown in the datasheet downloadable from:
    http://www.fairchildsemi.com/pf/LM/LM7805.html
    (Fig. 8 on p.21)
    You can easily build this right on your breadboard and it is pretty safe,
    since no high voltages are involved. This will give you a regulated 5v
    supply up to about an amp.
     
  10. Gary Lecomte

    Gary Lecomte Guest

    Look at the Current and Voltage Regulated power supply on my site. Its
    Simple and Ideal for use with breadboard circuits . Build it and than
    buy sme breadboards.

    http://www3.telus.net/chemelec/Projects/Projects.htm
     
  11. Thomas

    Thomas Guest

    Thanks everyone, it's good to know that so many people are willing to help!

    This Electronics stuff is addictive...
     
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