1 & 5 Watt Resistors

Discussion in 'General Electronics Chat' started by Art, Feb 9, 2010.

  1. Art

    Thread Starter Distinguished Member

    Sep 10, 2007
    785
    61
    Hi Guys,
    How is a hobbyist likely to require 1 or 5 Watt resistors?
    I have a lot of them, but I've never had to use them, and don't
    know how I might use them. I don't want to throw them out and regret it though.

    What projects are likely to require them? Power supplies or radio stuff?
     
  2. cjdelphi

    New Member

    Mar 26, 2009
    272
    2
    Plenty of use for them keep them, they can get expensive them 5watt resistors, are they all random values? or specific groups... probably not all that great if they're all just 1 ohm resistors.
     
  3. Art

    Thread Starter Distinguished Member

    Sep 10, 2007
    785
    61
    Not random values. I mean heaps of them:
    [​IMG]
    So much so that it takes up a lot of space.
    What sort of project would you use them for?
    I have make heaps of kits, and designed a lot of digital circuits and never used them.
     
  4. cjdelphi

    New Member

    Mar 26, 2009
    272
    2
    wow....

    I have make heaps of kits, and designed a lot of digital circuits and never used them.

    if you make kits and design them it sounds like you have more than just lots of resistors, did you rob an electronic store? lol i bet you got > $10,000 there..... depends on what IC's you also have just sitting in boxes. open an ebay shop?... any Voltage Regulators or DC to DC IC's?....
     
  5. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    They make great heaters... seriously.

    They are also good for high power LEDs, at least the low values are.

    If you ever make a home made power supply you will be very very happy, you have to test it out somehow.

    Need I go on?

    I think my method of resistor storage is more compact. Something you might consider...

    http://forum.allaboutcircuits.com/showthread.php?t=12341
     
  6. russ_hensel

    Well-Known Member

    Jan 11, 2009
    818
    47
    If you just do signal processing you will not use them much. Power designs do, but less so as we have gone to pwm and similar methods. Low values can be useful as current sense resistors in power supplies and power amps.
     
  7. Art

    Thread Starter Distinguished Member

    Sep 10, 2007
    785
    61
    Maybe ok for those quantities but if I took these out of their factory bags and
    put them in a bunch of smaller bags it would make the whole thing much bigger.

    [​IMG]
     
  8. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    I disagree strongly, but that's OK. I have a full kit of 1/4W resistors, from 1.0 through 10M (over 150 values of resistors) in a 1 Gallon storage bag. Your quantity is much larger, but it could still fit in a banker box and still be highly organized, a much smaller footprint. Beats getting rid of them.

    Looking at the labels, what money symbols does OZ use? I see cents (¢), do you use dollars ($) too?
     
    Last edited: Feb 9, 2010
  9. Art

    Thread Starter Distinguished Member

    Sep 10, 2007
    785
    61
    Yes we have Australian dollars, they were still selling some resistors as singles so they were 6 cents each.
    They were just starting to come in with packs of six or eight, so some are already
    packed that way, but they are all 1/4 Watt.
     
  10. lmartinez

    Active Member

    Mar 8, 2009
    224
    6
    Nowdays with efficiency in mind, I am not sure why they would be utilized in an electrical circuit. Except as a heater device.....
     
  11. cjdelphi

    New Member

    Mar 26, 2009
    272
    2
    They're all from DickSmith

    www.dse.com.au

    how did you get them exactly? liquidation? and are they any other components other than resistors there?
     
  12. Mike33

    AAC Fanatic!

    Feb 4, 2005
    349
    25
    Great for tube amps!!!!!!!
     
  13. Art

    Thread Starter Distinguished Member

    Sep 10, 2007
    785
    61
    Good pickup there :) It sounds like you are from Australia then.

    Yes it's every component that they had in towers, semiconductors resistors, transistors,
    caps, trimpots, pots, LEDs, LED displays, thermal fuses, IR LEDs and receivers.

    Everything they had in hanging bags or on a shelf in little boxes I did not get
    (switches, pushbuttons, PCBs, IC sockets, etc)

    Dick smith are converting all of their stores in a way that no longer supports hobby electronics.
    They will (store by store) become a comsumer electronics retailer.

    I made an offer at the right time that a store was being converted to buy the stocked towers.

    I used my first 1/2 Watt resistor last night.
    I have a project microcontroller driven web server that is run on 3.3 Volts.
    I made an addon circuit for it that wants 5 Volts.
    The whole thing is run with a regulated 6 Volt plugpack, and a regulator is used to
    provide 3.3 Volts to the web server.
    I used a 1R2 1 Watt resistor to connect the addon circuit directly to the
    inside terminals of the socket that receives the 6 Volt supply.
    I just chose that value because it dimmed an LED backlight in the circuit
    to approx the same brightness as if it was being run on 5 Volts.
    http://www.freewebs.com/defxev/WIB.htm
    I wouldn't have been able to use a 7805 circuit with only a 6 Volt supply.
    Art.
     
  14. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
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  15. retched

    AAC Fanatic!

    Dec 5, 2009
    5,201
    312
    Yup. Get a dremel-type tool, and you'll never have to buy another resistor....for awhile..
     
  16. Art

    Thread Starter Distinguished Member

    Sep 10, 2007
    785
    61
    Lol, I stumbled onto that one on my own :D it's a cracka.
    I've got all the 1/4 Watt resistor values as well, I don't have to try to make them,
    and know what I can do with them.

    No sure what the idea is exactly, first thought is mentioned above,
    but a better idea is to just send the poor **** enough 1/2 Watt resistors
    to allow them to take a couple of days a week off work for a few months.
    Better use than I have for them :)
     
    Last edited by a moderator: Mar 5, 2010
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