shaiqbashir Posted March 23, 2006 Report Share Posted March 23, 2006 Hi guys!well! i want a 5ohm-20watt power resisitor. First of all please tell me that whether this resistor is available , i mean that is this a standard resistor. And im having some problems finding this in the market. So please can anybody tell me some alternatives to this. I have heard from one of my friends that we can make a resistor according to our required resistance and wattage by using a coil wire by using the formula:R=pL/Awell! by this i can find a required resistance but how to find a coil of the required power. that is 20 watts.ur early reply shall be highly appreciated./take carezRegards, Quote Link to comment Share on other sites More sharing options...
ante Posted March 23, 2006 Report Share Posted March 23, 2006 Hi,If you need exactly 5 Ohms (this one is 25 W) and surface mounting is ok here is an alternative: http://www.elfa.se/elfa-bin/setpage.pl?http://www.elfa.se/elfa-bin/dyndok.pl?lang=en&dok=1775.htmIf you can live with 4.7 Ohms (standard value) you have many options.Hope this is helpful. Quote Link to comment Share on other sites More sharing options...
shaiqbashir Posted March 23, 2006 Author Report Share Posted March 23, 2006 Thanks ante! Quote Link to comment Share on other sites More sharing options...
MP Posted March 25, 2006 Report Share Posted March 25, 2006 http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?Ref=3031&Row=380100&Site=USMP Quote Link to comment Share on other sites More sharing options...
ante Posted March 25, 2006 Report Share Posted March 25, 2006 Hi MP,Something went wrong here I think? Quote Link to comment Share on other sites More sharing options...
MP Posted March 25, 2006 Report Share Posted March 25, 2006 It looks like they do not keep the search criteria in the link for very long at Digikey. Hmmm....I did not know it expired.It is a Digikey part number HLWB-5.0-ND. It is a 5.0 OHM 5% 20W TUBULAR Wire Wound Resistor @ US$ 3.38 for qty 1.Here is the datasheet from the manufacuter, Vishay.http://www.vishay.com/docs/30210/hlwnhlw1.pdfHope that is more helpful.MP Quote Link to comment Share on other sites More sharing options...
aartak Posted October 16, 2006 Report Share Posted October 16, 2006 Simply plug in parallel 10 resistors each 2Wt 50 ohm Quote Link to comment Share on other sites More sharing options...
spuzzdawg Posted November 6, 2006 Report Share Posted November 6, 2006 Putting the ten 50 ohm resistors in parallel would give you an equivalent resistance of 200 milliohms not 5 ohms Quote Link to comment Share on other sites More sharing options...
MP Posted November 6, 2006 Report Share Posted November 6, 2006 Looks like you forgot to 1/x your sum. I am assuming you used the parallel formula and came up with 1/50+1/50+1/50....etc and came up with a sum of 0.2. Answer is actually 1/x, thus 1/0.2 = 5. Correct answer is 5.MP Quote Link to comment Share on other sites More sharing options...
salman signals Posted December 29, 2006 Report Share Posted December 29, 2006 Nice Stuff. keep it up. Quote Link to comment Share on other sites More sharing options...
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