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	Science Forum Forum Index » Electronics » make a heating device with wires?  make a heating device with wires? « View previous topic :: View next topic »  Author Message advancedgeek Posted: Mon Jan 07, 2008 7:57 am    Post subject: make a heating device with wires? Forum Freshman Joined: 07 Jan 2008 Posts: 10 is it possible to make a device from scratch that emits heat using the mains socket? few examples are soldering torch and a heater but i want to make my own. is it possible? and is it possible to control how much heat it gives out? Back to top Harold14370 Posted: Mon Jan 07, 2008 10:24 am    Post subject: Forum Professor Joined: 13 Apr 2007 Posts: 1244 Location: Pennsylvania Sure, it can be done. Basically you would connect a resistor across the power supply and the power would be equal to the square of the voltage divided by the resistance. You could control the power level by varying the resistance or by connecting a transformer to vary the voltage. You would need to make sure the power can be dissipated without burning out your resitance element and you would have to make sure things are insulated to keep from shorting things out or electrocuting yourself. What do you want to make, a soldering iron or a space heater? Why? Back to top advancedgeek Posted: Tue Jan 08, 2008 12:44 am    Post subject: Forum Freshman Joined: 07 Jan 2008 Posts: 10 oh i just want to make a simple heater not for soldering or anything it can be anything like 1000-1500 degrees C and where do i get the resistor? and how much would it cost usually to buy one? and also the do i need to get a power supply or can i use the mains socket as a power supply? Back to top Guest Posted: Tue Jan 08, 2008 3:58 am    Post subject: You'll need to first know about safety and have a trained first aider standing by who can administer CPR whilst you are laying on the floor doing the "Electrical Break Dance" (well after he shuts off the 'juice' anyway) Look up resistance wire on the net then use a bit of maths to design a former which can hold the coil and has a free air dissipation equal to the power you wish to add to global warming. If you do not do this things could start to get too hot. Start with more wire than you first calculate (this will always make things safer and let you stand further from your deathray machine) then if not enough heat is produced you can begin to shorten the wire until you either achieve nuclear fusion or recreate the big bang in your electrical utility/fuse box. Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First     Page 1 of 1 Science Forum Forum Index » Electronics » make a heating device with wires? Jump to: Select a forum Natural Sciences----------------Astronomy & CosmologyBiologyChemistryEarth SciencesMathematicsPhysics People----------------Behavioral & Social SciencesHealth & MedicinePhilosophical DiscussionHistoryReligionPoliticsCriminology and Forensic Science General Technology----------------Computer ScienceElectronicsMilitary Technology Information Technology----------------Business & EconomicsEducationEngineering & Transportation International Issues----------------Environmental IssuesIn the News The Science Forum----------------General DiscussionIntroductionsScience-Fiction and Non-FictionExperimentationPseudoscienceLinksArt and Culture Site Administration----------------Site FeedbackTrash Can  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
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