krishnapconcepts Posted July 11, 2012 Share Posted July 11, 2012 (edited) The black box is the housing. The green bar will be wrapped with nichrome wire. I need help calculating how much voltage i need to run. The battery supply must be button cells. Im sorry for the bad explanation plz ask questions so i can further explain. The wire must be hot enough to burn Edited July 11, 2012 by krishnapconcepts Link to comment Share on other sites More sharing options...
PaulS1950 Posted July 13, 2012 Share Posted July 13, 2012 OK, I'll bite, What is it, what is the function? Link to comment Share on other sites More sharing options...
krishnapconcepts Posted July 14, 2012 Author Share Posted July 14, 2012 a lighter you could use in the wind they already have them out but i want to make my own Link to comment Share on other sites More sharing options...
Hemanth Posted July 16, 2012 Share Posted July 16, 2012 (edited) This is what I thought ... you can use I2R= Q , where Q is the amount of heat supplied per unit time to melt the nichrome wire , R is the resistance of the wire (you can measure it using a digital multimeter ) from this you can calculate the 'I' and using Ohm's law you can calculate the required voltage . since you need the wire to be red hot the heat supplied should be less than the heat required to melt it ..., so any voltage little less than the calculated one may get you the job done.... Edited July 16, 2012 by Hemanth Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now