With Instructables you can share what you make with the world, and tap into an ever-growing community of creative experts.
We have a be nice comment policy. Please be positive and constructive.
We noticed you attached photosto your comment.
Suppose if I want to purchase the 15 milli Ohm resistor , when I am thinking about the Power Dissipation.
In my circuit,
Max expected current is 5A and maximum possible power dissipation,
Pd = ILoad (max)^2 * Rsh = 5A * 5A * 15 mOhm = 375 mW
Does it mean that the resistor I choose that should be more than 375mW ?
Because, Can I choose if the resistor 15mohm with 1W and 1% . In this case, should I consider this resistor or Can I use this resistor for my circuit with above given requirements?
you'll want to think in terms of your power supply, not the resistor you're using. For example, if you have 5V and 2A coming out of a charging cable then you have 5 x 2 = 10 watts coming into your circuit and you'll want resistors rated for 10w plus a factor of safety.
Electronics for Absolute Beginners, Chapter 2
How to change the resistance of a resistor with another resistor.
Electronics #1- Resistors
The weekend mechanic
5 Watt LED Bulb
DIY Power resistor
Resistance Substitution box (0 - 100 Meg Ohm Resistance)
DIY 12v car E-Cig / Box mod
Complete Guide for Tech Beginners
Posted:Apr 13, 2012
Join 2 million + to receive instant DIY inspiration in your inbox.
© 2016 Autodesk, Inc.