# Thevenin Equivalent - Help needed

Discussion in 'Homework Help' started by sinbad, Feb 26, 2009.

1. ### sinbad Thread Starter New Member

Feb 26, 2009
3
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I'm currently stuck at an assignment where I have to calculate the Thevenin voltage for a circuit. I know how to do this for simpler circuits, but this one was too much for me to handle. I calculated the Thevenin resistance to be 5.2Ω, which I know is the correct solution. If someone could enlighten me to how I can find the Thevenin voltage I'd be grateful. A step by step guide would really make me happy

Mar 27, 2008
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3. ### sinbad Thread Starter New Member

Feb 26, 2009
3
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I appreciate your help. The problem is that the mesh-current method is not a part of our curriculum. So, basically we have to use another method to solve this. I've tried using the node-voltage method, which I assume is intended, but I'm not quite sure how to do it on this particular circuit.

4. ### The Electrician AAC Fanatic!

Oct 9, 2007
2,666
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Maybe the Vth could be easily found as part of finding Rth. Show how you obtained the Thevenin resistance, and we'll offer help with the rest.

5. ### sstbrg Active Member

Nov 29, 2008
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It's quite possible to use node analysis as well - you'll find the voltage on R5 right away.
You have 3 nodes there, which means 3 equations. If you have a nice calculator you can solve them quickly.

Oh, "not a part of our curriculum" - make it a part of your curriculum then. Loop analysis is a very good and easy technique, and you'll miss a lot if you don't learn it.