1. The problem statement, all variables and given/known data I have a question to find the thevenin equivalent of a circuit (attached). I have found the Vout but am struggling when trying to reduce the circuit to just the Zth value. All the examples I have don't show an impedance between the terminals and I can't find any examples to try and follow through on how to reduce it. it doesn't help that I've got one book saying look at the circuit from the terminals side, and another saying work FROM the other side (where the Vin was and is now short-circuited) towards the terminals. This configuration is proving problematic for me. 2. Relevant equations Resistance series and parallel equations. Re = R1+R2 etc... Re = R1R2/R1+R2 3. The attempt at a solution I want to work this one out myself and don't want the answer (no point in blagging it if I can't do it again in the future!) but need some pointers. Can anyone talk me through how to reduce a circuit like this or point me to a webby with some good examples. I've seen a suggestion to use the left hand side in a 'star' config and convert it to a 'delta', but my books haven't covered these so I'm guessing there's another normal way to do it. I'm betting it's just staring me in the face, but I haven't done this type of thing for a good few years. Any pointers would be greatly appreciated!