I wanted to design an inductor, so I googled the web for ages and found a few equations. But I am a sceptical old timer who trusts no-one! So I made a spreadsheet and entered 4 equations I found, and tested them with my data. And was pleasantly surprised that they all gave the same answer (give or take a few percent). But guess what: the online calculator at https://www.allaboutcircuits.com/tools/coil-inductance-calculator/ ... yes that's right, the one on this website, gives a remarkably different answer to the consensus of alternative opinion, being 10 times or so what it should be.
Can anyone confirm or deny this? My inductor is 133 turns, 50 mm diameter, 150 mm long, air cored. The majority place it around 250 to 300 uH, but not our calculator!
BTW I couldn't find our calculator in the navigation system, only by googling it. Is that because it isn't supposed to be available?
Can anyone confirm or deny this? My inductor is 133 turns, 50 mm diameter, 150 mm long, air cored. The majority place it around 250 to 300 uH, but not our calculator!
BTW I couldn't find our calculator in the navigation system, only by googling it. Is that because it isn't supposed to be available?