Recent content by sachooo

You can use any general purpose Op Amp such as uA741 as long as you don't need very high level of accuracy. Take care you need +12 & -12 Volt dual supply for OpAmp. Or you can use LM358 dual Opamp whis works with single 5 to 15 Volt DC supply.

Thanks You all for this information. In our project We are trying to attract & repel permanant magnet. To get max force we tried use high power permanant magnet & so we had this problem. But now I would like know what should be relative strength of both magnets sothat there will be...

We used simple mild steel but we observed this behaviour with permanant magnets too.

Recently while working with electromagnet , we noticed one thing. I we bring strong magnet near very weak PM or electromagnet, It will attract the weak one whatever is the polarity of magnets. we increased power to electromagnet then it was giving repulsion. I did't understand this...