/technologies/power-management/b/blog/posts/need-help-with-a-school-projectHello. I am currently a student and need help in the subject of electromagnetism. What can be the maximum weight a homemade electromagnet can carry given by the power source of a 2 x 1.5 AA Battery? Afterwhich, may I ask for the type of wire, core, aen-USTelligent Community 12https://community.element14.com/technologies/power-management/b/blog/posts/need-help-with-a-school-projectSun, 10 Mar 2024 14:45:19 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:6432fa61-3a76-444f-a22a-fc32effafbcbbeacon_dave1<p>Might be worth looking at salvaging a transformer from an old electrical appliance and turning it into an electromagnet.</p> <p>This microwave oven one is too big and heavy but it may give you some ideas:<br />&nbsp; &nbsp;<a href="https://www.youtube.com/watch?v=DT0QHsN3vcE" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">https://www.youtube.com/watch?v=DT0QHsN3vcE</a><br />Impressive result though.</p> <p>Perhaps choose your batteries wisely as some will be able to deliver more current than others.</p> <p>If it is more theoretical, then this may be of interest:<br />&nbsp; &nbsp;<a href="https://engineering.purdue.edu/~sudhoff/ee630/Lecture08.pdf" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">https://engineering.purdue.edu/~sudhoff/ee630/Lecture08.pdf</a></p><img src="https://community.element14.com/aggbug?PostID=27758&AppID=4&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/technologies/power-management/b/blog/posts/need-help-with-a-school-projectSun, 10 Mar 2024 10:19:46 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:6432fa61-3a76-444f-a22a-fc32effafbcbdougw0<p>Look up how much current your batteries can supply. Look up what is the smallest diameter wire that can carry that current. Based on the resistance of that wire calculate how much wire would it take for the resistance to be equal to the battery voltage divided by the current. Wind the maximum number of turns you can with that wire. Wind on a core that won&#39;t saturate. Calculate the inductance. Calculate the magnetic field. Calculate the force on the material you wish to attract.</p><img src="https://community.element14.com/aggbug?PostID=27758&AppID=4&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/technologies/power-management/b/blog/posts/need-help-with-a-school-projectSun, 10 Mar 2024 09:03:45 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:6432fa61-3a76-444f-a22a-fc32effafbcbM_G1<p>The maximum weight should be less than 200g and what are the possible size and shape of them?</p><img src="https://community.element14.com/aggbug?PostID=27758&AppID=4&AppType=Weblog&ContentType=0" width="1" height="1">