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Found 1 result

  1. Hey builders! Recently I made a LEGO power functions laser (topic can be found here), and it got me thinking... what els can I build? That's how I came to the idea of making a LEGO electromagnet! Making it was actually a whole lot easier than making the LEGO laser. The LEGO laser required a 9 volt to 5 volt converter and reversed -polarity protection. The electromagnet was already made for 9 volt and it does not care about polarity. I just got the motor out and unhooked the 2 wires, then connected those 2 wires to the electromagnet and... it worked! I'm amazed by the strength of this small thing, under good conditions (unpainted, flat metal) it can lift up to 6 kilo's! I have no specific idea of how to use it in MOC but I'm sure I'll think of a good application for it. All suggestions are welcome by the way Tell me what you think ------------------------------------------------------------------------------------------------------------------------------------------------------------ BUILDING LOG weight: 78 gramscapacity: 6 kilo+ To make one yourself you need: PARTS: - a 9 volt electromagnet (ebay is a good source, I bought mine for 5.46$). - some glue (I used hot glue) - soldering tin & shrink tube TOOLS: - flathead screwdriver or prying tool - soldering iron -lighter (for shrink tube) First you need to open up the PF XL motor housing, this is quite hard. I found the best way is to squeeze it just a bit in a vice so the outer shell becomes oval and you can stick a small thin screwdriver in the gap to open it(mind the position in the vice!). This is what you will find on the inside: Disconnect the 2 wires attached to the motor, put the top half of the casing is a vice and dremel out the center rougly to the size of you electromagnet: Then make everything perfectly round with a small file untill the electromagnet fit's snug in the housing: After pressing it in the housing, get 2 lego beams and attach them to the 2 forward facing holes. this way you can make the magnet perfectly flush when mounted in a MOC: Then seal the electromagnet firmly in place using glue (I used hot glue). Next you solder the 2 wires coming from your electromagnet to the 2 wires that were attached to the motor (the inner 2 strands of the 4 strand LEGO wire, polarity does not matter). Make sure you use shrink tube to isolate both wires! Then glue the motor plate (holding the LEGO wire) in place and test the magnet! If it works close it up and you're done!! I hope you enjoined this build log, if you have any questions just let me know!