D art of science

sorry theres no step by step description since this is too difficult to show how to make....we've shown every part in the video and photos..and anyone who can make in terms of knowledge of materials and fabrication, will be able to use this visual information and make something like this

its also in the description of the video

Firstly the copper coil gets too hot and the circuit should be used for a little while at a time.our battery must have lasted only about 5 minutes in total.

Thanks. we're going to release the video on our channel next week if the edit is complete by then...it has everything including a fast forward of the assembly too.

dabash is this question for diy hacks or d art of science.anyways, while using relay you must have access to the wires so that you can insert them into relay terminals. i used servo and made smart fingers as they do not require access to wire. you just place smart fingers in front of an normal old switch and turn it into a IOT based smart switch.