Get 50% off your first month of ANY crate by going to http://KiwiCo.com/ElectroBOOM . Thanks to KiwiCo for sponsoring this video.  Also, a broken hair dryer doesn’t need to go to waste! My new MERCH: https://electroboom.creator-spring.com Thanks for your support @ http://patreon.com/electroboom Post your submissions to: http://reddit.com/r/electroboom My Facebook: http://www.facebook.com/ElectroBOOM My Twitter: http://twitter.com/electroboomguy My other articles: https://www.electroboom.com/ Thanks to http://CircuitSpecialists.com and http://keysight.com for proving my essential lab tools and giveaways. Checkout my Amazon picks (my affiliate link): https://www.amazon.com/shop/Electroboom Below are my Super Patrons with support to the extreme! Nicholas Moller at https://www.usbmemorydirect.com Sam Lutfi Peter Membrey J4yC33 My sponsors and top patrons: http://www.electroboom.com/?page_id=727 Enter your school for tools: https://goo.gl/forms/VAgRre8rLVvA1cEi2 By: Mehdi Sadaghdar 0:00 What’s inside a Hair Dryer 1:08 Making a Foam Cutter 3:50 Making a Fuse?! 4:21 Making an Engraver 6:04 Making a Smoke Extractor 7:53 Making Power Resistors 9:25 How a Potentiometer Works