$2 for 5 PCBs (born for easier prototype): https://jlcpcb.com/ Previous video: https://www.youtube.com/watch?v=OwAZqJ4wpJg DIY Cooler video: https://www.youtube.com/watch?v=1Kp_yWY2tdU TechBuilder DIY Candle Powered USB Charger: https://www.youtube.com/watch?v=PAMzAGge8bM Facebook: https://www.facebook.com/greatscottlab Twitter: https://twitter.com/GreatScottLab Support me for more videos: https://www.patreon.com/GreatScott?ty=h In this video we will have a closer look at a fake thermoelectric generator and find out exactly why it can not charge up a smartphone like advertised. While doing so, you will learn quite a bit about Peltier modules. Afterwards I will then show you how to create a real thermoelectric generator that can charge up a smartphone through the power of tea lights and ice water. Let's get started! Thanks to JLCPCB for sponsoring this video Visit https://jlcpcb.com/ to get professional PCBs for low prices Music: 2011 Lookalike by Bartlebeats (incompetech.com)