The Amazing Secret in every Battery! (Fuel Gauge) EB#66

Thanks to Mouser Electronics & Texas Instruments for sponsoring this video! Check out the Mouser Memory Game: http://mou.sr/479Kpqs Check the Texas Instrument Fuel Gauge: http://mou.sr/42VLBeE Sign up for Altium Develop and see the difference: http://altium.com/yt/greatscott! (AD, Paid Promotion) BoomBox Video: https://youtu.be/vOPBkfTKzkc LED Charge Level Indicator Video: https://youtu.be/rZq2v7two1s Facebook: https://www.facebook.com/greatscottlab Twitter: https://twitter.com/GreatScottLab Instagram: https://www.instagram.com/great.scott.lab/ TikTok: https://www.tiktok.com/@greatscottlab Discord: https://discord.gg/zuAvkAuhsY Support me for more videos: https://www.patreon.com/GreatScott?ty=h In this video we will be having a look at my old Battery Level Indicator. Now it is super important to know the state of charge (SoC) of a battery. It basically tells us how much charge is left. I tried building an LED indicator for that in the past. But as time went on, this solution failed me and thus it is now finally time to learn about Fuel Gauges. These are the modern solution to keeping track of the SoC that everyone out there has already used before. Let's get started! Websites that were shown in the video: https://www.mouser.de/ProductDetail/Texas-Instruments/BQ34Z100PWR-G1?qs=igE0IiKpbrGE%2FNmDcdE48w%3D%3D https://www.ti.com/product-category/battery-management-ics/battery-fuel-gauges/overview.html https://www.mouser.de/ProductDetail/Texas-Instruments/BQ41Z50RSNR?qs=2FehpBK1j95h5MRSV2e3rA%3D%3D https://www.mouser.de/ProductDetail/Texas-Instruments/BQ27441DRZR-G1B?qs=vvk%2Fphg2gmNVugTODHzqlg%3D%3D https://www.mouser.de/ProductDetail/Soldered/333065?qs=QpmGXVUTftEyMUtYzbP%2FbA%3D%3D https://github.com/SolderedElectronics/Soldered-BQ27441-Battery-Fuel-Gauge-Arduino-Library https://github.com/sparkfun/SparkFun_BQ27441_Arduino_Library?utm_source=chatgpt.com 0:00 Old Battery Level Indicator Problem 0:57 Intro 1:28 How the old Solution works 2:41 Don't trust the Voltage! 4:01 Fuel Gauge Basics 5:19 DIY Fuel Gauge? 5:52 Finding a fitting IC 7:00 BQ27441 Fuel Gauge! 7:37 Testing! 10:19 Verdict