What's a variac? In this video we examine the cheapest variable AC transformer from Amazon (https://amzn.to/2Jin764). 5 boards for about $22 in about 7 days https://www.pcbway.com/ Yes!! I now have merch: https://teespring.com/stores/learnelectronics-store?page=1 Electronics themed T-Shirts! HEY YOU ABOUT TO POST SOMETHING STUPID: Yes, I know my hands are large/fat. It's because of a heart condition I suffer from called Congestive Heart Failure. Here's a link to some information about CHF: https://cle.clinic/2TdS2Ux One of the symptoms is that is causes fluid retention, mostly in the hands, feet/ankles, and face. It will kill me one day. I'm doing ok right now, but someday... -------------------------------------------------------------------------------------------------------------------- If you are shopping for electronic components, test gear or consumables please consider visiting my Amazon shop @ amazon.com/shop/learnelectronics Please check out www.patreon.com/learnelectronics and pledge a dollar if you can. It will go a long way to keeping the channel alive. It costs a bit of money to buy all the items and produce these videos. You help is appreciated. --------------------------------------------------------------------------------------------------------------------- Or....if you'd like to send a one-time donation you can use this link: paypal.me/learnelectronics ---------------------------------------------------------------------------------------------------------------------- Here is all the gear I currently use: Oscilloscope 1: Rigol 1054Z https://amzn.to/2PRybtN Oscilloscope 2: Siglent SDS1202X-E https://amzn.to/31Kk1yH Power Supply 1: TekPower TP3005N https://amzn.to/2TeQnxI Power Supply 2: RUIDENG DP50V5A https://amzn.to/2sNicSe Signal Generator: JS2800 https://ban.ggood.vip/d9vk DMM1: Owon18B https://amzn.to/2SbIGLs DMM2: Aneng 8008 https://amzn.to/2sNQncI DMM3: Aneng 8009 https://amzn.to/2S5qeEp DMM4: Uni-T UT801 https://amzn.to/2S89SuL Soldering Station1: Zeny (Yihua)862D+ https://amzn.to/2S49z4e Soldering Station2: KSGR T12 https://amzn.to/2Wk7Dn9 Light Meter Smart Sensor AS803 https://amzn.to/2B2gyRg