====== Youtube links ======
  * [[https://www.youtube.com/watch?v=ivVSq0IiZGo|#83 LCR's meter D, Q, Phi, ESR what is it all about demonstrated on DER EE DE-5000]]
  * [[https://www.youtube.com/watch?v=s0RkxF_yAps|#155 PART 2: Is the ESR of an electrolytic capacitor able to tell the health of it?]]
  * [[https://www.youtube.com/watch?v=cVhSCEPINpM|DIY PCB Toner Transfer (No Heat) & Etching]]
  *