Uploaded January 2015 | Updated September 2026, 2 weeks ago

---

In this video I'm comparing in practice a buck converter with LM7805 linear voltage regulator. Two driver boards from old hard drives are used as a dummy load to check efficiency and temperature of the buck converter and linear voltage regulator. I'm presenting pros and cons of both devices.
There are 2 mistakes in my calculations:
1. 5:02 - 5:08 - correct calculations should be: (12V - 5V) x 0.42A = 2.94W
2. 5:17 - 5:23 - correct calculations should be: (12V - 5V) x 0.22A = 1.54W
I double checked everything, but I should have triple checked. I'm sorry for my mistake.

Subscribe to get notified about my new videos:
youtube.com/subscription_center?add_user=electronfuncom

----------------------------------------------------------------------------------------------
YouTube channel: youtube.com/user/electronfuncom
Google+: plus.google.com/+Electronfuncom
Facebook: facebook.com/ElectronFunPage
Twitter: twitter.com/ElectronFun
Website: ElectronFun.com
----------------------------------------------------------------------------------------------

Video, edit, voice by Chris Lorkowski

Music composed and performed by Bensound - The Lounge
bensound.com