Recommended · for beginners
Voltage regulator tutorial & USB gadget charger circuit
Why people recommend it
A beginner tutorial on linear regulators such as the 7805, ending with a USB charger circuit; suggested to people powering an Arduino or Raspberry Pi.
In their words
If you don't want to read the datasheets (but you really really and again really should), you can watch this short video which explains how linear regulators work.
AndrejaKo on electronics.stackexchange.com, Sept 2011. CC BY-SA.
For more information on how to use the 7805, refer to this Youtube video.
slippery on raspberrypi.stackexchange.com, Sept 2013. CC BY-SA.
