I am making a 9 volt battery powered USB charger for my friends phone. I need some help as I am using a buck converter. Answered
I am not sure how I would attach this and what each of the pins on the buck converter does. I could have made one out of a 5 volt regulator, or this: http://tinyurl.com/switch-regulator, but I don't have $15 (I have no source of income) to spend on my friends gift and I want it to be highly efficient. I am waiting for the buck converter to show up in the mail right now. The datasheet for the buck converter is: http://tinyurl.com/buck-converter. Also, I found a website that sells the kits for these: http://tinyurl.com/9v-charger for 16 dollars, but once again I don't have any money. I want to make a charger like the one they have on there out of free samples.
Thanks for the help,
P.S. My friend has an android.