Instructables

Solar Rechargeable USB Mint Tin Power Pack

I have seen many variations on this site of power/battery packs in mint tins to charge various personal electronic projects, or solar/wind powered set ups to achieve the same purpose.

However, I haven't seen anything on making a solar or wind (preferably solar right now) rechargeable pack. My project I want to build is a mint tin containing rechargeable 9v or AA batteries with USB power connection. The tin would be able to power the personal electronic device from the batteries or the solar; and when not being used to power the device, the solar panels would recharge the batteries within so that it can be used even when the external power source isn't capable of producing power.

I would greatly appreciate it if anybody could tell me how to achieve this, or of course preferably make an instructable that I could then follow.

FYI, I am brand spanking new to all of this. This site is singularly responsible for my foray into electronics. I have experience in many other hands on craft type fields. I have been studying the projects on this site, all information that I think could help me in my new found hobby and even been salvaging and in limited amounts buying things like breadboards, and misc. electronic component kits so that when I figure out how to build the projects I have in mind (the above mentioned project first) I will have the necessary parts to do so. Although I am still trying to figure out what all the parts I have are. lol

Please feel free to message me privately with any information you deem helpful or whatever. You can also message me through my private e-mail. And if any of you are in the Colorado Springs or Denver area I would love to get together and learn whatever you are willing to teach.

Thank you, everyone, for taking the time to read this, and hopefully assist me.
James Willard  Colorado Springs, CO

Put your batteries between the solar panel and the 7805 and your set. Then the solar panel directly charges the batteries and then the batteries send power to the voltage regulator connected to the USB connector. Depending on the batteries used you may need a charge circuit to make sure you don't overcharge the batteries. But other than that its as simple as adding batteries to any of the existing solar powered charger setups. Just don't use a 9V battery. You better off using multiple AA batteries. 9v batteries don't last vary long in these charging circuits. They just don't hold a lot of power and will drain quite fast.
jwgottabass (author)  mpilchfamily1 year ago
Thanks. And its probably a stupid question, but what is a 7805? It sounds familiar.
A voltage regulator that will take anything from 7.5V to 35V and drop it to 5V.
jwgottabass (author)  mpilchfamily1 year ago
Thanks, you've been a big help.
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