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  • Rechargeable (homemade) Power Bank (super Easy)

    You WILL need a board to handle the power input. In fact, I'm pulling one out of a defunct power bank, removing the need for such things.However, DO NOT TRY THIS. I cannot stress this enough: it can be dangerous, even with the RCA port. If the batteries are not protected, or if the voltage is not properly regulated, bad things happen.

    Here. Hopefully, this ought to clarify things at least a little.DC in can also be a solar panel.

    The capacity of an individual li-on of this type and size is more or less 2200mAh. In a series of three, the total comes out to around 6600mAh.

    More or less 6600mAh.

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  • tanef commented on BrownDogGadgets's instructable DIY Solar USB Charger - Altoids5 months ago
    DIY Solar USB Charger - Altoids

    There is, of course, an easier and cheaper way to acquire the materials needed to make this project, including the case itself, depending on whether or not you can locate the item in the attached picture.The attached image is an aluminum post light. I purchased a few of them, and payed 10$ for each. However, I found more appealing and higher-quality lights, so I decided to do something with them. You will need two of these for this.The top of the post is an aluminum screw-top containing a number of small electronics: a small circuit board controlling the LED light based on whether or not energy is coming from the solar panel, a 3V white bright LED, a 1.5V solar panel, and a 1.2V Ni-CD rechargeable battery. Though it is optional, you may use the LED as an attached flashlight.Dissassemble...see more »There is, of course, an easier and cheaper way to acquire the materials needed to make this project, including the case itself, depending on whether or not you can locate the item in the attached picture.The attached image is an aluminum post light. I purchased a few of them, and payed 10$ for each. However, I found more appealing and higher-quality lights, so I decided to do something with them. You will need two of these for this.The top of the post is an aluminum screw-top containing a number of small electronics: a small circuit board controlling the LED light based on whether or not energy is coming from the solar panel, a 3V white bright LED, a 1.5V solar panel, and a 1.2V Ni-CD rechargeable battery. Though it is optional, you may use the LED as an attached flashlight.Dissassemble the light, then use a flat-head screwdriver to remove the various parts inside, making sure to leave the plastic, solar panels and battery contacts in both parts remain intact and in place; it will make your work easier, though it is purely optional.Remove enough plastic to allow an opening for the USB output, then bend the aluminum shell inward to make an opening. Insert the USB output, solder the proper wires and connections, then hot-glue the two halves together.Congratulations! You saved 10$, plus postage and the time spent waiting for the parts to arrive.

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