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  • Great product

    posted by Pquang on 08/24/2013

    Involvement:Expert (understands the inner workings) - Ownership:more than 1 month


    The module is inexpensive, but is very well built. It is super useful. I used it to build an iDevice charger by using a Nikon EN-EL3e 7.4V battery, and by adding 2 voltage dividers for the data lines. I was also able to use it to step down the voltage from car battery to power Raspberry Pi, a USB hub, and several other USB devices.


    none at all


    When I adjust the pot to exact 5.0V for powering Raspberry Pi in the car, the voltage is very stable. But when I start adding other USB devices like a WiFi dongle and USB receiver, the voltage can drop to 4.8V (still not crashing RPi yet), but I was able to adjust the pot to bring it back up to 5.0V easily


    The product is great and super useful. I decided to skip the 7805 altogether because of the heat and inefficiency. I was very happy with the decision because this module can handle more current with no heat issue, plus I can reuse the module over and over for other projects with different voltages.

    • Fast-charging iPhone
    • Modified with voltage dividers
    • Voltage dividers and USB ports

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