Home Forums Hardware discussions Does power over usb work?

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  • #477
    pizzaman
    Participant

    Hi,

    the documentation & and faq claim that the espressobin can be powered over the 5V microUSB. I connected the micro usb connector to a 2A usb wall charger, yet the board does not boot. Did anyone get to boot the espresssobin over the 5V microUSB? Am I missing something?

    thanks.

    #481
    0000
    Participant

    I haven’t used my espressobin yet – no time so far – so this is pure theoretical.

    http://espressobin.net/wp-content/uploads/2017/02/ESPRESSObin_V4_Schematics.pdf

    There is a schematic which shows both the 12V jack and the usb power line “+USB5V”.

    Through the chip UP7534DMA5-15 the microusb powers ONLY the +5V line.
    +12V from the jack goes to J4 (BIT5 – MOLEX) and to the chip RT6220 – a buck converter – to feed the +5V line.

    So it should work – if your 5V 2A powersupply is of good quality. With RaspberryPi there are a lot of issues with powersupplies rated for 5V/2A but can barely manage 1A

    #488
    mdframe
    Participant

    No it does not. You must use the 12v power supply. I recently proved this to myself. You will be unable to get into the basic console mode without the power supply and the instructions are incorrect for initial start, you will not get to boot into any type of operating system.

    #50234
    IvoryHoward
    Participant

    Thanks!

    #50235
    IvoryHoward
    Participant

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