[clug] Using an RPi3 to drive a scanner

jhock at iinet.net.au jhock at iinet.net.au
Mon Jun 3 23:00:45 UTC 2019


I went to - I think it's called - the Hack Void Club when I was developing an automatic hatch opener on my chicken coup. Someone there was using Raspberry Pi and actuators to run a plotter. They may be able to help you.

John. 

On 3 June 2019 23:31:35 GMT+10:00, George at Clug via linux <linux at lists.samba.org> wrote:
>Simon,
>
>
>I was once wanting to run a USB DVD drive from a Table PC, I was going
>to purchase a powered USB hub, so the hub powered the USB drive and
>not the Table PC, however I used a USB memory drive instead of the DVD
>drive, so I never tested the idea in the real world.
>
>
>George.
>
>
>
>On Monday, 03-06-2019 at 22:50 Simon Oxwell via linux wrote:
>
>
>So,
>
>I've got this scanner. It's USB powered, and the docs say it's max
>power
>draw is 5W (which I'm assuming is 1A @ 5V)
>
>I'm looking to drive that with something tiny runnig SANE that I can
>bolt
>under the desk (I was a full-on Linux server, but it died and
>requirements
>have changed) so was looking at a Raspberry Pi 3. I've seen in a
>couple of
>places  that the USB line can provide 1.2A which is shared across
>the 4 USB
>ports. [1]
>
>Also based of [1] looks like I'd also need a 2.5A power supply to make
>the
>whole thing work.
>
>So, have a I got my sums right and more importantly, has anyone here
>tried
>it in practice?
>
>Simon
>
>
>
>[1] https://github.com/superjamie/lazyweb/wiki/Raspberry-Pi-Power



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