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2785Re: Preparing to purchase Raspberry Pi

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  • calvin_groups
    Feb 8, 2014
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      I just set up my RPi. I run the keyboard, an optical mouse, and a WIFI adapter from an unpowered hub. No power related issues seen

      Cal
      N9KO

      --- In Raspberry_Pi_4-Ham_RADIO@yahoogroups.com, Max Harper <kg4pid@...> wrote:
      >
      > The statement "You will also need an external USB powered hub for the keyboard and mouse.  The pi USB port is limited in current." is questionable. No, you can't draw the 500ma that USB is speced for, but that usually is not the real problem. I have seven Raspi and don't use a powered hub on any of them. I have all kinds of devices connected to them. Some have un-powered hubs where I needed more ports. They are all powered with a power supply from Adafruit and I don't have the problems that I read about daily. This supply is set at 5.25V to make up for the voltage drop in the cable.
      >  
      > http://www.adafruit.com/products/501
      >  
      > The Raspi should have had an onboard regulator. It would have eliminated most of the power related problems. Trying to run one off of a cheap cell phone charger that has poor regulation is where most of the problems begin. There is a difference between a charger and a power supply.
      >  
      > Max KG4PID
      >  
      >
      > ________________________________
      > From: "mccrpt@..." <mccrpt@...>
      > To: Raspberry_Pi_4-Ham_RADIO@yahoogroups.com
      > Sent: Thursday, February 6, 2014 1:54 PM
      > Subject: [Raspberry_Pi_4-Ham_RADIO] RE: Preparing to purchase Raspberry Pi
      >
      >
      >
      >  
      > Robert,
      >
      > I purchased most of my Pi gear from MCM.  They have good pricing.
      >
      > One issue is the 5V power to the pi and MCM sells a Wal-wart with the proper small connector for the pi.  Also they sell a smaller PC type USB keyboard for $10 that does not have the extra number pad to the right so it is more compact.  Of course a regular PC USB keyboard will work.
      >
      > You will also need an external USB powered hub for the keyboard and mouse.  The pi USB port is limited in current.
      >
      > The only other issue with the pi is its video output is A/V so need somthing like a TV for the display.
      >
      > I also got from MCM the memory card with OS for pi on it, but one can download and save some money.  There are some good getting started books for the pi so lit is all over.  Amazon.com has many.
      >
      > 73, ron, n9ee/r
      >
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