Raspberry Pi: Difference between revisions
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A growing body of information is available at http://www.raspberrypi.org |
A growing body of information is available at http://www.raspberrypi.org |
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Only a |
Only a few '''critical''' issues, that are easily overlooked, are summarised below |
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== Models == |
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Most will purchase the model B, which has Ethernet and more USB ports |
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The second release of model B has 512 MB RAM in lieu 256 MB |
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*likely to increase the variety of OS that are usable |
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*earlier boards are not upgradeable, because all components are soldered in place |
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== Case == |
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The basic product is sold without a case. It does not fit in any "standard" blank case and has sockets on both sides as well as all four edges, making construction of a suitable case not a simple task. |
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Cases are now being sold on the Raspberry Pi site. Alternatively, third-party cases are also marketed |
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== Circuit Board == |
== Circuit Board == |
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Power is supplied via the micro-USB connector at one end. The surface-mounted capacitor behind that connector is a known physical weak-point. |
Power is supplied via the micro-USB connector at one end. The surface-mounted capacitor behind that connector is a known physical weak-point. |
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#*1 A available to a single socket |
#*1 A available to a single socket |
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[[User:Rpeters|Rpeters]] |
[[User:Rpeters|Rpeters]]14:15, 10 January 2013 (EST) |
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[[Category:Technical Info]] |
[[Category:Technical Info]] |
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Revision as of 03:15, 10 January 2013
A growing body of information is available at http://www.raspberrypi.org
Only a few critical issues, that are easily overlooked, are summarised below
Models
Most will purchase the model B, which has Ethernet and more USB ports
The second release of model B has 512 MB RAM in lieu 256 MB
- likely to increase the variety of OS that are usable
- earlier boards are not upgradeable, because all components are soldered in place
Case
The basic product is sold without a case. It does not fit in any "standard" blank case and has sockets on both sides as well as all four edges, making construction of a suitable case not a simple task.
Cases are now being sold on the Raspberry Pi site. Alternatively, third-party cases are also marketed
Circuit Board
Power is supplied via the micro-USB connector at one end. The surface-mounted capacitor behind that connector is a known physical weak-point.
- do not grip the board by that capacitor
- preferably leave the micro-USB power cable permanently plugged in and power ON?OFF by either
- powering the plug-pack/USB-hub ON?OFF or
- disconnecting the other end of the power cable
Power Supply
- A raspberry pi draws 0.7A (700 mA) of regulated 5V power, which is beyond the capacity of most:
- USB sockets on a computer
- mains-USB plug packs
- Suitable power supplies include
- mains-USB plug packs rated at 1A
- preferably having a single USB socket only
- USB-hubs capable to delivering 1 A to a single USB socket
- "Zipp" brand from Big W does - but check before purchasing
- mains-USB plug packs rated at 1A
- although the use of a USB-hub as a power source is deprecated by the manufacturers, it has been used sucessfully by the developers at http://www.ipfire.org. Critical factors are:
- regulated power to the hub
- 1 A available to a single socket
Rpeters14:15, 10 January 2013 (EST)
