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by peterlite
Tue Apr 18, 2017 7:32 am
Forum: Troubleshooting
Topic: Extending RPI3B wifi range
Replies: 4
Views: 1001

Re: Extending RPI3B wifi range

https://www.raspberrypi.org/documentati ... ess-cli.md
offical documentation but no date or mention of Jessie/Wheezy.

Jessie Lite is Raspbian without a GUI:
viewtopic.php?f=91&t=130976
by peterlite
Tue Apr 18, 2017 7:27 am
Forum: Other projects
Topic: Oregon Scientific RMR500 replacement using the Pi Zero W.
Replies: 13
Views: 5071

Re: Oregon Scientific RMR500 replacement using the Pi Zero W

Solar panel arrived today. It looks big. It will cover my whole project container and then some. Still waiting on two more parts.
by peterlite
Tue Apr 18, 2017 1:55 am
Forum: Beginners
Topic: Which Pi to use?
Replies: 17
Views: 2139

Re: Which Pi to use?

The Pi camera has only a short cable, limiting positioning, and the result would not be transferable to other projects. You are also limited to the lens on the camera. For a self drive car, you need several cameras, another reason to start with a USB camera. The Pi 3 works out to be cheaper than add...
by peterlite
Mon Apr 17, 2017 11:21 pm
Forum: Other projects
Topic: Looking for a system, is it possible?
Replies: 6
Views: 1707

Re: Looking for a system, is it possible?

Google raspberry pi i2c. I2C seems to be the most popular sensor connection. You could have a central Pi monitoring your home and a Pi Zero W for each camera to detect motion. You could google magpi camera. Magpi is the Raspberry Pi magazine and has articles on detecting numberplates using the Pi ca...
by peterlite
Mon Apr 17, 2017 11:45 am
Forum: Other projects
Topic: Looking for a system, is it possible?
Replies: 6
Views: 1707

Re: Looking for a system, is it possible?

You can do all of that with a Pi. There will be more than coding, there will be some electronics. There are posts on motion detection, feeding data to cell phones, and connecting to reed switches etc. You may have to combine advice from several sources. Most of the examples are written in Python. Do...
by peterlite
Mon Apr 17, 2017 11:36 am
Forum: Troubleshooting
Topic: Extending RPI3B wifi range
Replies: 4
Views: 1001

Re: Extending RPI3B wifi range

You can switch off the onboard Wifi and use a USB 2 Wifi adapter anywhere up to 2000mw. You can also use directional antenna to focus the power toward your router. You can start Raspbian with both Wifi working then switch one off in the Wifi controller at the top right hand corner of the screen.
by peterlite
Mon Apr 17, 2017 4:50 am
Forum: Raspbian
Topic: Orca and VMG not working
Replies: 7
Views: 1465

Orca and VMG not working

Using an up to date Raspbian, I installed Orca then VMG. Neither worked. They both installed without errors. They both start when clicked in the menu. There are no errors in the syslog. Nothing happens with either. Their icons do not appear in the icon bar. I tested VMG from Debian testing and the r...
by peterlite
Mon Apr 17, 2017 3:32 am
Forum: Assistive technology and accessibility
Topic: Virtual glasses for computer use?
Replies: 5
Views: 9843

Re: Virtual glasses for computer use?

The lower cost VR glasses are just a smartphone in a frame. You end up with the same problems. The higher cost ones have some zoom facilities based on watching you blink and things like that. Raspbian has Orca, the Gnome screen reader. Install it from Add/Remove Software or the command line. 25 MB. ...
by peterlite
Mon Apr 17, 2017 2:51 am
Forum: General discussion
Topic: Smart irrigation system
Replies: 11
Views: 5532

Re: Smart irrigation system

Why can't i connect a 5v relay directly to the pie ? You can. The relay will use more power than a Pi GPIO pin provides. You will need a relay with an amp or a separate circuit to boots the power to the replay. What is the water source? How much pressure? You need a pump if moving water from a buck...
by peterlite
Mon Apr 17, 2017 2:41 am
Forum: General discussion
Topic: Smart irrigation system
Replies: 11
Views: 5532

Re: Smart irrigation system

There are many posts about moisture sensors. Google Raspberry Pi moisture sensor. There are also many posts about controlling relays. https://www.raspberrypi.org/forums/viewtopic.php?f=91&t=180672 If you run your system from a domestic water system, you need backflow protection and a heap of other s...
by peterlite
Mon Apr 17, 2017 2:35 am
Forum: General discussion
Topic: How to plug in a PCI card into a Pi ?
Replies: 9
Views: 7865

Re: How to plug in a PCI card into a Pi ?

A PCI adapter is likely to cost more than the PCI card or the USB equivalent to the PCI card. You could recycle a dumped PC as the PCI card host and access the PC through VNC to save using a second keyboard/mouse/monitor. The recycled PC could hold several PCI cards.
by peterlite
Sat Apr 15, 2017 3:34 am
Forum: Automation, sensing and robotics
Topic: Fan and led strip control
Replies: 2
Views: 688

Re: Fan and led strip control

Google Raspberry Pi ATX power. You will find discussions where people reuse an old ATX power supply to get 12 volts for the fans plus 5 volts for the Pi. They then use PWM to control PWM fans, giving you less noise when everything is not so hot. You could also google Raspberry Pi PWM for thoughts on...
by peterlite
Fri Apr 14, 2017 11:37 pm
Forum: Off topic discussion
Topic: What is a good kit to learn about retro computing?
Replies: 21
Views: 7852

Re: What is a good kit to learn about retro computing?

1960s was PNP logic. Could put them on a breadboard with LEDs to show the status. I am sure there was a kit like that advertised last year. There are usually kits that do part of what you want but not everything. Buy a record player, an old LP, and a cassette recorder. Spray the LP with iron oxide p...
by peterlite
Fri Apr 14, 2017 11:12 pm
Forum: General discussion
Topic: microSD card max size
Replies: 16
Views: 9014

Re: microSD card max size

The first partition, the FAT partition, is limited to 32 GB. The second partition, the Ext4 partition, is only limited by the card size, currently 256 GB. For the cost of a 256GB microSD card, you can get a 480 GB SSD.
by peterlite
Fri Apr 14, 2017 11:04 pm
Forum: General discussion
Topic: Pi accessories seem to be the limit for my projects
Replies: 18
Views: 2446

Re: Pi accessories seem to be the limit for my projects

Dear Burngate, sounds like you remember the early years of electronics that my grandfather used to talk about. Working at the forge beating iron into the little square tube for USB plugs. Hand carving flash memory cells into silicon. :roll: I am no so good at electronics. I would be worse than the o...
by peterlite
Fri Apr 14, 2017 9:08 am
Forum: General discussion
Topic: Multiple DS18B20 and MicroSD lifecyfle
Replies: 8
Views: 1212

Re: Multiple DS18B20 and MicroSD lifecyfle

If you are storing in memory, you need uninterruptible power. A battery pack or equivalent. A 100,000 write limit is of the whole card. A block might have a limit of 10K or 100K then the controller spreads the wear out. If you write 1% of the card, you use only 1% of 100,000 and have 100,000 writes ...
by peterlite
Fri Apr 14, 2017 8:53 am
Forum: Raspbian
Topic: Latest version of gnome-disk-utility [solved]
Replies: 2
Views: 1762

Re: How do I get the latest version of gnome-disk-utility?

Done. I had done something similar to get the latest version of Nginx in Linux Mint but did not keep an image of the work and could not find equivalent posts for Raspbian. Now I have Stretch in as priority -10. Disks is working. /etc/apt/preferences: Package: * Pin: release n=jessie Pin-Priority: 60...
by peterlite
Fri Apr 14, 2017 3:05 am
Forum: General discussion
Topic: Pi accessories seem to be the limit for my projects
Replies: 18
Views: 2446

Re: Pi accessories seem to be the limit for my projects

Most parts here for 10 watts power. Two parts to arrive after Easter.
by peterlite
Fri Apr 14, 2017 3:02 am
Forum: Beginners
Topic: LCD monitor for RPi
Replies: 7
Views: 1074

Re: LCD monitor for RPi

Televisions often contain USB ports. The same size TV will cost more and most likely have multiple HDMI inputs, letting you connect a few computers and flick between them. TVs are more likely to be on sale at clearance prices. When on sale, the TVs are similar in price to a monitor + powered USB hub...
by peterlite
Fri Apr 14, 2017 2:47 am
Forum: Beginners
Topic: Pi3 beginner
Replies: 2
Views: 479

Re: Pi3 beginner

Google Magpi, the Raspberry Pi magazine. read the magazine with your children and grandchildren. There will be projects in there of interest to everyone. The PDF downloads are free.
by peterlite
Fri Apr 14, 2017 2:26 am
Forum: General discussion
Topic: Tech Specs for PiDrive 314GB and 1TB.... nowhere to be found
Replies: 13
Views: 2410

Re: Tech Specs for PiDrive 314GB and 1TB.... nowhere to be f

Write speed is the limiting factor for most storage devices. My 2 TB drive delivers 16 MB/s writes for small files and 32.6 MB/s writes for large files. A microSD card with that write speed is expensive, over a $1.20 per gigabyte. My 2 TB disk would cost $2437.00 at fast microSD card prices. :geek: ...
by peterlite
Fri Apr 14, 2017 2:16 am
Forum: General discussion
Topic: Tech Specs for PiDrive 314GB and 1TB.... nowhere to be found
Replies: 13
Views: 2410

Re: Tech Specs for PiDrive 314GB and 1TB.... nowhere to be f

Plus...that 2TB drive will require its own PSU. The 2 TB drive runs happily from a Pi 3B. There is no error during boot with the disk in place. When I plug the device in after boot, there is sometimes a lightening bolt for a fraction of a second but it does not interrupt the Pi. The peak usage is o...
by peterlite
Fri Apr 14, 2017 12:00 am
Forum: General discussion
Topic: Questions about A rack for a Raspberry Pi Cluster
Replies: 6
Views: 2320

Re: Questions about A rack for a Raspberry Pi Cluster

I prefer the standoffs to a box due to our hot weather. No point in a cluster of Pi when each one slows down due to heat.

Other ideas: https://www.google.com.au/search?q=rasp ... 60&bih=876
by peterlite
Thu Apr 13, 2017 11:53 pm
Forum: Troubleshooting
Topic: Keyboard and mouse
Replies: 5
Views: 607

Re: Keyboard and mouse

Unplug the keyboard. Run command lsusb. Plug in the keyboard. Run command lsusb. There should be an extra line containing a USB ID. Google the ID for problems in Linux. You might need a different driver. If nothing appears in lsusb, there may be an error message in syslog. If there is nothing in sys...

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