Go to advanced search

by hippy
Sun Dec 10, 2017 1:18 am
Forum: The MagPi
Topic: Issue 64 of Magpi
Replies: 2
Views: 102

Re: Issue 64 of Magpi

As I have a copy of issue 64 on my PC (2017-11-28) that indicates the normal download link was working. What error are you seeing ?
by hippy
Thu Dec 07, 2017 6:38 pm
Forum: Troubleshooting
Topic: Official Raspberry Pi power supply unusable for acquiring audio
Replies: 14
Views: 418

Re: Official Raspberry Pi power supply unusable for acquiring audio

On the other hand, if I power the Pi with lithium batteries ... the noise goes away. That doesn't necessarily conclusively prove the issue lies with the official power supply. I don't intend to test you, just trying to learn. What else can it be? It might an issue with your home-built HAT. Maybe it...
by hippy
Thu Dec 07, 2017 12:10 pm
Forum: Troubleshooting
Topic: Official Raspberry Pi power supply unusable for acquiring audio
Replies: 14
Views: 418

Re: Official Raspberry Pi power supply unusable for acquiring audio

rmarques wrote:
Thu Dec 07, 2017 12:18 am
On the other hand, if I power the Pi with lithium batteries ... the noise goes away.
That doesn't necessarily conclusively prove the issue lies with the official power supply.
by hippy
Wed Dec 06, 2017 5:55 pm
Forum: General discussion
Topic: First "REAL" RPi Rack
Replies: 27
Views: 6208

Re: First "REAL" RPi Rack

Just for amusement I calculated a standard 40 foot shipping container could become a rack for 2 million Pi CM3 or Zeroes.

$60 million or $10 million respectively plus cost of backplanes, a large power socket, an extractor fan, and the container.
by hippy
Wed Dec 06, 2017 5:41 pm
Forum: General discussion
Topic: First "REAL" RPi Rack
Replies: 27
Views: 6208

Re: First "REAL" RPi Rack

if you are going to all the trouble of making a custom rack for high density clusters, then why not build a rack based on the CM3. I wondered that. The recent RPF Blog entry about the huge BitScope cluster gave some insights into that. From Bruce Tulloch, CEO and Managing Director - "Some people ar...
by hippy
Wed Dec 06, 2017 5:21 pm
Forum: General discussion
Topic: Is it Raspberry Pi a good board to learn embedded systems and all topics that a ES employer might care about?
Replies: 6
Views: 240

Re: Is it Raspberry Pi a good board to learn embedded systems and all topics that a ES employer might care about?

Well, I had an interview with a company who creates embedded systems for the automobile industry and they asked me for which embedded systems I had worked. When I said Raspberry Pi, they responded me that that's not necessary an embedded system... I kinda agree with them.. Like using a PC a Pi isn'...
by hippy
Wed Dec 06, 2017 3:12 pm
Forum: General discussion
Topic: OK. This is ridiculous!
Replies: 34
Views: 1533

Re: OK. This is ridiculous!

Fast Desktop PC $800 with a quad core i7, 16GB RAM, SSD. Raspberry Pi $35 with quad core ARMv8, 1GB RAM, 8GB SD card extra (You could buy 20 Pi for the price of the desktop...) I bought a quad-core 2.4GHz Intel system, 4GB RAM, 1TB HDD, HDMI graphics, GB Ethernet, Wi-Fi, Bluetooth, 6 x USB, 2 x USB...
by hippy
Tue Dec 05, 2017 4:56 pm
Forum: Troubleshooting
Topic: Prevent SD-Card Corruption
Replies: 215
Views: 168104

Re: Prevent SD-Card Corruption

johnspackman wrote:
Tue Dec 05, 2017 12:59 pm
All the suggestions above are attempting to fix a minor problem, and all cost a hat load of money.
^^^ exactly.
Indeed. Same line of argument as to why there's no need for more gun control in America. 325 million people, only a few murdered by guns each year: 0.003%
by hippy
Tue Dec 05, 2017 12:36 pm
Forum: Beginners
Topic: Safety Instructions
Replies: 18
Views: 584

Re: Safety Instructions

We're often told not to stand under a tree in a thunder storm, but I've known lots of people do so, and none of them has died. On the other hand, all the people who didn't got very wet. I know one of those people who decided to keep dry and took a lightning strike. They didn't die - got off remarka...
by hippy
Tue Dec 05, 2017 11:43 am
Forum: Python
Topic: Daily Heartbeat Email
Replies: 11
Views: 282

Re: Daily Heartbeat Email

Similar to PingoBags; have a counter reset to zero whenever an email is sent. Increment that counter at a timed rate in a separate thread and, once it exceeds 24 hours' worth of increments, send a 'still alive' email.
by hippy
Tue Dec 05, 2017 11:34 am
Forum: Raspberry Pi Desktop for PC and Mac
Topic: STICKY: X86 Debian Stretch with RPi Desktop
Replies: 14
Views: 623

Re: STICKY: X86 Debian Stretch with RPi Desktop

- use the same keyboard layout as this server That seems an unnecessary restriction. I would have expected there to be some means of configuring each Pi individually even though they use 'the same server image'. I am wondering if each Pi also needs to have the same screen geometry and so on. I have...
by hippy
Tue Dec 05, 2017 10:25 am
Forum: Raspberry Pi Desktop for PC and Mac
Topic: STICKY: X86 Debian Stretch with RPi Desktop
Replies: 14
Views: 623

Re: STICKY: X86 Debian Stretch with RPi Desktop

mikerr wrote:
Tue Dec 05, 2017 10:19 am
Pi Server ... That's interesting, but very little info
"PiServer is quite a clever piece of software, and it’ll be covered in more detail in another blog post in December" - https://www.raspberrypi.org/blog/stretc ... an-update/
by hippy
Tue Dec 05, 2017 9:27 am
Forum: Beginners
Topic: Safety Instructions
Replies: 18
Views: 584

Re: Safety Instructions

Can I plug in components on to my breadboard when the Raspiberry Pi is on? It is not recommended to do so, particularly with active components, IC's and modules. And what if I connect something wrong on the board? :shock: You may permanently damage or destroy your Pi, your breadboard circuit, or an...
by hippy
Mon Dec 04, 2017 11:02 am
Forum: General discussion
Topic: Unique ID for Pi to validate in Android app
Replies: 19
Views: 564

Re: Unique ID for Pi to validate in Android app

arjunm009 wrote:
Mon Dec 04, 2017 10:54 am
it would be interesting to know how the app knows its device.
For SSDP the app would send out a multicast 'M-SEARCH' request asking all devices, or all devices of a certain type, to respond, wait for the responses, then filter those to only display what it wants to display.
by hippy
Mon Dec 04, 2017 10:53 am
Forum: General discussion
Topic: DIY smart mirror question
Replies: 1
Views: 81

Re: DIY smart mirror question

The easiest way would be to repair or replace the power supply, hope that when it got fried it did not damage anything else.

Otherwise it's just like all the other 'can I connect this LCD to my Pi?' threads. Possibly, but perhaps not easily or cheaply.
by hippy
Mon Dec 04, 2017 10:35 am
Forum: General discussion
Topic: Unique ID for Pi to validate in Android app
Replies: 19
Views: 564

Re: Unique ID for Pi to validate in Android app

Only their apps can see sonos specific upnp or Google home specific cast devices. If there is another diy upnp/cast device, it wont show. Those apps are probably using some form of SSDP. But that doesn't stop equipment faking being something it is not. I have had my Pi identifying itself as a Tivo,...
by hippy
Mon Dec 04, 2017 9:29 am
Forum: General discussion
Topic: Pi Zero W availability
Replies: 110
Views: 5603

Re: Pi Zero W availability

I do have one question: Are the Pi Zero W which Pi Supply are selling in multiples with headers fitted bought at educational prices or at bulk prices ? I doubt anyone will give an answer to that but that seems to be the biggest obstacle to trying to run one's own resell venture. Either way it doesn'...
by hippy
Sun Dec 03, 2017 7:07 pm
Forum: General discussion
Topic: Unique ID for Pi to validate in Android app
Replies: 19
Views: 564

Re: Unique ID for Pi to validate in Android app

Is there a way to give a unique encrypted ID to a Pi for home automation purpose Should be possible as each Pi has a random serial number assigned and each would presumably be given its own unique IP address on the network it is on. SD Cards should also have their own unique ID numbers. Add a DS18B...
by hippy
Sun Dec 03, 2017 6:17 pm
Forum: General discussion
Topic: Pi Zero W availability
Replies: 110
Views: 5603

Re: Pi Zero W availability

hippy, I meant that I don't believe they ever said the Zero would be so cheap and readily available that people can treat them with reckless abandon Ah yes. So the irony is then that they so rare that if you happen to have one it's too valuable to break and you take good care of. Even though the pr...
by hippy
Sat Dec 02, 2017 10:21 pm
Forum: Automation, sensing and robotics
Topic: Rotating a needle
Replies: 7
Views: 467

Re: Rotating a needle

If the unit's needle / knob winds itself back to 'off' after being wound to a particular time when on, there will have to be some sort of clutch mechanism to allow it to freely return to its 'off' position. A stepper motor which prevents that would not be suitable by itself.
by hippy
Sat Dec 02, 2017 12:34 pm
Forum: General discussion
Topic: Pi Zero W availability
Replies: 110
Views: 5603

Re: Pi Zero W availability

hippy, No, the notion that Pi's are so cheap one can risk breakage did not take into account that they are only available at low price in limited quantities. Incorrect. The notion of the Pi as a computer cheap enough not to have to worry about kids breaking them was expressed by Eben Upton himself ...
by hippy
Sat Dec 02, 2017 11:56 am
Forum: General discussion
Topic: Pi Zero W availability
Replies: 110
Views: 5603

Re: Pi Zero W availability

It hasn't changed for the original Pi Zero which has been on sale for 2 years now It changed. Now it is one per person. The official statement is that you are not allowed to get second Zero (the one for $5). One should be enough for you. I recall it was initially one per person. Then some suppliers...
by hippy
Sat Dec 02, 2017 11:39 am
Forum: General discussion
Topic: Pi Zero W availability
Replies: 110
Views: 5603

Re: Pi Zero W availability

Now since one of the main points about Pis in general is that they are so cheap that one cn risk breakage without being concerned about replacement cost, an enforced policy of one per person is simply insane. No, the notion that Pi's are so cheap one can risk breakage did not take into account that...
by hippy
Fri Dec 01, 2017 6:51 pm
Forum: Advanced users
Topic: Scaling digital signage to 500 screens with limited bandwidth
Replies: 8
Views: 340

Re: Scaling digital signage to 500 screens with limited bandwidth

The usual way would be to push a single stream out and then have every screen pick up that stream and output it. You can increase the number of streams up to the bandwidth available.

Do you really have or need 500 screens each showing different content ?

Go to advanced search