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by MarkHaysHarris777
Tue Mar 31, 2015 11:10 pm
Forum: Beginners
Topic: Joined this world
Replies: 14
Views: 1576

Re: Joined this world

... and do yourself a favor and order yourself an extra SD card; I would recommend one preinstalled with NOOBS; when you have everything install Raspbian.
by MarkHaysHarris777
Tue Mar 31, 2015 11:08 pm
Forum: Python
Topic: PyQt5 wheezy
Replies: 4
Views: 9499

Re: PyQt5 wheezy

If anyone could suggested how I install this package I would be grateful.
in lxterminal

sudo apt-get update
sudo apt-get upgrade

sudo apt-get install python3-pyqt5


If you run into errors, fix, then retry.
by MarkHaysHarris777
Tue Mar 31, 2015 11:02 pm
Forum: Troubleshooting
Topic: Raspberry Pi 2 Model B very frequent corruptions
Replies: 3
Views: 547

Re: Raspberry Pi 2 Model B very frequent corruptions

You might have a bit of something down in the card adapter slot. DO NOT BLOW on it with your mouth... use an air can and blow it out. These are available places like Radio Shack, and other places... compressed air in a can. I had a card with a bit of something on it (a fleck of dust will do it) will...
by MarkHaysHarris777
Tue Mar 31, 2015 10:55 pm
Forum: Graphics, sound and multimedia
Topic: gpio display and hdmi display
Replies: 5
Views: 6827

Re: gpio display and hdmi display

I got the raspberry pi b2 and I wanted to create a portable and main game station from it; so that I can play games on the bus and with a bigger screen home. Really. Which screen are you going to use? How are you going to power it? Do you have a case for it already, or are you planning to print one...
by MarkHaysHarris777
Tue Mar 31, 2015 8:06 pm
Forum: Automation, sensing and robotics
Topic: GPIO, serial port, and radio transceiver
Replies: 4
Views: 2373

Re: GPIO, serial port, and radio transceiver

Its not the weight of the card that's the problem. Its the weight of the power supply. The RPi just uses too much power; the batts required to keep the thing in the air for very long would probably not get off the ground. On the other hand, batts that would get off the ground wouldn't last long! ;)
by MarkHaysHarris777
Tue Mar 31, 2015 7:34 pm
Forum: Automation, sensing and robotics
Topic: GPIO, serial port, and radio transceiver
Replies: 4
Views: 2373

Re: GPIO, serial port, and radio transceiver

:( ... not a good idea. 1) RPi uses too much power 2) RPi is too heavy 3) RPi uses wrong voltage(s) 4) RPi (headless) is not the right MCU... I would use an Arduino Uno on first attempt, then move up to the Mega, or Due (careful with the Due because it has the same problem with voltages 3v3. The bes...
by MarkHaysHarris777
Tue Mar 31, 2015 7:26 pm
Forum: Other projects
Topic: I don't work at a bowling alley....
Replies: 11
Views: 1862

Re: I don't work at a bowling alley....

Most people new to the RPi and GPIO spend a few hours blinking an LED. You will need to learn a language like Python, or C|C++, or Scratch... you will need to learn how to connect an LED, or other light, without blowing the RPi (it is finiky using 3v3 logic and if you do it wrong it will die). You n...
by MarkHaysHarris777
Tue Mar 31, 2015 7:22 pm
Forum: Beginners
Topic: So I am biting off more than I can chew
Replies: 2
Views: 417

Re: So I am biting off more than I can chew

No, if you've bitten off more than you can chew, take smaller bytes.


(start small, learn the ropes, do your own legwork)

:geek:
by MarkHaysHarris777
Tue Mar 31, 2015 7:19 pm
Forum: Troubleshooting
Topic: Disabling composite sleep
Replies: 2
Views: 415

Re: Disabling composite sleep

... google is our friend: search:

raspberry pi disable monitor sleep


enjoy
:D
by MarkHaysHarris777
Tue Mar 31, 2015 7:13 pm
Forum: Other projects
Topic: First time eating Pi...thin client question
Replies: 3
Views: 1124

Re: First time eating Pi...thin client question

I would not recommend setting up an RPi 2 as a thin client to Windows 7 (your mum will be frustrated with the setup). On the other hand, the RPi 2 is 'almost' capable of replacing a desktop PC for most tasks that your mum would be interested in. LibreOffice, Epiphany, gmail, work great. The idea of ...
by MarkHaysHarris777
Tue Mar 31, 2015 6:48 pm
Forum: General discussion
Topic: The first PI - Crunch data? (like seti etc)
Replies: 4
Views: 1459

Re: The first PI - Crunch data? (like seti etc)

... it also depends greatly on 'how many' PI 2 units are crunching - :P Any project that can be built from sources will run on PI 2 also, as long as you have the dependencies on-board. If you don't have the sources, and the project isn't built for the Arm, then you're out of luck. Check with the DC ...
by MarkHaysHarris777
Tue Mar 31, 2015 6:40 pm
Forum: General discussion
Topic: Raspberry Pi 2 Jet Engine Noise
Replies: 9
Views: 4316

Re: Raspberry Pi 2 Jet Engine Noise

Your fan is going to cause you two problems... one is the noise, and the second is dust. You do not want a fan pulling dust into your enclosure; otherwise, you will have a heat problem. On the other hand, your fan is very cool <pun intended>. I like it. You now have a RPi project to work on... use o...
by MarkHaysHarris777
Tue Mar 31, 2015 9:18 am
Forum: Python
Topic: Multiple connections from a single Bluetooth Dongle
Replies: 11
Views: 14666

Re: Multiple connections from a single Bluetooth Dongle

No.

Blue tooth would not be secure in that case. Normally blue tooth send/receive pairs need to be "paired" ... at any rate, its a serial connection ( full duplex ) but not multiple connections...
not at the same time.
by MarkHaysHarris777
Tue Mar 31, 2015 7:42 am
Forum: Other
Topic: how can i run android on the pi
Replies: 6
Views: 2572

Re: how can i run android on the pi

You do not want to run Android on the Raspberry PI. Android uses a specialized linux kernel to allow Google to run its Dalvik virtual machine. Android is less about gnu/linux and more about Java... or their version of it. Android is also specialized for a specific kind of hardware (phones and tablet...
by MarkHaysHarris777
Tue Mar 31, 2015 7:32 am
Forum: Automation, sensing and robotics
Topic: Design needed.
Replies: 1
Views: 465

Re: Design needed.

Pullup resistors are typically NOT designed, as it were, because they usually are not critical. They are chosen based on the characteristics of the device driving them, but usually with wide tolerance for success. A weak pullup would be in the range of 100K. A medium strong pullup would be in the ra...
by MarkHaysHarris777
Tue Mar 31, 2015 6:48 am
Forum: General discussion
Topic: boinc headless
Replies: 2
Views: 1291

Re: boinc headless

greetings, I assume you are referring to : http://boinc.berkeley.edu/ You can do anything (headless) with your raspberry PI that you can do (headless) with any other gnu/linux server. Just use raspi-config to change the bootup options so that it doesn't startx at bootup (I always configure my RPi(s)...
by MarkHaysHarris777
Wed Mar 25, 2015 7:06 am
Forum: Python
Topic: RPi GPIO: GPIO.RISING detects also falling edges?
Replies: 28
Views: 10672

Re: RPi GPIO: GPIO.RISING detects also falling edges?

This is a common problem, having to do with what is called hysteresis. You may need to condition the output from your sensors to get a true edge that may be relied upon to trigger an interrupt. A true falling (or rising) hysteresis will be straight, clean, sharp and distinct in a very small amount o...
by MarkHaysHarris777
Wed Mar 25, 2015 6:51 am
Forum: General discussion
Topic: JTRON 8 digit seven segment multiplexed display
Replies: 0
Views: 612

JTRON 8 digit seven segment multiplexed display

Greetings, I recently received a gift of a pair of JTRON PN297686 8 digit seven segment multiplexed displays. I wrote some python code (which I am uploading here) to drive the displays and to demonstrate how they function. http://www.dx.com/p/bonatech-8-digit-led-seven-segment-display-module-deep-bl...
by MarkHaysHarris777
Mon Mar 23, 2015 6:23 pm
Forum: General discussion
Topic: STICKY: Introduce yourself!
Replies: 3511
Views: 93569

Re: Introduce yourself!

Greetings from another HP museum member, Marcus. Good to hear from you! ... yes, planning to be active here, and on Intel site (edison) as well. I almost blew my Raspberry PI this morning! I got ahold of a wedge from Sparkfun that got the ribbon cable connector soldered in on the wrong side of the ...
by MarkHaysHarris777
Mon Mar 23, 2015 7:56 am
Forum: General discussion
Topic: STICKY: Introduce yourself!
Replies: 3511
Views: 93569

Re: Introduce yourself!

Greetings, marcus here... I'm a computer geek (programming & EE), musician, sailor, software engineer, and theologian. Most recently I am working with micro-controllers (Raspberry PI, Arduino, Intel Edison). My interest currently is embedded systems automation, robotics, and computational strategies...

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