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by qwertyuiopzxcvbnm
Sat Aug 20, 2016 1:08 pm
Forum: General discussion
Topic: Powering a Pi Zero directly from 3AA batteries
Replies: 5
Views: 3210

Powering a Pi Zero directly from 3AA batteries

I saw some tests in another thread about powering the Pi Zero from a source down to 2.9V. I'd like to ask what the implications for the 3.3V sections of the Pi Zero are when powering at such a low voltage (for instance, will the GPIO pins output a high value of 2.9V, or will they just stop working)....
by qwertyuiopzxcvbnm
Tue May 10, 2016 7:12 pm
Forum: Python
Topic: Code editor
Replies: 11
Views: 2539

Re: Code editor

nano is a simple command-line code editor. It's accessed by typing nano myscript.py where 'myscript.py' is the name of your python file (doesn't have to exist beforehand). If on the other hand you're using the desktop GUI, then you should be able to use the standard Python IDLE, which will be in the...
by qwertyuiopzxcvbnm
Tue May 10, 2016 6:53 pm
Forum: General discussion
Topic: 5 inch HDMI Display stuff
Replies: 33
Views: 5502

Re: 5 inch HDMI Display stuff

The DCDC converter that you linked is a step- down module, and wouldn't be able to boost 4.8V (4 NiMH bateries in series, to the 5V needed by the Pi. You might be able to power the Pi at 4.8V, but it probably wouldn't be very stable, and wouldn't last long. A cheap portable mobile phone battery woul...
by qwertyuiopzxcvbnm
Tue May 10, 2016 5:45 pm
Forum: General discussion
Topic: CE and FCC for HATs/Arduino shields etc...
Replies: 0
Views: 310

CE and FCC for HATs/Arduino shields etc...

There doesn't seem to be a great deal of information on the internet about this, so I'm going to ask this here, in the hope that somebody has experience with it. Are there exceptions from CE, or FCC compliance for boards such as HATS/Arduino shields etc... which are unintentional radiators? Most boa...
by qwertyuiopzxcvbnm
Tue May 10, 2016 2:08 pm
Forum: General discussion
Topic: Pi Zero?
Replies: 2
Views: 651

Pi Zero?

Any updates on when the Pi Zero might be available? The previous threads on this seem to have been locked several weeks ago.
by qwertyuiopzxcvbnm
Sun Mar 13, 2016 6:27 pm
Forum: Python
Topic: GPIO without keyboard (Python)
Replies: 11
Views: 2134

Re: GPIO without keyboard (Python)

If the raspberry pi has wifi, or you are able to connect wifi to it through USB, you could always SSH in from another computer and run the program from there. Raspberry Pi have a great tutorial on setting up SSH here:
https://www.raspberrypi.org/documentati ... ccess/ssh/
by qwertyuiopzxcvbnm
Sun Mar 13, 2016 6:12 pm
Forum: General discussion
Topic: "Buy Codecs" in forum navigation
Replies: 6
Views: 1333

Re: "Buy Codecs" in forum navigation

Thanks, It seems to work when typing www.raspberrypi.com directly into the browser, but when clicking Buy Codecs, it comes up with a page saying Your connection is not secure The owner of www.raspberrypi.com has configured their website improperly. To protect your information from being stolen, Fire...
by qwertyuiopzxcvbnm
Sun Mar 13, 2016 6:05 pm
Forum: Python
Topic: WebIOPi Not loading HTML
Replies: 3
Views: 2203

Re: WebIOPi Not loading HTML

I managed to fix this in my case. In the python code, I deleted everything after the line

Code: Select all

#initialise server
This seemed to fix the issue for me.
by qwertyuiopzxcvbnm
Sun Mar 13, 2016 5:57 pm
Forum: General discussion
Topic: "Buy Codecs" in forum navigation
Replies: 6
Views: 1333

"Buy Codecs" in forum navigation

Does anyone have any idea what this is for? It seems to link to a page that Firefox considers to have an untrusted connection(www.raspberrypi.com).
by qwertyuiopzxcvbnm
Sun Mar 13, 2016 1:32 pm
Forum: Automation, sensing and robotics
Topic: GoPiGo and Pi2Go motor voltage (standard yellow motors)
Replies: 0
Views: 479

GoPiGo and Pi2Go motor voltage (standard yellow motors)

Does anyone know the max voltage rating for the motors(they look like the standard yellow ones) used in these kits(GoPiGo, Pi2Go, and others)? I'm asking because the only versions of the standalone motors that I can find to buy online(ones with documented maximum voltage rating anyway) seem to be ra...
by qwertyuiopzxcvbnm
Fri Nov 06, 2015 7:56 am
Forum: Bare metal, Assembly language
Topic: Bare-metal SPI Display using GPU
Replies: 8
Views: 4009

Re: Bare-metal SPI Display using GPU

I would want to use the GPU to free up power on the CPU for processing. I was under the impression that it would take up quite a bit of CPU time to run the screen off it. Am I wrong in thinking that? Would the CPU still be able to carry out processor intensive tasks without much loss of speed? And t...
by qwertyuiopzxcvbnm
Thu Nov 05, 2015 9:54 pm
Forum: Bare metal, Assembly language
Topic: Bare-metal SPI Display using GPU
Replies: 8
Views: 4009

Bare-metal SPI Display using GPU

I am interested in using an SPI Display with the Rasperry Pi in assembly(such as the PITFT from Adafruit). I think I could work out how to get it working using the CPU, but is there a way of getting the GPU to output screen data over SPI? And what would this involve?
by qwertyuiopzxcvbnm
Fri May 01, 2015 7:40 pm
Forum: Python
Topic: WebIOPi Not loading HTML
Replies: 3
Views: 2203

WebIOPi Not loading HTML

I've written a WebIOPi interface for an rc car powered by the Raspberry Pi. This is the Python code: #Initialise modules and global values import webiopi GPIO = webiopi.GPIO leftServo = 8 rightServo = 7 #Initialise pins as PWM GPIO.setFunction(leftServo, GPIO.PWM) GPIO.setFunction(rightServo, GPIO.P...

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