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by helpme
Sun Sep 08, 2019 1:49 pm
Forum: General discussion
Topic: Good reasons to buy the latest Rpi 4 with 4G RAM?
Replies: 39
Views: 2699

Good reasons to buy the latest Rpi 4 with 4G RAM?

Thinking of whether to buy the latest Rpi 4 with 4G RAM. What are some good reasons to buy the latest Rpi 4? What are some applications that can only be handled by the latest Rpi4 and cannot be handled by older versions?
by helpme
Sun Aug 27, 2017 7:02 am
Forum: Raspberry Pi Desktop for PC and Mac
Topic: What is the purpose of Desktop Debian x86 image?
Replies: 13
Views: 5830

What is the purpose of Desktop Debian x86 image?

I just saw this new Rasbian x86 image that can be installed onto PC. I don't quite catch the purpose of this image given that it cannot talk to outside world through hardware interfaces. I am trying to understand its applications. Can anyone advise?
by helpme
Fri Aug 25, 2017 6:22 am
Forum: Raspbian
Topic: Is python 3 the default python version in Raspbian Stretch?
Replies: 3
Views: 11995

Re: Is python 3 the default python version in Raspbian Stretch?

klricks wrote:
Fri Aug 25, 2017 6:12 am
helpme wrote:
Fri Aug 25, 2017 5:59 am
I have been longing for this to happen. is python 3 now the default version in Stretch?
What do you mean by default?
Python 2.7.13 and and 3.5.3 are both installed.
Default means when I type "python" at command line, v3 is used and not v2.
by helpme
Fri Aug 25, 2017 5:59 am
Forum: Raspbian
Topic: Is python 3 the default python version in Raspbian Stretch?
Replies: 3
Views: 11995

Is python 3 the default python version in Raspbian Stretch?

I have been longing for this to happen. is python 3 now the default version in Stretch?
by helpme
Fri Aug 25, 2017 5:46 am
Forum: Raspbian
Topic: What are some reasons to upgrade from jessie to stretch?
Replies: 9
Views: 3435

What are some reasons to upgrade from jessie to stretch?

What are some new features in stretch that makes it compelling to upgrade from jessie to stretch?
by helpme
Wed Aug 23, 2017 11:54 pm
Forum: Bare metal, Assembly language
Topic: What are situations to use bare metal when python is so much easier?
Replies: 74
Views: 14549

Re: What are situations to use bare metal when python is so much easier?

That has to be the weirdest comparison ever, it's actually hard to find common ground to even compare anything :-) Anywhere you can run python you certainly won't be baremetal programming. You can run python on Raspberry Pi, yet this is a forum for discussing baremetal programming on Raspberry Pi. ...
by helpme
Wed Aug 23, 2017 12:51 pm
Forum: Bare metal, Assembly language
Topic: What are situations to use bare metal when python is so much easier?
Replies: 74
Views: 14549

Re: What are situations to use bare metal when python is so much easier?

That has to be the weirdest comparison ever, it's actually hard to find common ground to even compare anything :-) Anywhere you can run python you certainly won't be baremetal programming. You can run python on Raspberry Pi, yet this is a forum for discussing baremetal programming on Raspberry Pi.
by helpme
Wed Aug 23, 2017 6:13 am
Forum: Bare metal, Assembly language
Topic: What are situations to use bare metal when python is so much easier?
Replies: 74
Views: 14549

Re: What are situations to use bare metal when python is so much easier?

Wouldn't it make more sense to use a cheaper 32-bit MCU like STM32 for real-time guarantees? Possibly, but how many 32-bit MCU's have 1080p HDMI output and 512MB of RAM for under £10 including tax and postage? (Pi Zero) Driving the video output via framebuffer in bare metal is pretty simple. Ahh......
by helpme
Wed Aug 23, 2017 6:03 am
Forum: Bare metal, Assembly language
Topic: What are situations to use bare metal when python is so much easier?
Replies: 74
Views: 14549

Re: What are situations to use bare metal when python is so much easier?

People who write bare-metal often want to meet precise timing requirements. Raspbian is a pre-emptive multitasking desktop system and CPython employs automatic garbage-collection so you don't get any realtime guarantees with both. ghans Wouldn't it make more sense to use a cheaper 32-bit MCU like S...
by helpme
Wed Aug 23, 2017 5:55 am
Forum: Bare metal, Assembly language
Topic: What are situations to use bare metal when python is so much easier?
Replies: 74
Views: 14549

Re: What are situations to use bare metal when python is so much easier?

Reasons: Speed. Python is an script language and relatively slow (but better than some). Raw code works at full speed. Boot time. No OS to load means boot times are a few seconds. Minimal code means less to cause issues - it is only your code that is running, so you know what it is (should be) doin...
by helpme
Wed Aug 23, 2017 12:30 am
Forum: Off topic discussion
Topic: What are some useful home applications with Raspberry Pi to interest kids?
Replies: 4
Views: 1789

What are some useful home applications with Raspberry Pi to interest kids?

What are some problems you encounter at home which can be solved with the Raspberry Pi? I am searching for problems so that I can create solutions to interest my kids in engineering :)
by helpme
Wed Aug 23, 2017 12:28 am
Forum: Bare metal, Assembly language
Topic: What are situations to use bare metal when python is so much easier?
Replies: 74
Views: 14549

What are situations to use bare metal when python is so much easier?

Python code is readable and there are lots of ready libraries to use without reinventing the wheel. What are applications or situations to use bare metal code when python is so much easier?
by helpme
Sat Aug 19, 2017 12:23 am
Forum: Off topic discussion
Topic: What are some interesting RPi projects on Youtube?
Replies: 0
Views: 740

What are some interesting RPi projects on Youtube?

I would like to start a thread that collects interesting RPi projects on Youtube. Please share when you encounter any interesting projects. Even better if the interesting project is a money-making one :)

Thank you.
by helpme
Fri Aug 18, 2017 10:47 am
Forum: General discussion
Topic: What are some RPi development kits to interest kids in robotics and engineering?
Replies: 1
Views: 329

What are some RPi development kits to interest kids in robotics and engineering?

I want to interest my kids to robotics and engineering. What are some development kits to buy for this purpose?

I just found this.
https://www.dexterindustries.com/gopigo3/

Can forummers recommend any others? Price is not an important issue for the moment.
by helpme
Wed Aug 16, 2017 10:58 am
Forum: Python
Topic: How to combine these 3 lists into a single list of dictionary?
Replies: 7
Views: 953

Re: How to combine these 3 lists into a single list of dictionary?

elParaguayo wrote:
Wed Aug 16, 2017 10:56 am
EDIT: Gah - by the time I'd managed to type a nice dictionary comprehension you'd found the answer!
Your solution is most welcome. Your solution may be better than mine. Thanks for the help!
by helpme
Wed Aug 16, 2017 10:57 am
Forum: Python
Topic: How to combine these 3 lists into a single list of dictionary?
Replies: 7
Views: 953

Re: How to combine these 3 lists into a single list of dictionary?

EDIT: We've both done the same thing except you've used a dictionary comprehension which is a bit shorter but often harder to understand. How does this work for you? feature1_list = ['name1', 'name2', 'name3'] feature2_list = [1,2,3] feature3_list = [4,5,6] dictionary_list = [] for f1,f2,f3 in zip(...
by helpme
Wed Aug 16, 2017 10:49 am
Forum: Python
Topic: How to combine these 3 lists into a single list of dictionary?
Replies: 7
Views: 953

Re: How to combine these 3 lists into a single list of dictionary?

I found the solution with the help of a guru.

Code: Select all

dict_list = [{'feature1': f1, 'feature2': f2, 'feature3': f3} for f1, f2, f3 in zip(feature1_list, feature2_list, feature3_list)]
by helpme
Wed Aug 16, 2017 10:26 am
Forum: Python
Topic: How to combine these 3 lists into a single list of dictionary?
Replies: 7
Views: 953

How to combine these 3 lists into a single list of dictionary?

I have been grappling with this problem for some time. I have 3 python lists. feature1_list = [name1, name2, name3] feature2_list = [1,2,3] feature3_list = [4,5,6] I would like to combine these 3 lists into a list of dictionary that looks like this; dictionary_list = [{'feature1': 'name1', 'feature2...
by helpme
Sun Aug 30, 2015 1:06 am
Forum: General discussion
Topic: Why was Broadcom BCM2836 chosen as the CPU for RPi?
Replies: 9
Views: 8401

Re: Why was Broadcom BCM2836 chosen as the CPU for RPi?

Intel processors are (a) expensive compared to ARM chips, and (b) power hogs compared to ARM chips. One factor behind the choice of Broadcom is that Eben Upton and some of the others who did the initial work on the Pi work or worked for...Broadcom. Broadcom was generous enough to allow the RPF to b...
by helpme
Sun Aug 30, 2015 12:25 am
Forum: General discussion
Topic: How does Rpi keep its price so low as USD35?
Replies: 4
Views: 820

How does Rpi keep its price so low as USD35?

Rpi is really cheap at USD35. Thank you very much. Suppose a competitor wants to launch a similar board. What makes Rpi able to keep it cheaper than its competitor? How does Rpi keep its price so low as USD35?
by helpme
Sun Aug 30, 2015 12:22 am
Forum: Compute Module
Topic: Not SODIMM compatible
Replies: 1
Views: 686

Not SODIMM compatible

What is meant by the compute module not being SODIMM compatible?

https://www.raspberrypi.org/documentati ... modelbplus
Note the device is NOT SODIMM compatible, it just repurposes the connector.
by helpme
Sun Aug 30, 2015 12:20 am
Forum: Compute Module
Topic: Increase flash memory of compute module
Replies: 8
Views: 2617

Increase flash memory of compute module

The flash memory is currently at 4GB. Is it possible to increase it to 8GB? If yes, how? If no, why not? https://www.raspberrypi.org/documentation/hardware/raspberrypi/models/README.md#modelbplus The compute module is intended for industrial applications, it is a cut down device which simply include...
by helpme
Sun Aug 30, 2015 12:08 am
Forum: General discussion
Topic: Why was Broadcom BCM2836 chosen as the CPU for RPi?
Replies: 9
Views: 8401

Why was Broadcom BCM2836 chosen as the CPU for RPi?

Given that there are plenty of processors out there, why was Broadcom BCM2836 chosen as the CPU for RPi? What were the advantages of BCM2836 versus the other CPUs out there? For example, why not choose Intel CPUs which are quite a safe choice given the Intel brand? (I'm not related to Intel)
by helpme
Sun Aug 30, 2015 12:05 am
Forum: General discussion
Topic: What are some examples of commercial products using RPi?
Replies: 12
Views: 8188

What are some examples of commercial products using RPi?

Are there commercial products today selling in the market that are based on the Raspberry Pi today? If yes, are they a commercial success? What are the difficulties when commercializing products using RPi?
by helpme
Wed Jul 22, 2015 12:24 pm
Forum: General discussion
Topic: What are some off-the-shelf cigarette smoke sensors for Rpi?
Replies: 10
Views: 3167

Re: What are some off-the-shelf cigarette smoke sensors for

There's some stuff for hacking a regular 9V ionising smoke detector (like the ones mounted in my house) out on the internet. Cigarette smoke is no different to the smoke from burning the toast or setting fire to waste paper bin (which was the cause of the last time we had our alarms going off - due...

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