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by bensimmo
Sun Feb 18, 2018 2:18 pm
Forum: Off topic discussion
Topic: Pi's on TV
Replies: 4
Views: 958

Re: Pi's on TV

BBC click again (so iPlayer). Honestly the only technology show on our TV and it's a short programme on the News channel. It's obviously so unimportant* that they produce a special short 15mins version (when it's only 30min to start with). https://www.bbc.co.uk/iplayer/episode/b09scjrh/click-let-the...
by bensimmo
Sun Feb 18, 2018 10:27 am
Forum: General discussion
Topic: Raspberry PI Zero W - Mounting hole size?
Replies: 12
Views: 431

Re: Raspberry PI Zero W - Mounting hole size?

Just to add for proof or anyone reading wanting more.
Use the Zero mechanical docs
https://www.raspberrypi.org/documentati ... /README.md
by bensimmo
Sun Feb 18, 2018 10:08 am
Forum: Raspbian
Topic: /etc/inittab no longer present in Raspbian Jessie?
Replies: 34
Views: 67451

Re: /etc/inittab no longer present in Raspbian Jessie?

Hit the New Topic button in a forum section.

Here's the Sound & Multimedia section
viewforum.php?f=38
by bensimmo
Sun Feb 18, 2018 9:59 am
Forum: Python
Topic: laser tripwire project change
Replies: 9
Views: 212

Re: laser tripwire project change

One of the problems with LED (&IR incl) is they just don't work well as a trip over a distance. The IR ones will trigger on sunlight (as any Wii/WiiU user will know) as well as say a red one as you don't get the sharp intensity drops/increase. Using IR on common LDRs just will not work as they are v...
by bensimmo
Sat Feb 17, 2018 8:58 pm
Forum: Python
Topic: laser tripwire project change
Replies: 9
Views: 212

Re: laser tripwire project change

They're used in schools, similar lasers come attached to all sorts now. Safety warning should also be stated for modern LEDs too. IR is still a danger, even if you cannot see it. Especially for the IR wavelengths normally used. Add it as feedback to the article (it's at the end) to give your concern...
by bensimmo
Sat Feb 17, 2018 8:47 pm
Forum: Raspbian
Topic: /etc/inittab no longer present in Raspbian Jessie?
Replies: 34
Views: 67451

Re: /etc/inittab no longer present in Raspbian Jessie?

These may or may not be of use as I've not used MIDI over UART. It is on Jessie, so one Raspbian version older :-( but they tend to be the same/similar. Fluisynth https://lucidbeaming.com/blog/running-fluidsynth-on-a-raspberry-pi-zero-w/ MIDI talk. https://www.raspberrypi.org/forums/viewtopic.php?t=...
by bensimmo
Sat Feb 17, 2018 8:23 pm
Forum: Raspbian
Topic: /etc/inittab no longer present in Raspbian Jessie?
Replies: 34
Views: 67451

Re: /etc/inittab no longer present in Raspbian Jessie?

Wheezy is two Debian versions before Stretch. (Jessie being the one in the middle we have just moved from). If you come from a Windows background. It's like running Windows 7 instead of windows 10 (with Windows 8 in between). You'll need to work around and figure out the new methods unfortunately, o...
by bensimmo
Sat Feb 17, 2018 11:52 am
Forum: Advanced users
Topic: GPS module for Raspberry Pi 3 ?
Replies: 2
Views: 116

Re: GPS module for Raspberry Pi 3 ?

Buy the easiest for you to use. Have a play and learn how it all works (uBlox6 work well for me, I use UART pins to connect with it.) The module does all the hard maths work, you just read the NMEA data it provides. NMEA is just a list of various information it provides, Log/Lat coordinates, number ...
by bensimmo
Sat Feb 17, 2018 11:48 am
Forum: Beginners
Topic: Measuring speed using IR LED Phototransistor
Replies: 10
Views: 271

Re: Measuring speed using IR LED Phototransistor

Yep, they are slower to respond too (at least the ones I use too, so not to be used for microsecond timing if using leading/trailing edge). But you get the advantage of, cheap, can use visible light, and good for proof of concept before a wavelength is needed. Visible light is much easier to see tha...
by bensimmo
Fri Feb 16, 2018 8:49 pm
Forum: The MagPi
Topic: HackSpace magazine :-)
Replies: 0
Views: 101

HackSpace magazine :-)

I read the first edition and it was nice (and free :-)). I didn't get the second or third but read them in pdf to see how they where. Though when a MagPi subscription offer came up, I subscribed from issue 4 association far so good. I'll enjoy the read. Which came while I was away and turned up with...
by bensimmo
Fri Feb 16, 2018 8:34 pm
Forum: Beginners
Topic: Distance sensor that penetrates glass
Replies: 20
Views: 566

Re: Distance sensor that penetrates glass

The best way is to research what is used (car bumper reversing sensors?) Camera sensors..etc. Buy a GPS but check the specs on how it works. Buy the 6 or 9dof sensors and play with them. (Hint SenseHAT emulation is free, you could start with that) and get a feel of how they work. You could probably ...
by bensimmo
Fri Feb 16, 2018 8:14 pm
Forum: Beginners
Topic: Measuring speed using IR LED Phototransistor
Replies: 10
Views: 271

Re: Measuring speed using IR LED Phototransistor

I've done this many times as it's used for lightgates in science/physics. It's a simple switch at its basic level. Either a led or a laser if you need a more directional beam of light. That and a LDR works fine (or a photodiode too) - Laser/LED just powered off the Pi pins (5V or 3.3V as needed, wit...
by bensimmo
Tue Feb 13, 2018 3:38 pm
Forum: Beginners
Topic: Distance sensor that penetrates glass
Replies: 20
Views: 566

Re: Distance sensor that penetrates glass

Interesting :-) I wonder if they are using that in phones now or 'garmins' now. Though it is always positional that has had problems and the suddenly jump in max speeds that can be seen. It's one thing I've never seen tested in phone reviews (it always that pointless camera tat reviewers car about, ...
by bensimmo
Tue Feb 13, 2018 10:50 am
Forum: Beginners
Topic: Distance sensor that penetrates glass
Replies: 20
Views: 566

Re: Distance sensor that penetrates glass

They know you have moved but not necessarily how far or to a spec someone would want to stop crashes. It generally does the job, needs interpolation and best guessing. Hence augmenting it with the other sensor devices. How that is achieved will be some research. Anyone that cycles can tell you that ...
by bensimmo
Tue Feb 13, 2018 9:51 am
Forum: General discussion
Topic: Awesome Projects
Replies: 17
Views: 887

Re: Awesome Projects

Everything is Awesome, especially if it involves Lego. I think the medical field applications and the large 3D body scanners are pretty Awesome. Or the portable low power schools that have cropped up in places with little money, a room for a school and next to no electricity are also pretty Awesome....
by bensimmo
Mon Feb 12, 2018 9:31 pm
Forum: Beginners
Topic: Distance sensor that penetrates glass
Replies: 20
Views: 566

Re: Distance sensor that penetrates glass

On the other side speed from GPS is not perfect, at slow speeds it'll not have a clue as it hardly knows where you are in the first place (look up accuracy and the new wave of 30cm compared to 5m+ are probably not available for a low cost it's not that old a tech yet and are not in phones either as ...
by bensimmo
Mon Feb 12, 2018 9:21 pm
Forum: Python
Topic: Does Python do A/V/U and call itself?
Replies: 2
Views: 134

Re: Does Python do A/V/U and call itself?

Goto the python website, they have all its built in commands. But it'll do what it is programmed to do. Often you just find modules (OpenCV for example) and use the time and effort they have spent. Feeding back your own ideas and problems, the best take them on board Otherwise it's write your own fr...
by bensimmo
Sun Feb 11, 2018 2:44 pm
Forum: General discussion
Topic: vivaldi installation
Replies: 15
Views: 419

Re: vivaldi installation

And check the comments to get it to actually install.
by bensimmo
Sun Feb 11, 2018 10:46 am
Forum: Camera board
Topic: University Project- Please help
Replies: 9
Views: 362

Re: University Project- Please help

Twitter is often used for messaging as well. Look in the education tutorials for how that can be used.
by bensimmo
Sat Feb 10, 2018 12:16 pm
Forum: General discussion
Topic: Awesome Projects
Replies: 17
Views: 887

Re: Awesome Projects

Watching the young kids smile when they have managed to get an LED to turn on

Seeing some of the bizzar things the kids can come up with in Scratch.
by bensimmo
Fri Feb 09, 2018 1:50 pm
Forum: Off topic discussion
Topic: Steam (Possibly Terraria)
Replies: 5
Views: 421

Re: Steam (Possibly Terraria)

That wasn't the question though.
You can get Terraria via other methods other than Steam.


(I forgot, you can get it on POWER processors too (Consoles) and Android isn't the only ARM devices that have it for arm. Consoles too.)

And anyway Ducky has never replied back so who really cares ;-)
by bensimmo
Thu Feb 08, 2018 1:13 pm
Forum: General discussion
Topic: Wireless firmware testers wanted
Replies: 45
Views: 3882

Re: Wireless firmware testers wanted

Seems like the other WiFi firmwares Atheros, Realtek etc also have an update as they all came down too.
by bensimmo
Wed Feb 07, 2018 4:26 pm
Forum: Teaching and learning resources
Topic: Help with source for KS2 info on radio waves/antennas
Replies: 3
Views: 190

Re: Help with source for KS2 info on radio waves/antennas

Not for how they work at KS2

But he can make the Pi into a simple FM transmitter, just for fun, and pick it up on the household/car/mobile phone radio
by bensimmo
Wed Feb 07, 2018 3:29 pm
Forum: Off topic discussion
Topic: Steam (Possibly Terraria)
Replies: 5
Views: 421

Re: Steam (Possibly Terraria)

It seems they ignore the fact that there are other processors than Intel/AMD (x86) processors in the world, to the degree that in their requirements they just ask for "an 1.6GHz processor". That means they don't seem they have any idea/incentive to port it to any other CPU. So the answer is NO! The...
by bensimmo
Wed Feb 07, 2018 12:21 pm
Forum: Camera board
Topic: best way to connect 35 cameras
Replies: 11
Views: 564

Re: best way to connect 35 cameras

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