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by mthomason
Sun Jun 12, 2016 6:14 pm
Forum: Beginners
Topic: Using one raspberry pi for 7 ultrasonic sensors, 2 camera's
Replies: 11
Views: 4002

Re: Using one raspberry pi for 7 ultrasonic sensors, 2 camer

I can tell you what you could do if you run into a problem - offload the sensors onto a microprocessor such as an Arduino (cheap Arduino Nano clones can be found for under $5), and have that report the values it gets to the Pi over i2c or a serial connection. Hmm, will there be any delays on the re...
by mthomason
Sat Jun 11, 2016 11:37 pm
Forum: Beginners
Topic: Using one raspberry pi for 7 ultrasonic sensors, 2 camera's
Replies: 11
Views: 4002

Re: Using one raspberry pi for 7 ultrasonic sensors, 2 camer

I can't tell you if it'll work. My thinking is, you'll have to try. You may find the camera data streams interfere with the timing on the ultrasonic sensors, you have to be pretty accurate at timing the "pings" on those. I can tell you what you could do if you run into a problem - offload the sensor...
by mthomason
Sat Jun 11, 2016 11:32 pm
Forum: General discussion
Topic: Can I use this 6-pin CP2102 with RPi?
Replies: 8
Views: 3902

Re: Can I use this 6-pin CP2102 with RPi?

Hopefully someone will correct me if I'm wrong - lsusb should show all connected USB devices and their device IDs, even if the drivers aren't loaded/working?

So this would indicate your CP2102 is actually broken, if I'm following correctly.
by mthomason
Sat Jun 11, 2016 7:46 am
Forum: General discussion
Topic: Zeros in stock again at Pimoroni
Replies: 18
Views: 2890

Re: Zeros in stock again at Pimoroni

mikerr wrote:Wonder if its 1 per customer per day ?
I've gone with buying one every couple of weeks, that felt like a good enough balance to give others a chance while they were in heavy demand. I wouldn't feel guilty about placing a daily order if they're still in stock the next day, though.
by mthomason
Fri Jun 10, 2016 10:45 pm
Forum: General discussion
Topic: Zeros in stock again at Pimoroni
Replies: 18
Views: 2890

Zeros in stock again at Pimoroni

https://shop.pimoroni.com/products/raspberry-pi-zero

Seems that in-stock Zeros last a little longer each time there's a new delivery, too!
by mthomason
Thu Jun 09, 2016 3:27 pm
Forum: Beginners
Topic: Pie Cluster Questions
Replies: 4
Views: 821

Re: Pie Cluster Questions

Thank you both for the answers! I was just wondering because another idea I had was a minecraft server, and I thought clustering would help. Thank you! Just to illustrate how this would work with clustering: You would need the source code to the Minecraft server. Then you'd need to figure out a way...
by mthomason
Thu Jun 09, 2016 2:47 pm
Forum: General discussion
Topic: connecting multiple sensors to a single raspberryy pi
Replies: 3
Views: 736

Re: connecting multiple sensors to a single raspberryy pi

For sensors that don't like I2C, it's worth bearing in mind that you could attach them to a cheap microprocessor which then sits on the Pi's I2C bus. That's especially useful for things like ultrasonic distance sensors that may require accurate timing.
by mthomason
Thu Jun 09, 2016 2:43 pm
Forum: General discussion
Topic: Possibilities?
Replies: 5
Views: 1388

Re: Possibilities?

Something I'd be tempted to do, if you can handle the extra payload, is this: Raspberry Pi \/ Arduino (a cheap Nano or Mini clone ought to work well, and weighs next-to-nothing) \/ Servo Driver Board, Compass/Accelerometer/Gyroscope Then use the Pi as the "brain" for things like navigation that can ...
by mthomason
Thu Jun 09, 2016 1:52 pm
Forum: General discussion
Topic: Start your engines.. pi zero in 5 minutes !
Replies: 53
Views: 8478

Re: Start your engines.. pi zero in 5 minutes !

I think to make everyone who is complaining happy... they should go ahead and create some stock for say $75 US per board available to you all. Then there's profit, you will stop complaining... and the rest of us can just accept that for now, a Pi 3 is just fine. PLEASE LOCK THIS THREAD!!!! Come to ...
by mthomason
Thu Jun 09, 2016 1:42 pm
Forum: General discussion
Topic: SSH Into Raspberry Pi from Ubuntu Virtual Machine
Replies: 2
Views: 1557

Re: SSH Into Raspberry Pi from Ubuntu Virtual Machine

Yes, you should be able to do it with a VM as long as you're able to port-forward from your router to the Ubuntu VM (or otherwise allow it direct internet access) that should work fine. I'd advise using bridging rather than NAT for the connection between the PC and the Ubuntu VM, to ensure you can c...
by mthomason
Thu Jun 09, 2016 1:33 pm
Forum: General discussion
Topic: Start your engines.. pi zero in 5 minutes !
Replies: 53
Views: 8478

Re: Start your engines.. pi zero in 5 minutes !

If there's not really enough profit margin, I don't see why they're being sold at the price they are. Because you're treating the Zero as a product to make profit off. No, I'm considering the zero as a way of making money for the charity to further the aims of the charity from the people who are pr...
by mthomason
Thu Jun 09, 2016 12:46 pm
Forum: General discussion
Topic: Start your engines.. pi zero in 5 minutes !
Replies: 53
Views: 8478

Re: Start your engines.. pi zero in 5 minutes !

Is it the RPF's fault that the Zero is an unexpected major success? em - basically yes - they are the ones artificially pricing it too low. If they price it more, it no longer serves its intended purpose, and ends up going to the people with enough money to afford it instead. It's *intended* to be ...
by mthomason
Thu Jun 09, 2016 11:16 am
Forum: General discussion
Topic: Raspberry Pi LCD issues, graphical errors and banding
Replies: 21
Views: 4097

Re: Raspberry Pi LCD issues, graphical errors and banding

D'oh, I can't believe I didn't think of that earlier. Yeah, cable thickness could well be an issue at that Amperage.

You're still getting the graphical corruption even with thicker cables, though?
by mthomason
Thu Jun 09, 2016 11:13 am
Forum: Beginners
Topic: Using LCD screen question
Replies: 3
Views: 644

Re: Using LCD screen question

On the subject of corrupting the SD card - make a backup (for most OSes, the same imaging software used to make it can also copy it in reverse back to an image on a PC hard drive) , and go experiment to your heart's content. That's how we learn :)
by mthomason
Thu Jun 09, 2016 11:08 am
Forum: Beginners
Topic: Installing a 3.5 inch Waveshare LCD with Raspberry Pi3
Replies: 54
Views: 73229

Re: Installing a 3.5 inch Waveshare LCD with Raspberry Pi3

So does this only work with the raspbian OS? I'm still a bit of a noob and was wondering if the driver could still work on retropie Thanks in advance Retropie appears to be "Raspbian plus a bunch of extra software on top", so I would imagine it's worth a try (just make sure you're prepared to refor...
by mthomason
Thu Jun 09, 2016 11:02 am
Forum: General discussion
Topic: Start your engines.. pi zero in 5 minutes !
Replies: 53
Views: 8478

Re: Start your engines.. pi zero in 5 minutes !

If there's not really enough profit margin, I don't see why they're being sold at the price they are. Because you're treating the Zero as a product to make profit off. The Foundation isn't, they have other models to do that with. They're purposely keeping it as close to cost as they dare. The Zero ...
by mthomason
Thu Jun 09, 2016 10:34 am
Forum: General discussion
Topic: Where are all the Pi's?
Replies: 17
Views: 2659

Re: Where are all the Pi's?

Incidentally, does anyone else find the current practice of selling out of Pi Zero "board only" but still having "board plus starter kit" in stock is a cynical bit of business? It can seem that way, until you realize the latter are probably the only ones the retailers are actually making any notica...
by mthomason
Thu Jun 09, 2016 10:30 am
Forum: Advanced users
Topic: Permanent mounting of GPIO wiring
Replies: 7
Views: 3742

Re: Permanent mounting of GPIO wiring

I'm soldering female headers to cheap chinese prototyping PCBs like these , so I can use them like a "hat" (minus the eeprom requirement) That way I don't end up physically modifying the Pi itself (and with my soldering skills, or lack thereof, I can see myself destroying a few if I tried), and it's...
by mthomason
Thu Jun 09, 2016 10:16 am
Forum: General discussion
Topic: Start your engines.. pi zero in 5 minutes !
Replies: 53
Views: 8478

Re: Start your engines.. pi zero in 5 minutes !

It seems to me like a matter of economics. It just isn't worth ramping up to meet demand *today*, because if they do that they'll meet that demand and suddenly have a ton of Zero production equipment and employees sitting around with nothing to do any more. Rant time. It's better to simply let the d...
by mthomason
Wed Jun 08, 2016 7:50 pm
Forum: General discussion
Topic: PI Zero Wish/Suggestion
Replies: 20
Views: 2794

Re: PI Zero Wish/Suggestion

You get what you pay for, I guess :) Personally, it's one of the main reasons I forced myself to practice soldering. I took my poor eyesight and shaky hands, practiced on a few pieces of loose wire, then clamped the Pi Zero into a set of Helping Hands and went through all 40 pins. Apparently I did i...
by mthomason
Wed Jun 08, 2016 7:45 pm
Forum: General discussion
Topic: Raspberry Pi LCD issues, graphical errors and banding
Replies: 21
Views: 4097

Re: Raspberry Pi LCD issues, graphical errors and banding

I think the box color is down to manufacturers - doing a google image search, I see red ones badged Element 14, and purple ones badged RS.
by mthomason
Wed Jun 08, 2016 6:35 pm
Forum: Beginners
Topic: Pi 2, Model B, ARM, Ubuntu 16.04
Replies: 3
Views: 981

Re: Pi 2, Model B, ARM, Ubuntu 16.04

No, Wine is just a layer to provide the Windows API, it doesn't translate i386 instructions to ARM. I think some people seem to have had some luck using QEMU, however (there's a few forum posts mentioning it, but I haven't tried it myself), and I believe there's someone selling a product that does t...
by mthomason
Wed Jun 08, 2016 6:30 pm
Forum: General discussion
Topic: Which one to buy? (Pi CPU)
Replies: 3
Views: 787

Re: Which one to buy? (Pi CPU)

It's the same thing ;) You've just run into two suppliers who have written it differently.

The Pi 3 uses a BCM2837 ARMv8 Quad-core Cortex A53 processor
by mthomason
Sat Jun 04, 2016 12:56 pm
Forum: Beginners
Topic: Multiple ADC?
Replies: 10
Views: 2905

Re: Multiple ADC?

You'll probably want an external ADC chip that can handle multiple inputs.

Adafruit have a 4-channel ADC and even have a Raspberry Pi-specific tutorial for it.
by mthomason
Sat Jun 04, 2016 12:41 pm
Forum: Beginners
Topic: Use virtual box in RPI (server headless)
Replies: 6
Views: 1186

Re: Use virtual box in RPI (server headless)

KVM might be worth a look. Beware, however, that you can't just install any OS using it, it can only give you multiple virtualized Linux instances. You're also going to be limited somewhat by the amount of RAM available, it's doubtful you'll be able to get many instances off a Pi - that'll depend, o...

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