Raspberry Pi Forums

MarkHaysHarris777

My test suite for A/D D/A compiled without errors on the 3B; but the atod.c program hangs forever in read_adc(chan) The program prompts for the channel, sets up spi, gpio, etc and then starts the read loop() which fails immediately with the hang in read_adc(chan). I tried both GPIO08 and GPIO07 (rec...

MarkHaysHarris777

Also, you do have the manual, for the Gertboard, yes? You may find it more useful, and more fun, to program the Atmel Atmega328P AVR on the Gertboard to get your analog readings. The 328P can pass the values back on serial. The downside is that there is some minimal setup that has to be done from Go...

MarkHaysHarris777

Here is the atod.c gertboard A/D demo code from 2013; I have not tested it yet... later tonight... but I thought I'd pass it along so that you can have it to study, or try ! // // Gertboard Demo // // SPI (ADC/DAC) control code // // This code is part of the Gertboard test suite // // // Copyright (...

MarkHaysHarris777

what do we mean that its loaded by default; I guess an update upgrade doesn't pull it in, ey? It means that if you download and install the latest Raspbian image you will find that it is already installed. If you are upgrading from an earlier image you will need to install it manually Thank you for...

MarkHaysHarris777

edit: OP updated code section v.02j {final} The last phase of this AVR programming experiment was to provide dual controls (serial interface, & full button interface). I added button3 and I redesigned the sleep_mode to be an intermediate command interface; button3 enters and exits the sleep_mode com...

MarkHaysHarris777

pigpio is now delivered as an ready installed part of Raspbian. I'm confused about that, because I thought I had the latest Raspbian on my three PI3B units, and none of them have pigpio as yet... I was getting prepared to load v3 actually... ... so what do we mean that its loaded by default; I gues...

MarkHaysHarris777

@MarkHaysHarris777 Thank you. I was not aware of Piscope but it looks like it does everything that I require in this instance. Whether or not, I can get it up and running maybe another thing though! Don't thank me, its the brain child of Joan (she is active here and may comment depending on her moo...

MarkHaysHarris777

dygraspi wrote:I would like to do just bridge/router .
I will connect my raspberry pi2 to exist dsl modem

Thanks for your answer

It can't be used as a wired router, because it only has one NIC.

... it can be used as a wifi bridge to wired network though... works great !

MarkHaysHarris777

Could you use this?

MarkHaysHarris777

I haven't looked at it recently but I have Programming: Principles and Practice Using C++ which was written by the author as a university class. I haven't gotten through it, but I plan to this summer. ... yes, and I'm not saying you (nor anyone else) should not try; and by the way, that book is goo...

MarkHaysHarris777

Don't forget bash scripting, and TclTk (and wish)

MarkHaysHarris777

I'm not sure what the boiling point of water has to do with anything. Apart from being a temperature reference. Yes; its a reference, mostly for the English speakers on this side of the pond... who still for the most part don't think in c. The idea is that this reference is 212F (that's an F bomb!)...

MarkHaysHarris777

... but I'm sure I'm going to need more than one book to learn. You're going to need more than any book(s) ! ... no offence. Its just true. Audit a good class at the U. Learning C++ is NOT about learning a new language syntax... its about learning a paradigm (a philosophy) regarding OO analysis and...

MarkHaysHarris777

... is the Gertboard compatible with Pi 3? Yes... the Gertboard will work with the 40 pin PIs (uses first 26 pins if plugged in) and is 100% compatible, except that the Gertboard pin 21 is actually PI pin 27; however ... ... I have learned that the best way to use the Gertboard with the PI2B and th...

MarkHaysHarris777

... quite safe. The Pi can run to 85°C without problems. um, not true. @MarkHaysHarris777, please withdraw that. The Pi SOC protects itself at 85°C (default) by throttling the clock. I know there are probable issues with Pi3s, but we are talking Pi2. There MAY, possibly, in extreme circumstances on...

MarkHaysHarris777

My personal cooling options have been posted here , and here This is what I always wanted to do, but my fan (12V 0.1A) doesn't start on the second and the third pin with the stock pin connector while your (5V 0,2A) seems to be perfect for the RPi. Would you suggest me to remove the plastic and use ...

MarkHaysHarris777

... quite safe. The Pi can run to 85°C without problems. um, not true. @alphajack, the PI 2B runs happily with passive cooling unless you over-clock it. The PI3B has been over-clocked from the get-go; it definitely requires 'extended' passive cooling at a minimum, and runs best with active cooling,...

MarkHaysHarris777

Sorry, i'm really just starting with my RasPi and from the rsync tutorials i have read, i didn't understand how rsync is supposed to work... rsync is an advanced topic. The only answer is to encourage you to continue to keep studying; read everything you can find about the topic, and then experimen...

MarkHaysHarris777

Wurst wrote:Moin,
danke für den Tipp. Einfacher ist immer gut.
Eine Zeichnung muss ich mal versuchen.
Gruß

Fritzing!

Gruß

MarkHaysHarris777

Well, in the mean time, you might try this:

sudo modprobe bcm2835-v4l2

cvlc v4l2:///dev/video0 --v4l2-width 1920 --v4l2-height 1080 --v4l2-chroma h264 --sout '#standard{access=http,mux=ts,dst=0.0.0.0:12345}'

(best wishes)

MarkHaysHarris777

kindly tell me where a[n] app /or guide/or i dont care what u people call it //can be foun[d] that actually streams this camera to a [IP] like every other cheep camera in the world has for the past 30 years ... Good evening, Welcome to the forum; glad to meet you. It looks like you're having troubl...

MarkHaysHarris777

SteveDee wrote:The Raspberry should be centre screen, which indicates that the view of the desktop is clipped. Try reducing the geometry (say 1024 x 768 as a starting point).

That is definitely the problem... reduce the geometry and voila!

(another thing you might try is a notebook running Mint gnu+linux ! )

MarkHaysHarris777

fanrasppi7.jpg This fan measures 40x40x10mm; is 5v brushless, and is powered from pin2(5v) and pin9(ground). The fan draws 140ma and is mounted over a 30mm whole cut through the top bezel with a small dremel tool, just above the T220 heatsink. The idle temps on this unit are my best so far coming i...

MarkHaysHarris777

Joan, you rock !

... thanks for your good work on this/ brilliant!

MarkHaysHarris777

It would probably be cheaper to buy a hundred thousand white beads and then dye them in colour batches. That is thinking out of the bead box (I love it!)... or, how about just DIY making a bead machine that produces the beads she needs (all the same) on a wire ring... My daughter not only wants to ...

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