Raspberry Pi Forums

karrika

If you feel that writing a board game would be fun then do it. There is all kind of competitions for writing a game in 7 days like 7DRL or https://pyweek.org/ . You could have a look at the source codes of games other have written. If you keep to the same level of difficulty as these games written i...

karrika

If you don't want to connect two devices to the same SPI bus there is also a second SPI bus available. http://pinout.xyz/pinout/spi And I know that you can connect many devices to the SPI bus. My Atari Lynx cart programmer has two chips connected to one SPI bus. Works like a dream. But you need to d...

karrika

The charm with Basic was that compiler was built-in to the language. You could run 20 PRINT "Hello World!" It is not so far from Python. It also has a built in compiler in the language. print "Hello World!" In reality Python is the modern Basic. The only thing that may be confusing is that the inden...

karrika

Have a Look over the kickstater project i hope it may solve your problem. https://www.kickstarter.com/projects/1915118535/uart-hat-for-raspberry-pi According to the comments section from January. @Erki - Shipping? Not likely. According to an earlier message, this company has been dissolved. They ha...

karrika

There is also a nice player called omxplayer. omxplayer -o local --loop sound.mp3 The keyword "local" directs the sound to the GPIO pins you have chosen for audio instead of HDMI. You may want to create a dt blob with the correct audio pin settings. I have an example at discohat.com/miscap. /* Audio...

karrika

There is actually one technique for creating a gaming rig with multiple PiZero's. For Atari Lynx there exists something called ComLynx for connecting up to N Lynxes together for multiplayer games. Many carts support 4 players. Championship Rally, Xenophobe, Checkered flag, Slime world, California Ga...

karrika

CarlRJ wrote:I still maintain that the recently announced software for the Raspberry Pi is named after my cat, Pixel.
The attachment Pixel.jpg is no longer available

We should really make a wallpaper of Pixel to replace my current one.

: pussinboots.jpg (26.01 KiB) Viewed 813 times

karrika

Sounds interesting.

The connection is using the UART. So this "display" does not show the Raspberry Pi screen at all.

You can send bytes to the eInk display to draw your own drawings. The commands understood by the eInk display was not explained in the ad.

karrika

If the room is dark you could just use a LED based projector. It works for retro gaming but not so well for movies due to low pixel count (800 x 480 pixels). It also has HDMI input which means that it works directly with Raspberry Pi. And no expensive bulbs to wear out :) Here I am playing Zaku on a...

karrika

No problem. Assigning a date to startdate: startdate=`date -d 2016-10-10` Assigning dates for comparison: start01=`date -d 2016-10-24 +"%Y%m%d"` start02=`date -d 2016-11-15 +"%Y%m%d"` Comparing two integers if (($start02 > $start01)); then echo yes else echo no fi The OR operation is || and the AND ...

karrika

You could install the command "at". sudo apt-get install at With the at-command you can start something at a specific time. at -f script1.sh -t YYMMDDhhmm To see which jobs you have in your queue. atq To remove jobs from the queue atrm jobnr In your script file you may (or may not) want to use lock ...

karrika

I haven't tried USB audio but have been tempted as there is some static on the speaker. Don't know if that's the amp or the pi. Also curious as to whether this would make any difference. Last summer the natural Pi audio through the 3.5mm plug was much better than before. We used it for all sound at...

karrika

Da9L wrote:Nope unfortunately not, I've tried to move it so close that it is touching the unit, and i've also attached an antenna.

17.3mm antenna wire? It makes a difference to have it the right length.

karrika

Thank you for publishing the code. I found out that squeezelite is no longer found at googlecode. Could the binary be hosted at PiRadio? (I did find a file with the same name at https://github.com/Hypfer/squeezelite-downloads/blob/master/squeezelite-armv6hf ) I have used squeezeplayer on my android ...

karrika

ghans wrote: BTW , can't the Pis UART be overclocked ?
ghans

At DMX use the UART works nicely at 250kpbs using RS485 drivers. The cables can be really long at these speeds.

I believe that the hard limit is around 4Mbps. At these speeds you may need to pay attention to the electronics transmission line also.

karrika

We are going to see autonomous trains, cars, airplanes, ships real soon. Fortunately there is laws of how you need to design software for this kind of projects. In a nutshell you need to evaluate the risk of different components like breaks or steering. Depending on what may go wrong you estimate fr...

karrika

The Chromium browser works well as long as you don't try to watch the youtube videos in full-screen. On a Pi3 I did listen to all kind of videos for a long time and there was no stuttering in sound or video. It is definitely a great step forward.

karrika

we do have strict security to separate our office network from the Internet. All access to the internet etc, must be via separate laptops which are never connected to the work LAN. The idea behind this is that nothing from the outside should get to the restricted LAN. Running any serial communicati...

karrika

Thank you for the links. These prices are amazing. I can afford to invest €7 in proper analyser hardware. It may be worth to build a dedicated DMX analyser with the official 7" touch screen, a DiscoHAT for transmissions and the analyser for detecting what comes back. I also believe that all fixtures...

karrika

"Chromium for the Pi. This uses the Pi’s hardware to accelerate playback of streaming video content." I just upgraded my Pi 3. Is there some special "enable acceleration" commands required? I can watch the video https://www.youtube.com/watch?v=vOiUfSd3ohs smoothly on the web page. But when I go ful...

karrika

"Chromium for the Pi. This uses the Pi’s hardware to accelerate playback of streaming video content." I just upgraded my Pi 3. Is there some special "enable acceleration" commands required? I can watch the video https://www.youtube.com/watch?v=vOiUfSd3ohs smoothly on the web page. But when I go full...

karrika

Thanks Matt, your approach sounds great. It is just that I bought an Audio Injector card made by flatmax (sounds familiar...) that may already occupy the bus. It is no problem. I put in a second Pi for measuring the line. Of course I could export the clock from the sending Pi to time the operations ...

karrika

PiGraham wrote:Bitscope may be viable. Claim 10MH BW and 40 MS/s. Pi compatible USB device.
http://bitscope.com/

Thank you for the link. I will try this out. It sounds like a good design.

karrika

Thank you for all the great ideas. Both the serial chip and using pigpio directly sounds great. The DMX standard has really large tolerance for operations. The start signal is from 88us to 1000000us. Any gap between two channels can also be anything between 8us and 1000000us. In real life you cannot...

karrika

Going off on a tangent, if you need high sampling rate, big buffer and programmability to make an analyser it might be worth looking at red pitaya (200MHz input bandwidth, dual 16bit ADCs & DACs, 2.5 GS/s, Arm core, FPGA, fast RAM buffer, USB host and gadget support). It is more expensive than a Pi...

Search found 1122 matches

Re: Project Ideas for a Bachelor Project

Re: Multiple Devices to MOSI?

Re: Just to teach my kids programming the old way

Re: Second SIO/UART

Re: Raspberry Pi and Stereo Sound

Re: Raspberry Pi Zero Gaming Rig

Re: Another Pixel

Re: eInk display

Re: Creating moving pictures on the wall

Re: if - then in script

Re: if - then in script

Re: (Yet another) Vintage Pi-Radio

Re: 433 Mhz trouble

Re: (Yet another) Vintage Pi-Radio

Re: Faster serial

Re: Car Autopilot ala Aircraft

Re: Anyone notice that Pixel v51 Chromium browser is snafu'd

Re: Faster serial

Re: pigpio to sample 25ms at 1MHz?

Re: Introducing PIXEL desktop: new Raspbian release

Re: Introducing PIXEL desktop: new Raspbian release

Re: pigpio to sample 25ms at 1MHz?

Re: pigpio to sample 25ms at 1MHz?

Re: pigpio to sample 25ms at 1MHz?

Re: pigpio to sample 25ms at 1MHz?