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by karrika
Sun Sep 15, 2019 7:40 pm
Forum: General discussion
Topic: GPIO access with Pi 4 Flirc Case
Replies: 6
Views: 246

Re: GPIO access with Pi 4 Flirc Case

I just milled away the pillars just enough to fit a normal ribbon connector. You have to mill away metal all the way to the screw holes.
by karrika
Thu Sep 12, 2019 11:00 pm
Forum: Graphics, sound and multimedia
Topic: fruitbox MP3 jukebox
Replies: 1061
Views: 193491

Re: fruitbox MP3 jukebox

Hi Mike, Going to make a big post but here's the mods I did to the Wurly skin for video to play between the song lists. Like you said, it's probably just a built in delay somewhere in the cfg. For others who want to do this you also has to copy song_video.txt from the MikeTV skin. Thanks for pointi...
by karrika
Tue Sep 10, 2019 9:38 am
Forum: General discussion
Topic: How to make money with a Raspberry Pi?
Replies: 40
Views: 1618

Re: How to make money with a Raspberry Pi?

I have solved a lot of practical problems with a Pi. It is a really nice computer for controlling things around us. A few money generating things: I have used it for years to control lights and sound for theater plays. This saves lots of money as you don't need to hire a technician for the show. I u...
by karrika
Tue Sep 03, 2019 8:38 am
Forum: General discussion
Topic: How to INSTALL Linux onto a Raspberry 4?
Replies: 20
Views: 864

Re: How to INSTALL Linux onto a Raspberry 4?

To the PI Models(including PI 3 B/B+), the key problem is how to booting from the installing DVD? This problem is also with other Linux releases, such as CentOS . If one can't booting from the installing media, there's no possibility to INSTALL OS onto a PI This sounds so pessimistic. There is also...
by karrika
Tue Aug 27, 2019 4:40 am
Forum: General discussion
Topic: Raspberry Pi 4 Heatsink vs Fan vs Flirc Case
Replies: 66
Views: 13536

Re: Raspberry Pi 4 Heatsink vs Fan vs Flirc Case

I have used FLIRC cases for all my pi's. The new Pi4 FLIRC case has the same flaw as the older ones. You cannot easily use a 40-pin ribbon cable because the two screw poles are too thick for the connector. So I routinely mill away the metal all the way to the screw to fit in Black Hat3r cable. So my...
by karrika
Fri Aug 16, 2019 5:28 pm
Forum: Graphics, sound and multimedia
Topic: fruitbox MP3 jukebox
Replies: 1061
Views: 193491

Re: fruitbox MP3 jukebox

Hi karrika If you let me know exactly how you want the skin to behave I can create it for you Cheers Mike Wow! That would be super! The thing is that I have written a new game called "On Duty" for the Atari Lynx handheld console. For some strange reason I got a desire to visit Portland Retro Gaming...
by karrika
Fri Aug 16, 2019 4:00 am
Forum: Gaming
Topic: Simulated novel
Replies: 7
Views: 2035

Re: Simulated novel

I assume that "Visual novel" is closer to what you are looking for.

Two years ago I found a version of Google Blocks with a Visual novel addition for some retro platforms. But I am not aware if any exist for Raspberry Pi.
vn.png
vn.png (130.15 KiB) Viewed 2024 times
Creating some custom primitives for scratch would be a great idea.
by karrika
Fri Aug 16, 2019 3:25 am
Forum: Graphics, sound and multimedia
Topic: fruitbox MP3 jukebox
Replies: 1061
Views: 193491

Re: fruitbox MP3 jukebox

Aaaaaaannnnnnnddddddd . . . done! Does it also play the disc changing mechanism for ordinary tunes? I am planning to embed a 10" HDMI monitor in a printed jukebox frame and having video also would be cool. http://79.125.115.174/pics/wurlizer.jpg The print is A2 sized photo on a 5mm styrox plate (€3...
by karrika
Tue Aug 13, 2019 1:44 am
Forum: Graphics, sound and multimedia
Topic: fruitbox MP3 jukebox
Replies: 1061
Views: 193491

Re: fruitbox MP3 jukebox

As the source is available I believe the best thing would be to play video clips full screen using omxplayer and then return to the application if the video is interrupted or it ends. The MikeTV video does not work full speed on a PiZero but omxplayer does. So just start coding and make a pull reque...
by karrika
Tue Aug 13, 2019 1:24 am
Forum: Other projects
Topic: Autonomous Boat
Replies: 15
Views: 1914

Re: Autonomous Boat

Sounds like a perfect find. You have all the sensors required for sailing. It does provide the raw sensors. Perhaps the navigation software could offer some Fusion Filter module to make the reliability good enough for real sailing. As this has GNSS you can get pretty accurate feedback to your compas...
by karrika
Fri Aug 09, 2019 5:55 pm
Forum: Other projects
Topic: Aluminum enclosure for Raspberry Pi
Replies: 44
Views: 39935

Re: Aluminum enclosure for Raspberry Pi

I just received a Pi4 FLIRC case. With web browsing the temp = 45 C. Not bad.
by karrika
Fri Aug 09, 2019 5:00 pm
Forum: Other projects
Topic: Autonomous Boat
Replies: 15
Views: 1914

Re: Autonomous Boat

Hi guys, If you cannot afford expensive gyros then there is one very nice way of combining the sensors found on a mobile phone or some HAT board. See the clip at http://x-io.co.uk/open-source-imu-and-ahrs-algorithms/ and the initial paper published by Madgwick. At the end of the paper there is a ver...
by karrika
Fri Jul 19, 2019 7:19 pm
Forum: Other projects
Topic: Autonomous Boat
Replies: 15
Views: 1914

Re: Autonomous Boat

I'm currently working on this autonomous boat project using Raspberry Pi 3B+. The idea is to use the GPS and compass to implement the autonomous system. However, I am not sure which components (GPS & Compass) to use in the project. Are there any recommendations on the GPS and Compass that are suita...
by karrika
Thu Jun 06, 2019 7:03 am
Forum: General discussion
Topic: marine navigation
Replies: 6
Views: 516

Re: marine navigation

The mobile phones and tablets are currently taking over leisure boat navigation. One really cool navigational software for tablets is seaIQ (.http://seaiq.com/) It is widely used by professional pilots. For a sailing boat that is a good tool.
by karrika
Sun Mar 24, 2019 7:37 pm
Forum: General discussion
Topic: 6.5 inch touch screen for Raspberry Pi 3
Replies: 10
Views: 749

Re: 6.5 inch touch screen for Raspberry Pi 3

Get one of the screens with a nice frame and put it outside. This is what I did on an Atari Lynx when I wanted a screen that was much bigger than the original.

Image
by karrika
Fri Mar 15, 2019 8:52 pm
Forum: Troubleshooting
Topic: RPi1 with bad contact on the SD card port
Replies: 4
Views: 421

Re: RPi1 with bad contact on the SD card port

I broke my Pi Zero SD connector. One way to fix this is to buy a micro SD cart that comes with an adapter. The adapter can be soldered to the board and the microSD cart can be inserted and removed from the adapter. Not the most stylish design but cheap :)
Image
by karrika
Sat Mar 09, 2019 5:27 pm
Forum: The MagPi
Topic: QLC+ scene cap on rPi?
Replies: 1
Views: 1843

Re: QLC+ scene cap on rPi?

Memory will pose some limit. But I don't really understand why you would need a huge number of scenes. There is other kind of tools for large arrays of lights like rgb snakes and rgb panels the may better work for large number of lights. You could also use chases for controlling sequences of light c...
by karrika
Thu Dec 27, 2018 6:17 pm
Forum: Other projects
Topic: Controlling RPIs on network via MQTT Mosquitto
Replies: 1
Views: 670

Re: Controlling RPIs on network via MQTT Mosquitto

Nice interface. Thanks for sharing.
by karrika
Fri Nov 16, 2018 9:36 pm
Forum: Other projects
Topic: Using PI for ship tracking via API
Replies: 3
Views: 2525

Re: Using PI for ship tracking via API

I have been using a fairly simple system for a long time. Collect lat/lon from each vessel to a text file every 5 minutes. Use rsync to send the file to shore every hour. The name of the file is the date. When the date changes the data starts going to a new file. You can easily monitor the files dur...
by karrika
Mon Oct 22, 2018 7:21 pm
Forum: Automation, sensing and robotics
Topic: Connecting Pi to reed switches on long cable
Replies: 10
Views: 1872

Re: Connecting Pi to reed switches on long cable

Using GPIO lines for detecting a reed relay will have spurious noise on the line. Your best bet is to read the data a few times before accepting the value. read_relay() sleep 50ms read_relay() sleep 50 ms read_relay() If all these read_relay()'s had the same value you can rely on it. If the values w...
by karrika
Thu Aug 16, 2018 8:39 am
Forum: Other projects
Topic: what to do with an old police scanner.
Replies: 11
Views: 2199

Re: Not sure where else to ask this....

A Pi has audio out. But you may need a little amplification to feed the sound to the speakers. Buttons can be connected to GPIO pins for detecting when you press them. The dials could be read with some electronics magic. LED's can be controlled by a Pi. The question remains... What should it become?...
by karrika
Fri Aug 03, 2018 4:46 am
Forum: Graphics, sound and multimedia
Topic: fruitbox MP3 jukebox
Replies: 1061
Views: 193491

Re: fruitbox MP3 jukebox

My fruitbox starts at boot. It is a Pi3 plus 7" touch screen. At the end of my .bashrc I just added: cd /home/pi/rpi-fruitbox sudo ./fruitbox --cfg skins/TouchOne/fruitbox.cfg And of course I choose automatic log-in at startup from raspi-config so that I don't have to enter a password. And choose to...
by karrika
Sun Jul 29, 2018 4:45 am
Forum: Graphics, sound and multimedia
Topic: Recommendations for a little hdmi monitor
Replies: 7
Views: 1357

Re: Recommendations for a little hdmi monitor

I am using the same LCD screen with two add on cards as well. The solution for me was to buy a HAT stack board from Pimoroni. You get both touch screen and can use external cards. I decided to go with PiZero as it dud not have a 49 pin connector. So I also soldered HAT connector on the Pi and could ...
by karrika
Sun Jul 29, 2018 4:33 am
Forum: Advanced users
Topic: New RT (Real Time) kernel branch
Replies: 45
Views: 14339

Re: New RT (Real Time) kernel branch

For high speed streaming I always use 3 buffers. One buffer for reading in data. When it is full continue with buffer 2. When it is full continue with buffer 3. Once a buffer is full start processing it. Stream out processed buffers in the same fashion as while reading. All these 3 buffers are share...
by karrika
Mon Jul 09, 2018 11:52 am
Forum: Graphics programming
Topic: Tilengine - 2D retro graphics library with raster effects
Replies: 21
Views: 11091

Re: Tilengine - 2D retro graphics library with raster effects

Thanks! I did a small test run on it on a 64 bit Ubuntu. The install fails because the path for the library is Tileengine/lib when the install script expects the library to be at Tileengine/linux_x86_64/lib. On the other hand the C-compiled versions seem to dump core with Program received signal SIG...

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