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by karrika
Sat Apr 17, 2021 7:30 pm
Forum: Advanced users
Topic: Is it possible to set the uart to 512000 baud?
Replies: 3
Views: 340

Re: Is it possible to set the uart to 512000 baud?

All Pi's work nicely with DMX that uses 250 000 bps. (8 bit plus 2 stop bits). The length of the cables running this work well up to 400m. So doubling the speed could work.

Receving data at these speeds is problematic for a Pi. But DMX light equipment work ok.
by karrika
Fri Mar 05, 2021 5:24 am
Forum: Graphics, sound and multimedia
Topic: fruitbox MP3 jukebox
Replies: 1955
Views: 464337

Re: fruitbox MP3 jukebox

Really great! I love the extra decorations on the jukebox. You have still managed to keep the style true to the original.
by karrika
Thu Mar 04, 2021 5:40 am
Forum: Graphics, sound and multimedia
Topic: fruitbox MP3 jukebox
Replies: 1955
Views: 464337

Re: fruitbox MP3 jukebox

The video playback depends a lot of how you do it. Last year I created a tiny player called Zeroplayer. There is a topic in the "Graphics, sound and multiplayer" section. The big idea was to use omxplayer for the videos and slower players for the rest. This works with all videos on a Pi Ze...
by karrika
Wed Mar 03, 2021 6:31 pm
Forum: Graphics, sound and multimedia
Topic: fruitbox MP3 jukebox
Replies: 1955
Views: 464337

Re: fruitbox MP3 jukebox

I noticed the same thing with videos. If you play the same video a second time there is no problems. Perhaps this has more to do with how linux reads and uses the cache with fruitbox.
by karrika
Sat Feb 27, 2021 4:46 pm
Forum: Compute Module
Topic: CM4 PCB Design and Manufacturing
Replies: 40
Views: 5841

Re: CM4 PCB Design and Manufacturing

I have not created any CM 4 boards. My boards have had much lower clock rates. The pcbway was just one company that I have used a few times for pcb + assembly. If you add .com to it you get to their homepage.
by karrika
Thu Jan 14, 2021 10:29 pm
Forum: Python
Topic: Python fan for moon project
Replies: 11
Views: 725

Re: Python fan for moon project

Thanks for all the great responses, the lights are LEDs so I doubt they will produce any heat. I think I'll be fine without the fan in that case. I do have another question though, so this light has 6 LEDs that are basically meant to allow it to show six basic phases of the moon, can someone tell m...
by karrika
Thu Jan 14, 2021 3:48 am
Forum: Python
Topic: Python fan for moon project
Replies: 11
Views: 725

Re: Python fan for moon project

There is a few ways to get heat out of a box: Conducting through a piece of metal. This is the way a heatsink operates. Using air or water as conductive material. This is the way a fan operates. Using radiation. Heat can be transferred by itself like this. So if you use a fan the air must be able to...
by karrika
Thu Jan 14, 2021 3:34 am
Forum: General discussion
Topic: Poor Man's Pi Safe Backup Supply (UPS)
Replies: 57
Views: 9569

Re: Poor Man's Pi Safe Backup Supply (UPS)

This is a great design.
by karrika
Tue Jan 12, 2021 1:14 pm
Forum: Compute Module
Topic: Any Compute Module 4 sized heat sinks available?
Replies: 8
Views: 2131

Re: Any Compute Module 4 sized heat sinks available?

For my use cases the CPU load is minimal. So passive cooling is ok. But my experience tells me that I want to have almost the same temperature on the CPU core as I have on the outside metal shell. So I would like the outside shell to become hot. This means that some kind of thermal paste between the...
by karrika
Tue Jan 12, 2021 10:04 am
Forum: Compute Module
Topic: Any Compute Module 4 sized heat sinks available?
Replies: 8
Views: 2131

Re: Any Compute Module 4 sized heat sinks available?

Thanks.

I believe that something in the line of a Pi 400 could work. A large heat spread element. Perhaps I need to make the cover of metal to avoid dust and a fan. Or perhaps mix metal and plastics as they did on the FLIRC.
by karrika
Mon Jan 04, 2021 4:56 am
Forum: Off topic discussion
Topic: Am I burning out? How to turn things around?
Replies: 11
Views: 2451

Re: Am I burning out? How to turn things around?

Been there, done that - got the T-shirt, lost the hat. I also had to quit and take a giant step backwards. It was the right choice. Perhaps now is the time for finding out what you really want. For me it was dancing and acting on stage. I still make a decent living by writing code. But no more commi...
by karrika
Thu Dec 31, 2020 7:37 pm
Forum: HATs and other add-ons
Topic: Audio injector zero is live !
Replies: 8
Views: 2706

Re: Audio injector zero is live !

Now I get it! You are browsing the forum using Chrome browser and all the graphics is gone!

That i why I switched to Chromium Web Browser. For some reason Chrome drops the images all the time.
by karrika
Thu Dec 31, 2020 3:36 pm
Forum: HATs and other add-ons
Topic: Audio injector zero is live !
Replies: 8
Views: 2706

Re: Audio injector zero is live !

I am using three different Audio Injector versions. Which version are you trying to work on? The latest Raspi OS has the firmware drivers installed by default. Just add this to /boot/config.txt dtparam=i2c_arm=on dtparam=i2s=on dtparam=spi=on # Enable audio (loads snd_bcm2835) dtparam=audio=off dtov...
by karrika
Thu Dec 31, 2020 7:45 am
Forum: Raspberry Pi 400
Topic: The Raspberry Pi 400 thread!
Replies: 1075
Views: 119710

Re: The Raspberry Pi 400 thread!

I have a different one more like this https://www.adafruit.com/product/1475 I didn't buy from them I got it from an electronics shop but it's very similar. I'll have to try it out again I don't recall how it sounded but you could control the volume from the desktop this might be different now too s...
by karrika
Wed Dec 30, 2020 9:23 pm
Forum: Raspberry Pi 400
Topic: The Raspberry Pi 400 thread!
Replies: 1075
Views: 119710

Re: The Raspberry Pi 400 thread!

For the Pi 400 the easiest way is to get an USB sound dongle. Connecting HAT cards to the Pi 400 is mechanically a bit difficult as you cannot fasten the HAT card to anything. Besides USB sound cards can be cheap.
by karrika
Tue Dec 29, 2020 6:42 am
Forum: Raspberry Pi 400
Topic: Review: What a rough experience, not your new Amiga 500 :(
Replies: 53
Views: 5330

Re: Review: What a rough experience, not your new Amiga 500 :(

I do love Pinball. Specially the real mechanical thingies (coming soon to a theater near you: The Arcade That Would Not Die!). Something about the clacking and clattering and bells and horns (and constant breakdowns lol). EA Pinball Construction Set was one of if not THE favorite PC software packag...
by karrika
Mon Dec 28, 2020 8:38 pm
Forum: Raspberry Pi 400
Topic: Review: What a rough experience, not your new Amiga 500 :(
Replies: 53
Views: 5330

Re: Review: What a rough experience, not your new Amiga 500 :(

Never a big Amiga fan but did get a kick out of Worms which was one of the few I could afford at the time. I'm not sure if either of my machines still boots even if I could get to them at the bottom of the pile. Is there a Pi package for Amiga even vaguely as easy to install as DOSBox? RetroPie is ...
by karrika
Mon Dec 28, 2020 7:59 pm
Forum: Raspberry Pi 400
Topic: Review: What a rough experience, not your new Amiga 500 :(
Replies: 53
Views: 5330

Re: Review: What a rough experience, not your new Amiga 500 :(

Here is a picture of my setup to run (emulate) Amiga 500 on a Pi Zero in 2016 running one of my favourite Amiga 500 games. http://79.125.115.174/pics/HeroQuest2.jpg Later, in April 2016 I wrote an improved Hero Quest clone that outrun the Amiga 500 version. Still running on a PiZero + DiscoCap + Mis...
by karrika
Mon Dec 28, 2020 5:20 pm
Forum: Beginners
Topic: One Button / Multiple Raspberries
Replies: 20
Views: 1324

Re: One Button / Multiple Raspberries

OR you could use an opto-isolator, and thus keep ALL the Pis electrically isolated wire 3 opto-isolators in series, with one switch and resistor. wire the output of each opto-isolator to each of the pi's https://drive.google.com/file/d/1exYuwaPAgARmKWOryUAdHg64MMPi8WZQ/view?usp=sharing That is the ...
by karrika
Sun Dec 27, 2020 7:02 pm
Forum: Beginners
Topic: One Button / Multiple Raspberries
Replies: 20
Views: 1324

Re: One Button / Multiple Raspberries

Without knowing the rest of the design it is hard to give advice. My guess is that the Pi's may be related to each other in some way if they sit in the same enclosure sharing a common control. If they also share the power then these diodes protecting the inputs pins are not needed. We are talking ab...
by karrika
Fri Dec 25, 2020 12:45 pm
Forum: Beginners
Topic: One Button / Multiple Raspberries
Replies: 20
Views: 1324

Re: One Button / Multiple Raspberries

When you connect the Pi grounds to a common point the ground voltages are the same. So I see no reason why you could not connect the inputs together as well. Plus adding a button is not a problem. Am I missing something? The original question is ok imho. You can connect the Pi's this way. But be awa...
by karrika
Wed Dec 23, 2020 11:29 am
Forum: General discussion
Topic: How many RPI do you need?
Replies: 28
Views: 1896

Re: How many RPI do you need?

How many RPI do you need?
This is like asking a woman "How many pair of shoes do you need?".
- The answer is obvious.
by karrika
Tue Dec 22, 2020 9:09 am
Forum: Raspberry Pi 400
Topic: The Raspberry Pi 400 thread!
Replies: 1075
Views: 119710

Re: The Raspberry Pi 400 thread!

I have both HDMI and DVI cables that connect durectly to a Pi4. Buying a suitable cable is a good idea. More reliability, less clutter.
by karrika
Sat Dec 19, 2020 9:38 am
Forum: Raspberry Pi 400
Topic: The Raspberry Pi 400 thread!
Replies: 1075
Views: 119710

Re: The Raspberry Pi 400 thread!

After using both the Pi400, the separate Pi official keyboard mouse hub and a Pi4 with commercial high quality keyboard and mouse I have some insight to the usability. The Pi4 with a top quality keyboard and a gaming mouse is the best and most convenient solution. Definitely the choice of a serious ...
by karrika
Wed Dec 16, 2020 7:47 pm
Forum: Graphics, sound and multimedia
Topic: fruitbox MP3 jukebox
Replies: 1955
Views: 464337

Re: fruitbox MP3 jukebox

can you say me where i can find the to delete? "skins/WurlyVideo/fruitbox.cfg:Output = loading.txt" i search at, /home/pi/rpi-fruitbox-master/skins/WurlyVideo but i cant find the line... The line never got to the repository. It seems to be on my fork only. Sorry about misleading info.

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