Ich hatte dieses Thema in einem anderen Artikel bereits kurz angesprochen, doch möchte ich in diesem Artikel näher darauf eingehen, da vor allem Anfänger damit nichts anfangen können und sich gar nicht bewusst sind dass es sich hierbei um ein Warnsignal handelt.
Warum erscheint dieses Quadrat und was bedeutet es?
Das bunte Quadrat erscheint, wenn dein Raspberry Pi eine zu geringe Spannung vom Netzteil erhält. Sinkt die Spannung unter 4,65 Volt, dann erscheint das Quadrat und signalisiert dir, dass dein Pi mehr Spannung benötigt um fehlerfrei arbeiten zu können. Zudem wird der Turbo-Modus während dieser Zeit aus Sicherheitsgründen deaktiviert, um das Risiko eines Systemabsturzes zu minimieren.
Quelle: Raspberry Entwickler Team
Welche Probleme entstehen dadurch?
Natürlich kann es sein, dass vorerst keine Probleme dadurch entstehen und alles weiterhin läuft wie es soll.
Folgende Probleme können aber auftreten:
- dein Pi friert einfach ein, sodass ein Neustart erforderlich ist
- angeschlossene USB-Geräte bekommen ebenfalls zu wenig Spannung und laufen instabil oder gar nicht
- dein Pi läuft im allgemeinen instabil, reagiert hin und wieder langsam und träge auf Eingaben
- Turbo-Modus deaktiviert
Was kann man dagegen tun?
Im ersten Moment gibt man gerne dem Netzteil die Schuld. Das kann natürlich auch sein doch kann ich aus eigener Erfahrung sagen, dass es oftmals am USB Kabel zwischen Netzteil und Raspberry Pi liegt.
USB-Kabel ist eben nicht gleich USB-Kabel. Ich habe mir dafür extra ein USB-Strommessgerät gekauft um zu prüfen wie viel von den 5V Spannung bei verschiedenen USB-Kabeln am Ende auch wirklich ankommen. Man kann es sich vielleicht schon denken, die Unterschiede waren gewaltig.
Nicht jedes USB-Kabel ist für eine hohe Stromlast ausgelegt. Viele günstige Kabel müssen nur Daten übertragen, aber keine hohe Stromlast.
Bevor du dir also ein neues Netzteil kaufst, würde ich definitiv vorher noch andere USB-Kabel testen. Die USB-Ladekabel von Tablets sind z.B. immer sehr zu empfehlen.
Beachte bitte auch, dass die Länge des Kabels eine Rolle spielt. Je länger das Kabel, desto größer der Spannungsabfall.
Ich hatte auch oft das Problem mit dem Quadrat und setze seitdem nur noch diese hochwertigen USB-Kabel ein.
Diese Kabel dienen nur der Stromübertragung. Es sind keine Datenleitungen vorhanden, was aber ermöglicht, dass die Stromleitungen dafür dicker ausfallen und dadurch kommt beim Raspberry auch die volle Leistung des Netzteils an.
Ideal für den Raspberry Pi!
Diese USB-Ladekabel kosten zwar etwas aber je nach Variante bekommt man immer mindestens zwei davon und kann diese auch prima für weitere Geräte nutzen um diese schneller aufladen zu können.
Wenn du ausschließen kannst dass es nicht am USB-Kabel liegt dann kann ich dieses Netzteil von Amazon Basics empfehlen. Gut & günstig und verrichtet seit Monaten gute Dienste bei mir.
Mit 2,1 Ampere bietet es auch genügend Leistung und Reserven. 🙂
Du hast eigene Erfahrungen mit dem regenbogen Quadrat oder hast weitere Tipps zur Behebung? Dann ab in die Kommentare damit! 🙂
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Apple now has Rhapsody as an app, which is a great start, but it is currently hampered by the inability to store locally on your iPod, and has a dismal 64kbps bit rate. If this changes, then it will somewhat negate this advantage for the Zune, but the 10 songs per month will still be a big plus in Zune Pass‘ favor.
I’ll gear this review to 2 types of people: current Zune owners who are considering an upgrade, and people trying to decide between a Zune and an iPod. (There are other players worth considering out there, like the Sony Walkman X, but I hope this gives you enough info to make an informed decision of the Zune vs players other than the iPod line as well.)
If you’re still on the fence: grab your favorite earphones, head down to a Best Buy and ask to plug them into a Zune then an iPod and see which one sounds better to you, and which interface makes you smile more. Then you’ll know which is right for you.
Zune and iPod: Most people compare the Zune to the Touch, but after seeing how slim and surprisingly small and light it is, I consider it to be a rather unique hybrid that combines qualities of both the Touch and the Nano. It’s very colorful and lovely OLED screen is slightly smaller than the touch screen, but the player itself feels quite a bit smaller and lighter. It weighs about 2/3 as much, and is noticeably smaller in width and height, while being just a hair thicker.
Hands down, Apple’s app store wins by a mile. It’s a huge selection of all sorts of apps vs a rather sad selection of a handful for Zune. Microsoft has plans, especially in the realm of games, but I’m not sure I’d want to bet on the future if this aspect is important to you. The iPod is a much better choice in that case.
Hands down, Apple’s app store wins by a mile. It’s a huge selection of all sorts of apps vs a rather sad selection of a handful for Zune. Microsoft has plans, especially in the realm of games, but I’m not sure I’d want to bet on the future if this aspect is important to you. The iPod is a much better choice in that case.
This is getting a bit more subjective, but I much prefer the Zune Marketplace. The interface is colorful, has more flair, and some cool features like ‚Mixview‘ that let you quickly see related albums, songs, or other users related to what you’re listening to. Clicking on one of those will center on that item, and another set of „neighbors“ will come into view, allowing you to navigate around exploring by similar artists, songs, or users. Speaking of users, the Zune „Social“ is also great fun, letting you find others with shared tastes and becoming friends with them. You then can listen to a playlist created based on an amalgamation of what all your friends are listening to, which is also enjoyable. Those concerned with privacy will be relieved to know you can prevent the public from seeing your personal listening habits if you so choose.
I’ll gear this review to 2 types of people: current Zune owners who are considering an upgrade, and people trying to decide between a Zune and an iPod. (There are other players worth considering out there, like the Sony Walkman X, but I hope this gives you enough info to make an informed decision of the Zune vs players other than the iPod line as well.)
Apple now has Rhapsody as an app, which is a great start, but it is currently hampered by the inability to store locally on your iPod, and has a dismal 64kbps bit rate. If this changes, then it will somewhat negate this advantage for the Zune, but the 10 songs per month will still be a big plus in Zune Pass‘ favor.
This is getting a bit more subjective, but I much prefer the Zune Marketplace. The interface is colorful, has more flair, and some cool features like ‚Mixview‘ that let you quickly see related albums, songs, or other users related to what you’re listening to. Clicking on one of those will center on that item, and another set of „neighbors“ will come into view, allowing you to navigate around exploring by similar artists, songs, or users. Speaking of users, the Zune „Social“ is also great fun, letting you find others with shared tastes and becoming friends with them. You then can listen to a playlist created based on an amalgamation of what all your friends are listening to, which is also enjoyable. Those concerned with privacy will be relieved to know you can prevent the public from seeing your personal listening habits if you so choose.
If you’re still on the fence: grab your favorite earphones, head down to a Best Buy and ask to plug them into a Zune then an iPod and see which one sounds better to you, and which interface makes you smile more. Then you’ll know which is right for you.
If you’re still on the fence: grab your favorite earphones, head down to a Best Buy and ask to plug them into a Zune then an iPod and see which one sounds better to you, and which interface makes you smile more. Then you’ll know which is right for you.
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If you’re still on the fence: grab your favorite earphones, head down to a Best Buy and ask to plug them into a Zune then an iPod and see which one sounds better to you, and which interface makes you smile more. Then you’ll know which is right for you.
Apple now has Rhapsody as an app, which is a great start, but it is currently hampered by the inability to store locally on your iPod, and has a dismal 64kbps bit rate. If this changes, then it will somewhat negate this advantage for the Zune, but the 10 songs per month will still be a big plus in Zune Pass‘ favor.
Hands down, Apple’s app store wins by a mile. It’s a huge selection of all sorts of apps vs a rather sad selection of a handful for Zune. Microsoft has plans, especially in the realm of games, but I’m not sure I’d want to bet on the future if this aspect is important to you. The iPod is a much better choice in that case.
Zune and iPod: Most people compare the Zune to the Touch, but after seeing how slim and surprisingly small and light it is, I consider it to be a rather unique hybrid that combines qualities of both the Touch and the Nano. It’s very colorful and lovely OLED screen is slightly smaller than the touch screen, but the player itself feels quite a bit smaller and lighter. It weighs about 2/3 as much, and is noticeably smaller in width and height, while being just a hair thicker.
Hands down, Apple’s app store wins by a mile. It’s a huge selection of all sorts of apps vs a rather sad selection of a handful for Zune. Microsoft has plans, especially in the realm of games, but I’m not sure I’d want to bet on the future if this aspect is important to you. The iPod is a much better choice in that case.
Apple now has Rhapsody as an app, which is a great start, but it is currently hampered by the inability to store locally on your iPod, and has a dismal 64kbps bit rate. If this changes, then it will somewhat negate this advantage for the Zune, but the 10 songs per month will still be a big plus in Zune Pass‘ favor.