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How to get the right charger for your Raspberry Pi 4 – Review Geek



  Raspberry Pi 4 Model B.
Raspberry Pi Foundation

Two weeks ago, Raspberry Pi Foundation announced the Raspberry Pi 4. It is a future-proof computer with two Micro HDMI ports, up to 4 GB of RAM, and a bad Designed USB-C port that does not work with any USB-C cables.

Pi 4 is not USB-C compatible

USB-C is a universal format. The reason people are so hyped on USB-C is that, unlike other charging cables, it just works. However, when a device with a USB-C port is not compatible with USB-C, will always cause unexpected problems.

  Left: Pi 4 USB-C Port schematic, Right: The official USB-C Port Schematic
Left: Pi 4 USB-C Port Schematic. Right: The official USB-C port Schematic (Click for large image).

And as you probably guessed now, the Raspberry Pi Foundation did not follow the official USB-C guidelines. As reported by Tyler Ward (Scorpia), the Pi 4s circuit board uses a single 5.1 K ohm resistor for two separate CC pins. This violates the official USB-C guidelines, which require each CC pin to have its own resistance.

On the layman's terms, Pi 4 is not USB-C compatible. And at the moment, non-compatibility has caused only one problem: incompatibility with some USB-C chargers / cables.

Pi 4 does not work with e-labeled cables

E-labeled cables are "smart" "USB-C cables are usually packed with expensive devices, such as the MacBook Pro. They are able to detect the device they are Connected, goes into USB-C alt mode and regulating power.

E-labeled cables should work with all USB-C devices, not just laptops and phones, but due to Pi 4's non-compatible design , recognizes e-labeled cables Pi 4 as audio accessories and refuses to charge a charge.

How do you know if a cable is e-labeled? Well, you need to check the packaging if you still have it. USB-C cables are not labeled as "e-tagged" or "not e-tagged." Of course, you can only use Pi 4 as the e-market sector or buy a cable guaranteed to work with Pi 4.

Use "Simple" cables as the official Pi 4 cable

  An image of the official Raspberry Pi USB-C cable
PiShop

Raspberry Pi Foundation claims to fix its USB-C probe the limb in the next revision. But if you have already ordered a Pi 4, congratulations! You cannot use e-tagged cables with the device. So, what now?

Technically you can use some "simple" USB-C cable with Pi 4. It gives you many options, but we recommend that you stick to the official Pi 4 cable. The Raspberry Pi Foundation apparently did not test a number of cables with the charging station (otherwise it would have been aware of this problem), so there is a chance that even some "simple" USB-C cables will have trouble working with Pi 4.

If you don't want to pay $ 8 for the official Pi 4 cable (it's so big, you understand), you can take the chance with a "single" USB-C cable and a fast charge or native USB-C power brick. Pi 4 needs 15.3 watts of power, and most cheap or outdated power stones cannot push that type of watts. There is still a chance that this will not work, of course, so that mileage may vary.

Sources: Scorpia, Benson Leung


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