ortholop.blogg.se - Raspberry pi 4 model b connectors

More Options: There are now thirty two different Compute Module flavors to choose from, whether you want onboard WiFi or not, whether you want eMMC storage, or whether you want 1, 2, 4, or even eight gigabytes of RAM!.

What's that? Oh yes, there's now a version of the Compute Module with Bluetooth and WiFi!

WiFi and U.FL: It has an external antenna connector for its wireless interface.

PCI Express: It drops the USB 3.0 interface for a PCI Express interface, meaning you can do some pretty cool things in lieu of having a couple USB 3.0 ports.Faster eMMC: It has optional onboard eMMC storage, which is now much faster than any microSD card I've tested.But the Compute module has a few other tricks up its sleeve: Instead of the ports, you plug the Compute Module into another board with its special board-to-board connectors. The Compute Module 4 is basically a Raspberry Pi 4 model B, with all the ports cut off. My Chromebook's 65W PSU can do 5V/3A so it should be able to run a Pi4.Īnother potential issue is that some "smart" power supplies may only output 500mA (5V/0.5A) to devices that don't negotiate power, regardless of what they may be capable of (seeing 5V/3A on a USB-C PD power supply does not mean it will deliver that to devices that don't ask for it).Update: I also did a Live Q&A and Demo Video which has another hour of content going deeper into things I couldn't cover in the review! Compute Module 4 Overview

Since a Pi4 only operates at 5V, and 3A is the recommended current capability for a Pi4 PSU, it would not get enough wattage from her Chromebook's power supply (10W vs the recommended 15W). For example, the PSU that came with my GF's Chromebook is capable of 45W PD charging, but will only output a max of 2A at 5V and needs more voltage to deliver the higher wattage. So when connected to a PD power supply, they may not get enough power. USB-C uses a protocol called Power Delivery (PD) to negotiate the power needs of devices, and to offer higher voltage to those that need more wattage (like 100W laptop charging, which is done at 20V and 5A).įirst of all, Pi computers don't support PD or any kind of power negotiation. In theory, yes, but in practice there are potential problems. Can we use an alternate power supply, e.g.