The New Raspberry Pi 4 - Page 1
Forum section: electronics / general

author: voltlog
author_rank: Regular Contributor
timestamp: April 01, 2017, 09:31:13 am
content: I recently got my hands on the new (not released yet) Raspberry Pi 4. It was an engineering sample, I couldn't keep it for long but I did a short video which is linked below. What do you think of it?

author: wraper
author_rank: Unknown
timestamp: April 01, 2017, 09:42:11 am
content: , nice

author: brucehoult
author_rank: Super Contributor
timestamp: April 01, 2017, 12:15:18 pm
content: Very impressive work.Interesting they decided to go with a 240 MHz MIPS based WIFI chip from ten years ago as the main CPU.But very nicely made!

author: amitchell
author_rank: Regular Contributor
timestamp: April 01, 2017, 12:34:37 pm
content: What IC's are being used for the Type-C over current protection?

author: moxzero
author_rank: Newbie
timestamp: April 01, 2017, 12:58:00 pm
content: Was this demo supplied by "April Fools Day!"Sent from my iPhone using Tapatalk

author: PA0PBZ
author_rank: Super Contributor
timestamp: April 01, 2017, 01:17:55 pm
content: Very nice! Looking forward to the follow up as you mentioned in the comments on YT.

author: voltlog
author_rank: Regular Contributor
timestamp: April 01, 2017, 05:27:05 pm
content: thank you guys, follow up video will be coming soon

author: Ampera
author_rank: Super Contributor
timestamp: April 01, 2017, 08:11:56 pm
content: Looks neat. I like the USB-C, and while some people might hate it, the standard is changing industry wide, and while USB-A/B has been with us for a while. I do hope to see more of USB-C.

author: voltlog
author_rank: Regular Contributor
timestamp: April 02, 2017, 06:10:17 am
content: Quote from: TwoOfFive on April 01, 2017, 08:11:56 pmI wouldn't mind usb type C if it really came with the advantages I mentioned in the video..

author: Red Squirrel
author_rank: Super Contributor
timestamp: April 02, 2017, 06:39:20 am
content: Actually (I know this is a joke but curious now) to use USB-C do you have to pay a royalty to Apple, or is it an open standard? I definitely like the idea that you can put it any side you want and would welcome the change if it's open and not proprietary. That should have been part of the standard from the beginning. Same with HDMI etc it should be designed so any way fits, or at very least easy to identify. HDMI is a big easier because of th indent mind you. These are types of connectors that are often behind a piece of equipment or in awkward places, or simply that need to be connected/disconnected often (like a phone charger) so it makes sense.

author: voltlog
author_rank: Regular Contributor
timestamp: April 02, 2017, 06:45:22 am
content: Quote from: Red Squirrel on April 02, 2017, 06:39:20 amUSB Type-C is developed and maintained as a standard by USB Implementers Forum (USB-IF), Apple just uses this standard on their products, other manufacturers as well.In fact, I think I could of ditched the HDMI port as well, and replace it with another usb type-c port, because I believe you can also transmit HDMI over usb type-C.

author: Red Squirrel
author_rank: Super Contributor
timestamp: April 02, 2017, 06:58:05 am
content: Quote from: voltlog on April 02, 2017, 06:45:22 amThat is good to know. Hopfully it catches on then.

author: amitchell
author_rank: Regular Contributor
timestamp: April 02, 2017, 03:56:59 pm
content: USB Type-C with PD is awesome. It replaces HDMI, Displayport and Thunderbolt.,while also being able to provide up to 100W of power and USB data transfer at the same time. The Pi 4 does not look to be able to do PD though, should be seeing VBUS control FET pairs at the ports.

author: cowana
author_rank: Frequent Contributor
timestamp: April 02, 2017, 05:22:27 pm
content: Quote from: amitchell on April 01, 2017, 12:34:37 pmLooks like Microchip 4k I2C EEPROMs from the hi-res photos!

author: amitchell
author_rank: Regular Contributor
timestamp: April 02, 2017, 05:48:37 pm
content: LOL, well after looking for the FCC code... nice work! I like the PROM port protection, must be a new standard.

author: wraper
author_rank: Unknown
timestamp: April 02, 2017, 05:50:07 pm
content: Quote from: cowana on April 02, 2017, 05:22:27 pmNot only that. Ceramic capacitors connected in series. 2.5 differential pairs going through each of 6 pin "ESD protection" ICs on HDMI output. BS differential pairs.

author: voltlog
author_rank: Regular Contributor
timestamp: April 02, 2017, 06:20:08 pm
content: I didn't expect people taking such a close look at the layout but hey I'm glad to see how you guys investigating this

author: amitchell
author_rank: Regular Contributor
timestamp: April 02, 2017, 07:47:01 pm
content: Quote from: voltlog on April 02, 2017, 06:20:08 pmSo does it do anything other than release smoke when you plug it in?

author: voltlog
author_rank: Regular Contributor
timestamp: April 02, 2017, 08:22:33 pm
content: Quote from: amitchell on April 02, 2017, 07:47:01 pmTake a look at min 7:30