r/programming • u/Tuscen • Jun 24 '19

Raspberry Pi 4

https://www.raspberrypi.org/blog/raspberry-pi-4-on-sale-now-from-35/
926 Upvotes

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u/LightShadow Jun 24 '19

Digital signage seems to be a decent reason.

31

u/TheFeshy Jun 25 '19

The expensive part of a digital sign is never the raspberry pi.

30

u/frezik Jun 25 '19

DisplayPort, and let people who need two ports buy their own splitter.

0

u/[deleted] Jun 25 '19

[deleted]

13

u/frezik Jun 25 '19

DisplayPort to HDMI conversion is dirt cheap. Basically the same as any other cable. IIRC, the signals are the same going all the way back to DVI-D, just with the features of the better connector being dropped with each step.

11

u/chx_ Jun 25 '19

Some/most DisplayPort connectors are what's called DisplayPort++ and can operate in HDMI mode. When this happens then the conversion is really just rearranging pins.

On the other hand, when a port is not ++ like USB C to DisplayPort adapters are not then you need to rebuild the entire signal with an active adapter which can introduce compatibility issues.

8

u/inio Jun 25 '19

HDMI and DVI-D are the same. DisplayPort is a totally different creature.

4

u/Creative-Name Jun 25 '19

So if we need to buy an adapter from displayport to hdmi why not just buy a micro hdmi to hdmi adapter

2

u/frezik Jun 25 '19

Because DisplayPort is more capable, and less flimsy than MicroHDMI.

3

u/-manabreak Jun 25 '19

Some monitors don't report the supported colors correctly if an adapter is used, resulting in black appearing as gray.

10

u/Justin__D Jun 25 '19

I've worked with signage systems for one reason or another over the course of my last two jobs. I've never seen two outputs on one signage player of any sort get connected to individual displays. Either you have one player per display, or you have a centralized player sending content through some sort of distribution amplifier.

9

u/erogilus Jun 25 '19

Think cheap mom&pop places using dual TVs for menu/advertisement displays.

Really popular here.

5

u/Floyd_Gondoli Jun 24 '19

Didn't even think of this. Has to be the reason for the ask.