Mini HDMI Display Port adaptors

The R Pi has a (mini) HDMI output ( actually 2 of them).

Display Port adapters typically have a DP input and an HDMI output - to allow, for example, a laptop with a DP output to use an HDMI display.

The adapters don’t work ‘in reverse’, at least in general.

DisplayPort is a packetised protocol and is similar to Ethernet. However most forms of DP sources will detect an HDMI sink where the signals are mapped from DP connector pins to HDMI connector pins.

In this case the DP source outputs HDMI signals and not DP signals.

A DP monitor requires a DP source, and the only way of driving a DP monitor with HDMI signals is with an active adaptor that produces the clocks and TMDS data.

The safest solution is to get a monitor with an HDMI input.

Nice explanation :)

Or DVI - which is a simple passive adaptor to HDMI (both ways)

I see many ex-office monitors in Charity shops featuring all sorts of connectors. They are often less than a fiver.

Thanks.

DVI and HDMI are pretty much interchangeable though worth remembering that a compliant DVI doesn't carry audio. But some aren't and do actually carry audio.

DVI does not carry audio though, which may or may not be a problem.

I'm just trying to avoid having even more large items of equipment around.

It is an exceptionally good one, which was why I was trying to make use of it...

The monitor, by default, is used with my desktop. What I have done, is install RealVNC on the desktop, which now enables me to take control of the Rpi, and it's display, on the desktop.

yup, and moreover there are also HDCP issues if attempting to display TV style video from HDMI, which also the monitor may or may not support - though probably not an issue with the OP's Raspberry Pi usage.

Usually the prices here are too high. I use the site for an "existence" check, to see if an item is made.

"Active HDMI to DisplayPort 1.2"

This looks like a cheap one. Helpfully, they labeled "source" and "display" so you know which direction of conversion it supports.

Active HDMI to DisplayPort Adapter (4K@60Hz), Uni-Directional HDMI Source to Display Port Converter Cable HDMI Male to DP Female

The USB +5V supply is "optional". It can be thrown in as a cable, when the chipset manufacturer refuses to bound power consumption, and the USB cable is the "auxiliary supply" in case it does not work. By using the USB cable, it should stop drawing +5V from the HDMI source device, and instead draw it from whatever provides the USB power.

Generally speaking, the higher the resolution requested, the warmer it is going to get. Run at 1920x1080 @ 60FPS, it's possible you could leave the USB cable dangling. The display resolution and refresh determines the datarate on the cable.

The EDID from the monitor, should flow back to the source device, and the source device defines the resolution and refresh. I use several adapters here for monitors, but the type you are getting, I have zero stock of those. If for any reason, the EDID signal did not go back from the monitor to the source device, the source device will select 1024x768. If circles look like ellipses or such, then it's an EDID issue. An EDID dumper program can be used to see what resolutions the monitor supports (the "native" res giving the best picture).

Paul

I've got three LCD monitors sitting on the floor here because they are too good to skip.

One flickers a bit. None are HDMI - only VGA

They may end up trashed if I spring clean...

You can get a NEW 22" full HD monitor for less than £70.

Less than £60 from Argos.

That is a very sane solution.

I have loads of pi's and no screens on ANY of them. And no GUIS either...

The DVI standard doesn't but most DVI ports are driven by HDMI compatible ICs, such they inadvertently do carry video. However it's not a certainty.

I use a USB HDMI (input) adapter and the default camera "app" on the desktop PC when I need to see what a Pi is saying without setting another telly up. A small USB keyboard connected to the Pi if necessary. Usually only for initial setup, or if I've B*lloxed it up somehow.

Ive got a huge HDMI screen for another project that gets used as a monitor for the pi if i have as you say B*lloxed it up somehow.

Otherwise remote access keeps the box count down.

I tried to get pis up without an HDMI screen and mostly it works, but when it doesnt there is no better alternative really.