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adaptor for older monitor

Posted: Tue Dec 12, 2017 7:02 pm
by pinoob1
Greetings, I am trying to hook up a RaspPi 3 (essentials kit) to an older monitor. I'm confused about what adaptor to buy. The monitor only takes VGA. It is a NEC Multisync LCD1760V. 100-240V, 50/60Hz, 0.7-0.36A. Model L173FB.

Is the next move to buy an HDMI to VGA adaptor? I just don't want to buy the wrong thing. (Also: do I have to give the Pi special instructions to make this work...?) Thank you!

Re: adaptor for older monitor

Posted: Tue Dec 12, 2017 9:28 pm
by W. H. Heydt
You need an HDMI to VGA converter. It's takes active elements to convert the difital HDMI signals into the analog VGA signals. The best converters have their own power connection. If you hunt around, it may be cheaper to find a monitor with DVI or HDMI inpput than to get a decent HDMI to VGA converter.

Re: adaptor for older monitor

Posted: Tue Dec 12, 2017 10:18 pm
by pinoob1
Thanks! So something like this would be okay then? https://www.amazon.com/Cable-Matters-Ac ... B008O7RH5C

I'm having trouble finding anything with separate power source. They all seem pretty much the same. Will it harm the Pi if I use one of these...? I looked through the site but can't find specific info about a make/model that RaspPi itself recommends. Thanks for any clarification.

Re: adaptor for older monitor

Posted: Tue Dec 12, 2017 10:39 pm
by fruitoftheloom
pinoob1 wrote:
Tue Dec 12, 2017 10:18 pm
Thanks! So something like this would be okay then? https://www.amazon.com/Cable-Matters-Ac ... B008O7RH5C

I'm having trouble finding anything with separate power source. They all seem pretty much the same. Will it harm the Pi if I use one of these...? I looked through the site but can't find specific info about a make/model that RaspPi itself recommends. Thanks for any clarification.

This one not only will take a USB Power Source (it may not need if you are using a good quality PSU to power the RPi) but also has Audio Out, and cheaper:

https://www.amazon.com/Rankie-Gold-Plat ... 00ZMV7RL2/

Re: adaptor for older monitor

Posted: Wed Dec 13, 2017 4:36 am
by pinoob1
Thanks... I posted a reply earlier but must have messed up so will try again: the stuff about a "powered" adaptor is confusing to me. The adaptor would plug into... a USB hub, then? Because if I can't run a "passive" adaptor for fear of frying the board (meaning: I can't plug the adaptor back into the Pi's USB port)... then actually two additional parts are needed - is that correct?? A USB hub that plugs into the mains *and* the adaptor. Thanks again, much appreciate your help.

Re: adaptor for older monitor

Posted: Wed Dec 13, 2017 6:23 am
by rpdom
You can plug a powered convertor into one of the Pi's USB ports for power, no problem.

Convertors that don't use external power get their power from the HDMI port, which is only supposed to supply a small current. Sometime this is not enough.

Re: adaptor for older monitor

Posted: Wed Dec 13, 2017 11:46 am
by k-pi
This is what I have used, note it also has audio output for a 3.5mm plug to your speakers.
(My RPi3B uses the standard 2.5amp power supply, no other was needed.)

https://thepihut.com/products/raspberry ... -convertor

Re: adaptor for older monitor

Posted: Fri Dec 15, 2017 4:08 pm
by retrkdr
https://www.amazon.com/gp/product/B00OF ... UTF8&psc=1

This is what I got to connect to my HP Vga monitor. Worked like a charm.

Re: adaptor for older monitor

Posted: Sat Dec 16, 2017 7:14 am
by broe23
Tripplite did have a raffle for their HDMI to RGB with sound adapter. I keep a HDMI to DVI pigtail around for a monitor that I have for bench testing. The Tripplite unit is a bit bulkier and made to be plugged into the monitor. I have not gotten the one I won yet, to see if it will work with HDMI output to RGB input on a flastscreen I use with our Windows desktop.