loran
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Pi Zero W on old TV

Thu Aug 10, 2017 12:02 am

Hello,
I have a raspberry pi zero w and currently i manage it using ssh and remote desktop. I would like to plug it in my tv but it is old (the ones with RCA) . I am wondering if i buy

Code: Select all

http://www.ebay.com/itm/201925842029
and

Code: Select all

https://www.aliexpress.com/item/Details-about-HDMI-Male-to-3-RCA-AV-Audio-Video-5FT-Cable-Cord-Adapter-for/32784995359.html
if it will work.

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karrika
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Re: Pi Zero W on old TV

Thu Aug 10, 2017 2:07 am

Have you looked at the analog tv out pins on PiZero? Soldering a cable directly from these pins to video in might be the easiest way.

Image

klricks
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Re: Pi Zero W on old TV

Thu Aug 10, 2017 4:48 am

loran wrote:
Thu Aug 10, 2017 12:02 am
Hello,
I have a raspberry pi zero w and currently i manage it using ssh and remote desktop. I would like to plug it in my tv but it is old (the ones with RCA) . I am wondering if i buy

Code: Select all

http://www.ebay.com/itm/201925842029
and

Code: Select all

https://www.aliexpress.com/item/Details-about-HDMI-Male-to-3-RCA-AV-Audio-Video-5FT-Cable-Cord-Adapter-for/32784995359.html
if it will work.
Do not use code tags on your links.... Just copy directly like this:
http://www.ebay.com/itm/201925842029
https://www.aliexpress.com/item/Details ... 95359.html

The cable in your second link is a passive type which will not work with the RPi. It must be an active converter which are usually in a box with a power source.
As mentioned the RPi already has composite out so no need for a converter.
Go here for my RPi writeup. Basic config, Serial Port add-on etc:
http://blackeagle12.net/Comp/RPi/Rpi.html Click contact icon then world icon --->

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Crashedfiesta2
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Re: Pi Zero W on old TV

Thu Aug 10, 2017 11:43 am

Have a look at this ModMyPi article:

https://www.modmypi.com/blog/how-to-add ... ry-pi-zero

I'm planning on doing this to my Pi Zero too. :)

loran
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Joined: Wed Aug 09, 2017 11:49 pm

Re: Pi Zero W on old TV

Thu Aug 10, 2017 2:58 pm

Crashedfiesta2 wrote:
Thu Aug 10, 2017 11:43 am
Have a look at this ModMyPi article:

https://www.modmypi.com/blog/how-to-add ... ry-pi-zero

I'm planning on doing this to my Pi Zero too. :)
So it can't be done through my way :( ? As I see there are no cables included in the package, how can I search for them? One more thing, I'm running dietpi and not raspbian. Should I follow the tutorial as is or there are other things to do? After doing the process should it have audio or just video?

loran
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Joined: Wed Aug 09, 2017 11:49 pm

Re: Pi Zero W on old TV

Thu Aug 10, 2017 3:31 pm

klricks wrote:
Thu Aug 10, 2017 4:48 am
loran wrote:
Thu Aug 10, 2017 12:02 am
Hello,
I have a raspberry pi zero w and currently i manage it using ssh and remote desktop. I would like to plug it in my tv but it is old (the ones with RCA) . I am wondering if i buy

Code: Select all

http://www.ebay.com/itm/201925842029
and

Code: Select all

https://www.aliexpress.com/item/Details-about-HDMI-Male-to-3-RCA-AV-Audio-Video-5FT-Cable-Cord-Adapter-for/32784995359.html
if it will work.
Do not use code tags on your links.... Just copy directly like this:
http://www.ebay.com/itm/201925842029
https://www.aliexpress.com/item/Details ... 95359.html

The cable in your second link is a passive type which will not work with the RPi. It must be an active converter which are usually in a box with a power source.
As mentioned the RPi already has composite out so no need for a converter.
So there is not any way like the one I thought to make it work?

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fruitoftheloom
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Re: Pi Zero W on old TV

Thu Aug 10, 2017 3:36 pm

loran wrote:
Thu Aug 10, 2017 3:31 pm
So there is not any way like the one I thought to make it work?
Maybe this would suffice and similar are sold elsewhere:

http://www.ebay.co.uk/itm/1080P-HDMI-to ... 2626896459
My only "PC" is an Asus ChromeBit running ChromeOS, cloudcentric at its best !
Rockchip Quad-Core RK3288C ARM32 SoC as used in ASUS Chromebook C201 & Chromebook Flip C100PA as well as the Tinker SBC.
3 Mobile Huawei E5330 Mobile Mi-Fi

loran
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Re: Pi Zero W on old TV

Thu Aug 10, 2017 6:09 pm

fruitoftheloom wrote:
Thu Aug 10, 2017 3:36 pm
loran wrote:
Thu Aug 10, 2017 3:31 pm
So there is not any way like the one I thought to make it work?
Maybe this would suffice and similar are sold elsewhere:

http://www.ebay.co.uk/itm/1080P-HDMI-to ... 2626896459
This will need two other cables and the first kit that i mentioned in 1st post, right? One hdmi cable to connect the rpi with the converter and one to connect the converter with TV. Which ones should I choose?

Doing this, should I have audio? viewtopic.php?p=1197033#p1197033
Seems pretty easy and cheaper. Which method should I choose?

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fruitoftheloom
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Location: Bognor Regis UK

Re: Pi Zero W on old TV

Thu Aug 10, 2017 7:02 pm

loran wrote:
Thu Aug 10, 2017 6:09 pm
fruitoftheloom wrote:
Thu Aug 10, 2017 3:36 pm
loran wrote:
Thu Aug 10, 2017 3:31 pm
So there is not any way like the one I thought to make it work?
Maybe this would suffice and similar are sold elsewhere:

http://www.ebay.co.uk/itm/1080P-HDMI-to ... 2626896459
This will need two other cables and the first kit that i mentioned in 1st post, right? One hdmi cable to connect the rpi with the converter and one to connect the converter with TV. Which ones should I choose?

Doing this, should I have audio? viewtopic.php?p=1197033#p1197033
Seems pretty easy and cheaper. Which method should I choose?
HDMi outputs video & audio....

A converter box, which is powered from USB, inputs the HDMi via a standard HDMi cable and outputs as standard Composite and Left/Right Audio, therefore you need a standard 3 phono to 3 phono AV Cable:

http://www.ebay.co.uk/itm/1080P-Mini-HD ... 2738430868

http://www.ebay.co.uk/itm/Triple-3-x-Ph ... 1346297722

The Yellow is Composite whilst the Red and White are Audio
My only "PC" is an Asus ChromeBit running ChromeOS, cloudcentric at its best !
Rockchip Quad-Core RK3288C ARM32 SoC as used in ASUS Chromebook C201 & Chromebook Flip C100PA as well as the Tinker SBC.
3 Mobile Huawei E5330 Mobile Mi-Fi

loran
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Re: Pi Zero W on old TV

Sat Aug 12, 2017 9:42 am

fruitoftheloom wrote:
Thu Aug 10, 2017 7:02 pm
loran wrote:
Thu Aug 10, 2017 6:09 pm
fruitoftheloom wrote:
Thu Aug 10, 2017 3:36 pm


Maybe this would suffice and similar are sold elsewhere:

http://www.ebay.co.uk/itm/1080P-HDMI-to ... 2626896459
This will need two other cables and the first kit that i mentioned in 1st post, right? One hdmi cable to connect the rpi with the converter and one to connect the converter with TV. Which ones should I choose?

Doing this, should I have audio? viewtopic.php?p=1197033#p1197033
Seems pretty easy and cheaper. Which method should I choose?
HDMi outputs video & audio....

A converter box, which is powered from USB, inputs the HDMi via a standard HDMi cable and outputs as standard Composite and Left/Right Audio, therefore you need a standard 3 phono to 3 phono AV Cable:

http://www.ebay.co.uk/itm/1080P-Mini-HD ... 2738430868

http://www.ebay.co.uk/itm/Triple-3-x-Ph ... 1346297722

The Yellow is Composite whilst the Red and White are Audio
Thank you for helping me :)
I meant this way https://www.modmypi.com/blog/how-to-add ... ry-pi-zero because it looks more cheap to build. I noticed that I dont have composite video port on my tv, so I have to purchase also a rca to scart adapter or something(?). My only concern is that I think it will not have audio, so If I want to play a movie or something it will be useless.
Till now the price is less than 3€.
http://www.ebay.com/itm/222608148302
http://www.ebay.com/itm/172755578529?var=471540167281
http://www.ebay.com/itm/222308307080?var=521148696784

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fruitoftheloom
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Location: Bognor Regis UK

Re: Pi Zero W on old TV

Sat Aug 12, 2017 10:04 am

loran wrote:
Sat Aug 12, 2017 9:42 am
My only concern is that I think it will not have audio, so If I want to play a movie or something it will be useless.
You will need to build a sound output circuit:

https://learn.adafruit.com/introducing- ... io-outputs

Yes you will need an Adaptor for Scart Input, something like:

http://www.ebay.co.uk/itm/SCART-To-3-RC ... 2659785540
My only "PC" is an Asus ChromeBit running ChromeOS, cloudcentric at its best !
Rockchip Quad-Core RK3288C ARM32 SoC as used in ASUS Chromebook C201 & Chromebook Flip C100PA as well as the Tinker SBC.
3 Mobile Huawei E5330 Mobile Mi-Fi

loran
Posts: 9
Joined: Wed Aug 09, 2017 11:49 pm

Re: Pi Zero W on old TV

Sat Aug 12, 2017 3:17 pm

fruitoftheloom wrote:
Sat Aug 12, 2017 10:04 am
loran wrote:
Sat Aug 12, 2017 9:42 am
My only concern is that I think it will not have audio, so If I want to play a movie or something it will be useless.
You will need to build a sound output circuit:

https://learn.adafruit.com/introducing- ... io-outputs

Yes you will need an Adaptor for Scart Input, something like:

http://www.ebay.co.uk/itm/SCART-To-3-RC ... 2659785540
I am planning to follow the first tutorial for the video.
It will cost around 5-6€ to make it work (the items mentioned above + the scart adapter + the cables and adapters mentioned below).
I'm thinking to add a 3.5mm jack to rca cable for audio (about 1$) plus one usb sound adapter (1$) to connect it using my otg y cable that i have. Not only it will be cheaper than my first plan but I will have some things for other projects or something. Has anyone tried something like this? Does it work out of the box or should I configure my raspberry? If yes, is there amy tutorial?

https://www.ebay.co.uk/p/external-virtu ... &rdtsrc=vi

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ab1jx
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Re: Pi Zero W on old TV

Sun Aug 13, 2017 5:19 pm

loran wrote:
Thu Aug 10, 2017 3:31 pm
So there is not any way like the one I thought to make it work?
The horizontal and vertical refresh rates in typical analog televisions are much slower than in computer monitors, you'd burn it up. In the 1940s or so when the standards were established there was no need to go fast, it was a miracle to have it work at all. "In analog television systems the horizontal frequency is between 15.625 kHz and 15.750 kHz." from https://en.wikipedia.org/wiki/Horizontal_scan_rate

You can simulate a composite input (RCA jacks) by using an RF modulator. Used with video games to produce a TV signal, fairly often there's a sound input. Typically switchable between channels 3 and 4. There are one or 2 ICs that do that single handedly, you can find those in an old VCR. LM 1889 or 2889, maybe some others. A lot of work to use though if you start from scratch. I'm in the US and I used to be a TV technician, so I'm talking NTSC, I assume something similar is available for PAL. Pretty much any of these, don't pay much because millions of them have been thrown out: https://www.google.com/search?output=se ... 3472226903

You could also pick up an old VGA monitor cheap or free and use an HDMI->VGA adapter. I have my Zero hooked up that way to an old CRT VGA monitor. My adapter was cheap and it's either passive or self-powered from somewhere, there's no power connection. Monitor was free, adapter was maybe $10.
Last edited by ab1jx on Sun Aug 13, 2017 6:58 pm, edited 3 times in total.

bensimmo
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Location: East Yorkshire

Re: Pi Zero W on old TV

Sun Aug 13, 2017 5:57 pm

What screen is it, with a make and model people may/may not be able to find out what connections you have and advise on the cheapest method.

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davidcoton
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Re: Pi Zero W on old TV

Sun Aug 13, 2017 8:57 pm

ab1jx wrote:
Sun Aug 13, 2017 5:19 pm
The horizontal and vertical refresh rates in typical analog televisions are much slower than in computer monitors, you'd burn it up. In the 1940s or so when the standards were established there was no need to go fast, it was a miracle to have it work at all. "In analog television systems the horizontal frequency is between 15.625 kHz and 15.750 kHz." from https://en.wikipedia.org/wiki/Horizontal_scan_rate
As long as you select the correct video standard on the Pi, this is not an issue. Analogue inputs designed for old TV standards certainly won't like high definition video.
ab1jx wrote: You can simulate a composite input (RCA jacks) by using an RF modulator. Used with video games to produce a TV signal, fairly often there's a sound input. Typically switchable between channels 3 and 4. There are one or 2 ICs that do that single handedly, you can find those in an old VCR. LM 1889 or 2889, maybe some others. A lot of work to use though if you start from scratch. I'm in the US and I used to be a TV technician, so I'm talking NTSC, I assume something similar is available for PAL. Pretty much any of these, don't pay much because millions of them have been thrown out: https://www.google.com/search?output=se ... 3472226903
The quality of signal from an UHF modulator into the aerial socket will be unusable in most cases, NTSC or PAL.
ab1jx wrote: You could also pick up an old VGA monitor cheap or free and use an HDMI->VGA adapter. I have my Zero hooked up that way to an old CRT VGA monitor. My adapter was cheap and it's either passive or self-powered from somewhere, there's no power connection. Monitor was free, adapter was maybe $10.
That was where the thread started. Passive converters don't always work. (AIUI, many rely on signals defined for HDMI but not implemented on the Pi.) It may be possible to find an active converter powwered over the HDMI link.

My take on it all so far: there are two options, an active HDMI to composite converter, or solder on to the Pi's composite output and build a separate sound output stage. Either way you need a cable to provide the Scart connection. Either way you need to configure the Pi for the right signal out, though this may be less critical with a converter. No-one can guarantee that either solution will work for you, unless they just happen to have the same TV and can recommend parts that you can still find.
"If it ain't broke, fix it until it is."
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The Pink Unicorn is a symbol of commitment to sensible discussion of future versions of the Raspberry Pi ™

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ab1jx
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Re: Pi Zero W on old TV

Fri Aug 18, 2017 11:12 pm

Just throwing this out there because I just found it in looking for OLED displays. Don't know anything about it but HDMI and touch screen and 1280x800 and 10 inch for $135 doesn't sound bad. https://www.aliexpress.com/item/Elecrow ... sstype=600 I have an Axess 13 inch TV with HDMI in which works with my Pi but it's not easy to read small rxvt windows. It was only like $140 and has a DVD player built into it. Composite and VGA inputs too.

Whatever you do to use an old TV the quality of picture isn't going to be very good. If it had a composite input it would be better than going through an RF modulator. I had a 12" TV that I used to use with a Commodore 64, I think in 40 characters per line mode though. I spent a lot of hours in front of an Apple II and a 40 column composite monitor. I had a surplus composite monitor that I used, I think in 80 column mode, with an IBM-PC CG card, but Hercules was much better. That was all like 30 years ago, before there was HDMI I think.

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