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Forum Index : Microcontroller and PC projects : CMM2 - VGA-to-HDMI converter for US$2.50.....

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Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9307
Posted: 05:23am 18 Dec 2023
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I ordered one of these things to test with the CMM2, and am delighted - and more then a little surprised(for the price!) - to find it works just fine.  Image is stable and crisp.  I used the mouse port on the CMM2 to power the converter, but if you also needed the mouse port, a simple external USB 5v power pack/wall-wart would also work.

Even when it is NOT on special, it is only US$3.55!  
For that price, I was sure it would not work well, or perhaps not even work AT ALL, but I have been pleasantly surprised.  

From next year, I think I will be including this adaptor as part of the CMM2 product, then we have HDMI covered.  

Can anyone suggest any changes I could make to the resolutions etc, to try to trip this unit up?
Now that I know it works, I would like to see how it deals with any changes, especially if there are any NON-STANDARD resolutions I can put the CMM2 into, to see what happens with the converter.
Smoke makes things work. When the smoke gets out, it stops!
 
Turbo46

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Joined: 24/12/2017
Location: Australia
Posts: 1611
Posted: 05:28am 18 Dec 2023
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On TassyJim's MMEdit site he has a MMBasic video Mode test card program. That should test it out.

Bill
Keep safe. Live long and prosper.
 
palcal

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Joined: 12/10/2011
Location: Australia
Posts: 1873
Posted: 05:29am 18 Dec 2023
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This looks like the same thing Here
$A0.69
Edited 2023-12-18 15:30 by palcal
"It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all"
 
phil99

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Joined: 11/02/2018
Location: Australia
Posts: 2135
Posted: 05:39am 18 Dec 2023
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There are a lot of things advertised on AE for $0.69 but when you click "Add to Cart" the price jumps. Just a clickbait price.
That one jumps to $4.42 + postage.

Edit
Correction.
Go to the checkout and it changes to $4.88 including postage. Not so bad after all.
Edited 2023-12-18 15:53 by phil99
 
Grogster

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Posted: 05:54am 18 Dec 2023
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  Turbo46 said  On TassyJim's MMEdit site he has a MMBasic video Mode test card program. That should test it out.

Bill


Excellent, thanks Bill.  
Smoke makes things work. When the smoke gets out, it stops!
 
TassyJim

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Joined: 07/08/2011
Location: Australia
Posts: 6098
Posted: 06:28am 18 Dec 2023
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Grogster,
Try it on as many different TV/monitors as you can find. It might be fussy and if you supply it, you will get the flack if it doesn't work satisfactorily on some obscure monitor.

Jim
VK7JH
MMedit   MMBasic Help
 
phil99

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Posts: 2135
Posted: 06:41am 18 Dec 2023
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Indeed! Peter gets flack for display issues no-one else can see.
 
Grogster

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Posted: 07:25am 18 Dec 2023
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Excellent point.

Wilco.
Smoke makes things work. When the smoke gets out, it stops!
 
PeteCotton

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Joined: 13/08/2020
Location: Canada
Posts: 368
Posted: 06:20pm 18 Dec 2023
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I've been using mine for years without issue in any resolution I've tried (although I only have a Gen 1 CMM2 - so haven't tried the Gen 2 resolutions).

My monitor is a fairly old ASUS 1920x1080. Nothing special.

The 4:3 images do get stretched (see below) - but it doesn't make a huge difference (in fact I like it).

This is mode 1 640x400. Note: The slight bluriness is caused by my hand shake - the image is rock solid.

 
JohnS
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Joined: 18/11/2011
Location: United Kingdom
Posts: 3802
Posted: 03:46pm 19 Dec 2023
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These both seem to work (haven't tried audio)

VGA to HDMI

VGA to HDMI

John
 
stanleyella

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Joined: 25/06/2022
Location: United Kingdom
Posts: 2129
Posted: 04:09pm 19 Dec 2023
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  JohnS said  These both seem to work (haven't tried audio)

VGA to HDMI

VGA to HDMI

John

thanks for the links
 
PeteCotton

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Location: Canada
Posts: 368
Posted: 06:14pm 30 Dec 2023
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As a quick update - I just bought one of these for another project (recording and passing through the HDMI) and it also works great for recording the HDMI output from the CMM2 (via those cheap VGA-HDMI adapters).

https://www.amazon.ca/dp/B0CLNZ8267?psc=1&ref=ppx_yo2ov_dt_b_product_details

As a wee bonus, it can also be used as a picture-in-picture input for a larger monitor (it appears as a "camera" on a PC, so you can open the camera app and position it wherever you want on your screen).

This is particularly useful as I'm working on a CMM2 program that requires communicating with an ESP32, and being able to program both of them side by side is way more comfortable than having to swivel between two monitors. In the picture below, you can see the CMM2 display at the the top left.



Edited 2023-12-31 04:15 by PeteCotton
 
bigmik

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Joined: 20/06/2011
Location: Australia
Posts: 2914
Posted: 12:10am 31 Dec 2023
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Hi All,

The one I have, and used for testing CMM2 back in the days has worked well for me and my HDMI only input monitors. Also less than $3AU.




Be wary though there are similar (identical looking) units that convert HDMI to VGA not the other way around. Read the labelling of input and output carefully


Regards,

Mick




.
Edited 2023-12-31 10:12 by bigmik
Mick's uMite Stuff can be found >>> HERE (Kindly hosted by Dontronics) <<<
 
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