bullen
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Normal cable?

Sun Aug 02, 2020 9:58 pm

Any plans on making a cable that is round for the camera?
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msl
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Re: Normal cable?

Sun Aug 02, 2020 11:35 pm

Do you mean you want RCA connector for analog video input or what?

bullen
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Re: Normal cable?

Sun Aug 02, 2020 11:44 pm

Nope, I mean a round cable for the camera.

Like this but not using HDMI:

https://www.geeky-gadgets.com/raspberry ... 8-05-2015/
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msl
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Re: Normal cable?

Mon Aug 03, 2020 12:07 am

bullen wrote:
Sun Aug 02, 2020 11:44 pm
Nope, I mean a round cable for the camera.

Like this but not using HDMI:

https://www.geeky-gadgets.com/raspberry ... 8-05-2015/
There is a dedicated boiler in hell for those who makes i2c and MIPI DSI/CSI2 wires/traces longer than 50cm.
My guess is that Pi engineers have much more amazing stuff to do, leaving production of such cables to creative DIYers.

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Imperf3kt
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Re: Normal cable?

Mon Aug 03, 2020 5:12 am

The cable flexes, just zip tie or sticky tape it into a tube shape.

You can't do anything about the ends being rectangular.
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jamesh
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Re: Normal cable?

Mon Aug 03, 2020 6:33 am

bullen wrote:
Sun Aug 02, 2020 9:58 pm
Any plans on making a cable that is round for the camera?
No plans from us I am afraid.
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rpdom
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Re: Normal cable?

Mon Aug 03, 2020 6:43 am

msl wrote:
Mon Aug 03, 2020 12:07 am
There is a dedicated boiler in hell for those who makes i2c and MIPI DSI/CSI2 wires/traces longer than 50cm.
Such as the i2c wires in an HDMI cable?
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HermannSW
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Re: Normal cable?

Mon Aug 03, 2020 7:00 am

msl wrote:
Mon Aug 03, 2020 12:07 am
There is a dedicated boiler in hell for those who makes i2c and MIPI DSI/CSI2 wires/traces longer than 50cm.
While only 15cm long cables are officially supported, I use 1m and 2m CSI-2 flex cables routinely without issues for years.
(as long as they do not come close to mains or high voltage/current DC cables)
https://stamm-wilbrandt.de/en/Raspberry_camera.html
https://stamm-wilbrandt.de/en#raspcatbot
https://github.com/Hermann-SW/raspiraw
https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://stamm-wilbrandt.de/github_repo_i420toh264

msl
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Re: Normal cable?

Mon Aug 03, 2020 10:04 am

rpdom wrote:
Mon Aug 03, 2020 6:43 am
Such as the i2c wires in an HDMI cable?
HermannSW wrote:
Mon Aug 03, 2020 7:00 am
While only 15cm long cables are officially supported, I use 1m and 2m CSI-2 flex cables routinely without issues for years.
(as long as they do not come close to mains or high voltage/current DC cables)
Good catch with DDC :D
And I didn’t mean to be offensive, it’s more like a personal preference as I used to work with HiRel electronics for over decade. Sometimes you do something not in line with standard, but idea is that you should know what you’re doing

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rpdom
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Re: Normal cable?

Mon Aug 03, 2020 10:11 am

msl wrote:
Mon Aug 03, 2020 10:04 am
rpdom wrote:
Mon Aug 03, 2020 6:43 am
Such as the i2c wires in an HDMI cable?
HermannSW wrote:
Mon Aug 03, 2020 7:00 am
While only 15cm long cables are officially supported, I use 1m and 2m CSI-2 flex cables routinely without issues for years.
(as long as they do not come close to mains or high voltage/current DC cables)
Good catch with DDC :D
And I didn’t mean to be offensive, it’s more like a personal preference as I used to work with HiRel electronics for over decade. Sometimes you do something not in line with standard, but idea is that you should know what you’re doing
No offence taken. i2c is mostly aimed at short distance communication within a system. HDMI (and VGA) are exceptions to this.
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bullen
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Re: Normal cable?

Mon Aug 03, 2020 11:30 am

@jamesh Thanks for letting us know!
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plugwash
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Re: Normal cable?

Mon Aug 03, 2020 11:55 am

Fancy custom cables in low-volume are expensive. It's much easier to re-purpose an off the shelf cable than to get something custom made.

The pi camera interface has three LVDS pairs, (clock and two data lanes) plus power, ground I2C and two dedicated control lines.

So what cable do we re-purpose?

SATA is out, it only has two differential pairs.
USB3 is out, it has three differential pairs but nowhere to put the I2C and other control lines.
HDMI works, it has four differential pairs and a bunch of other lines.

msl
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Re: Normal cable?

Mon Aug 03, 2020 12:32 pm

plugwash wrote:
Mon Aug 03, 2020 11:55 am
Fancy custom cables in low-volume are expensive. It's much easier to re-purpose an off the shelf cable than to get something custom made.

The pi camera interface has three LVDS pairs, (clock and two data lanes) plus power, ground I2C and two dedicated control lines.

So what cable do we re-purpose?

SATA is out, it only has two differential pairs.
USB3 is out, it has three differential pairs but nowhere to put the I2C and other control lines.
HDMI works, it has four differential pairs and a bunch of other lines.
For re-purposed cable, USB C seems the best option to me due to small connector and more flex cable, compared to regular HDMI. SSTX and SSRX gives 4 high speed differential lines, D+/D- for i2c and use CC1/2 to detect orientation and control switch for SSTX/RX if upside down

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HermannSW
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Re: Normal cable?

Mon Aug 03, 2020 12:55 pm

I just tried and rolled flat ribbon cable.
"vcgencmd get_camera" reports camera detected and raspistill works.
Because of the overlap the total cable length gets reduced.
I did meaure 0.1" as diameter:
20200803_145039.15%.jpg
20200803_145039.15%.jpg
20200803_145039.15%.jpg (157.09 KiB) Viewed 344 times
https://stamm-wilbrandt.de/en/Raspberry_camera.html
https://stamm-wilbrandt.de/en#raspcatbot
https://github.com/Hermann-SW/raspiraw
https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://stamm-wilbrandt.de/github_repo_i420toh264

bullen
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Re: Normal cable?

Mon Aug 03, 2020 2:29 pm

plugwash wrote:
Mon Aug 03, 2020 11:55 am
HDMI works, it has four differential pairs and a bunch of other lines.
Seems to me you answered that one.

The tricky part is how you get the flat connector leads to the wires in the cable though!

Preferable it should be done so that the cable sticks out from the side because most people having trouble have something on top!
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dabateman
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Re: Normal cable?

Tue Aug 04, 2020 12:15 am

I buy these from Amazon, only $14 for 2.
https://www.google.com/amp/s/www.arduca ... 1-set/amp/

Its a csi to hdmi cable adapter. Just make sure the cable that comes with the adapter is inserted in the correct orientation. The first pair I bought were backwards.
They work perfectly fine with the HQ camera module. As long as all camera utilized software is closed you can hot swap modules. I have ones dedicated for visible, IR, full spectrum and UV-A.

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Re: Normal cable?

Tue Aug 04, 2020 12:34 am

HermannSW wrote:
Mon Aug 03, 2020 12:55 pm
I just tried and rolled flat ribbon cable.
I've normally seen it rolled round a longitudinal axis rather than spiral wound, that way it nearly keeps the full length.

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HermannSW
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Re: Normal cable?

Tue Aug 04, 2020 6:54 am

pidd wrote:
Tue Aug 04, 2020 12:34 am
I've normally seen it rolled round a longitudinal axis rather than spiral wound, that way it nearly keeps the full length.
I tried that, but had the feeling the cable woul break. For sure you will not be able to get down to 0.1" diameter possible with spiral. I think OP wants cable for small size(diameter). Reduced size can be easily compensated by using 1m or 2m flex cables for spiral cable (officially supported are only 15cm, but they work fine for me since years).
https://stamm-wilbrandt.de/en/Raspberry_camera.html
https://stamm-wilbrandt.de/en#raspcatbot
https://github.com/Hermann-SW/raspiraw
https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://stamm-wilbrandt.de/github_repo_i420toh264

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