Doub
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Buying authentication chips

Wed Jan 16, 2019 4:24 pm

For a hobby project I need some kind of compact computer with a qHD (or better) 60FPS camera sensor interface and HDMI output. The Raspberry Pi Zero with the camera v2 is almost perfect for that. But I need the image sensor on a rigid PCB with specific size constraints. It looks like it should be possible to order some custom camera design from China for hobby-level money, but then it wouldn't work because it doesn't have the right keys in the ATSHA204A authentication chip.

I understand why that chip is there, and I won't discuss the Raspberry Pi project decides to finance itself.

However it looks to me that you could get the same amount of money you make on a camera board by selling the preprogrammed chips by themselves, and that would significantly reduce waste compared to forcing me to buy full camera modules and desolder the chips from there. Is that something you would consider?

6by9
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Raspberry Pi Engineer & Forum Moderator
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Re: Buying authentication chips

Wed Jan 16, 2019 5:59 pm

No. It's far too much effort for the potential market.

You could separate the camera board and the sensor.
viewtopic.php?f=43&t=231095 links to an Aliexpress seller of the sensor only on a longer flexi. There are of course no guarantees that it'll work, nor that it would pass EMC testing (the oscillator is on the camera board and single ended, so it'll be spraying 25MHz around the place merrily if on a long flexi).
Software Engineer at Raspberry Pi Trading. Views expressed are still personal views.
I'm not interested in doing contracts for bespoke functionality - please don't ask.

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HermannSW
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Re: Buying authentication chips

Sat Jan 19, 2019 10:21 am

6by9 wrote:
Wed Jan 16, 2019 5:59 pm
No. It's far too much effort for the potential market.

You could separate the camera board and the sensor.
https://www.raspberrypi.org/forums/view ... 3&t=231095 links to an Aliexpress seller of the sensor only on a longer flexi. There are of course no guarantees that it'll work, nor that it would pass EMC testing (the oscillator is on the camera board and single ended, so it'll be spraying 25MHz around the place merrily if on a long flexi).
There is another cheap "camera module (without driver PCB)", with really short flexi, which should avoid/reduce the "spraying around" if EMC testig is needed:
https://www.raspberrypi.org/forums/view ... 9#p1418635
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⇨https://stamm-wilbrandt.de/en/Raspberry_camera.html

https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://gitlab.freedesktop.org/HermannSW/gst-template
https://github.com/Hermann-SW/fork-raspiraw
https://twitter.com/HermannSW

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