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LaPOD: Low cost Logic Analyzer probe for MSO5k, DHO900 and more!

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UK:

--- Quote from: oliv3r on November 07, 2023, 10:42:14 pm ---While I get the excitement for the vertical ports, ignoring for a moment that I used the wrong part :p, where in the world would we put the actual traces? I think even going full smd (which still requires the same amount of via's just for the holes to reach the other side, or go hybrid (smd HDMI connectors, throughole IDC connector (or vice versa) we still need a ton of via's just to route all those signals. I've also tried two options, one logical (1, 2, 3, 4) and one shortest trace (2, 1, 4, 3), which gives a rats-nest mess. What I did in the end, per your request, ordering the ports, was only possible by enlarging the PCB by half or full cm, which isn't really an option in this case?

I'd route if if I had any hopes, but with these parts, it would require going with the tiniest pitch, and probably forget about doing length-matched traces ...

--- End quote ---
So we have another challenge here  |O ...the way it can be done is to implement all of that as a stack of two PCBs assembled by two rows of pins on their wide sides (in the style of Arduino Nano).

Pros: doubling the space, separating PCB for HDMI sockets and 50p header, and as a result easier component placement and routing... and cons: 3-4mm additional stack height, doubling PCB cost and additional 10 mins for soldering pins during final assembly ;D

Multi board PCB or multi level PCB is a very common practice when a complex PCB should be fitted in a very tight space.

oliv3r:

--- Quote from: UK on November 07, 2023, 11:49:04 pm ---
--- Quote from: oliv3r on November 07, 2023, 10:42:14 pm ---While I get the excitement for the vertical ports, ignoring for a moment that I used the wrong part :p, where in the world would we put the actual traces? I think even going full smd (which still requires the same amount of via's just for the holes to reach the other side, or go hybrid (smd HDMI connectors, throughole IDC connector (or vice versa) we still need a ton of via's just to route all those signals. I've also tried two options, one logical (1, 2, 3, 4) and one shortest trace (2, 1, 4, 3), which gives a rats-nest mess. What I did in the end, per your request, ordering the ports, was only possible by enlarging the PCB by half or full cm, which isn't really an option in this case?

I'd route if if I had any hopes, but with these parts, it would require going with the tiniest pitch, and probably forget about doing length-matched traces ...

--- End quote ---
So we have another challenge here  |O ...the way it can be done is to implement all of that as a stack of two PCBs assembled by two rows of pins on their wide sides (in the style of Arduino Nano).

Pros: doubling the space, separating PCB for HDMI sockets and 50p header, and as a result easier component placement and routing... and cons: 3-4mm additional stack height, doubling PCB cost and additional 10 mins for soldering pins during final assembly ;D

Multi board PCB or multi level PCB is a very common practice when a complex PCB should be fitted in a very tight space.

--- End quote ---
"But is it worth it", the mini-hdmi breakout board is already smaller afaik :)

Also, the IDC connector was also the wrong one, it was the female kind, but that flipping of the pins, is a triviality and won't affect the rats nest much

oliv3r:

--- Quote from: Mechatrommer on November 08, 2023, 03:19:14 am ---subscribing...

--- End quote ---

I asked the admin to split of the thread, but no reply yet :(

UK:

--- Quote from: oliv3r on November 08, 2023, 01:03:18 pm ---"But is it worth it", the mini-hdmi breakout board is already smaller afaik :)

Also, the IDC connector was also the wrong one, it was the female kind, but that flipping of the pins, is a triviality and won't affect the rats nest much

--- End quote ---
It depends, if you want to have more fun - yes, if just finish this project asap - definitely not  ;)

I've already started working on several mini HDMI board shells.

Mechatrommer:

--- Quote from: oliv3r on November 08, 2023, 01:04:00 pm ---
--- Quote from: Mechatrommer on November 08, 2023, 03:19:14 am ---subscribing...
--- End quote ---
I asked the admin to split of the thread, but no reply yet :(
--- End quote ---
10 pages is still easy to handle ;) and usually like all other threads, the first few pages are the most usefull one anyway, can ignore the rest. ymmv. cheers.

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