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LaPOD: Low cost Logic Analyzer probe for MSO5k, DHO900 and more!
oliv3r:
Anyway, lets break down our options for a moment.
'top full-szie 2x2' entry:
cons:
* requires expensive extra deep/long IDC connector, hard to source, single supplier
* vertical HDMI connectors sticking out quite a bit to the front
* 'base' quite 'high' (top-bottom)
* vertical HDMI connectors have many connection pins, but put a lot of strain on the connector
pros:
* easily fits 4 connectors
* standard leds easily face forward
* strain on the connectors is more equally distributed?
vertical HDMI connectors
cons:
* increases height (makes the breakout fat) and sticks out further due to their longer length
* leds sit next to the connector, making it harder to identify 'is it the one to the left or right'
pros:
* makes all connectors fit nicely
mini HDMI connectors
cons:
* cables are harder to source
* connections are less strong due to the more fragile connector
micro HDMI connectors
cons:
* Much harder/more ugly to route
* much more fragile
* cables not the easiest to source (but certainly possible)
full HDMI connectors
pros:
* easier to route
* much more robust
cons:
may not fit on non-mso5k
(I'm sure we can increase and work on this list more :p) but for now, I think just doing two layouts, mini and full boards. We can always do a 3rd or a 4th too :p the breakout boards are after all the easiest to do. If for example you have both an MSO5k and a DSO900, you may get one each or just use 2x2 one :)
ebastler:
--- Quote from: oliv3r on November 04, 2023, 11:00:15 pm ---for now, I think just doing two layouts, mini and full boards. We can always do a 3rd or a 4th too :p the breakout boards are after all the easiest to do. If for example you have both an MSO5k and a DSO900, you may get one each or just use 2x2 one :)
--- End quote ---
Thanks! I agree that having two options, mini and full-size HDMI, should cover all bases.
For the full-size version, I quite like UK's 2*2 proposal. Maybe the exotic, tall 2*25 connector can be avoided by simply stacking two regular connectors and glueing them together? For the HDMI connector, C168715 looks like the only LCSC part which is meant to be mounted that way. (They also have C2962411 and C711355, which are sold for SMD mounting on a PCB edge but could probably be "abused" as vertical through-hole parts.)
Those vertical connectors should get some mechanical support from a 3D-printed enclosure. But I trust UK will find a stylish solution there! 8)
oliv3r:
--- Quote from: ebastler on November 05, 2023, 07:41:48 am ---
--- Quote from: oliv3r on November 04, 2023, 11:00:15 pm ---for now, I think just doing two layouts, mini and full boards. We can always do a 3rd or a 4th too :p the breakout boards are after all the easiest to do. If for example you have both an MSO5k and a DSO900, you may get one each or just use 2x2 one :)
--- End quote ---
Thanks! I agree that having two options, mini and full-size HDMI, should cover all bases.
For the full-size version, I quite like UK's 2*2 proposal. Maybe the exotic, tall 2*25 connector can be avoided by simply stacking two regular connectors and glueing them together? For the HDMI connector, C168715 looks like the only LCSC part which is meant to be mounted that way. (They also have C2962411 and C711355, which are sold for SMD mounting on a PCB edge but could probably be "abused" as vertical through-hole parts.)
Those vertical connectors should get some mechanical support from a 3D-printed enclosure. But I trust UK will find a stylish solution there! 8)
--- End quote ---
I wouldn't dare putting all those cable stresses on an SMD footprint, but without further ado, the mini HDMI version
One thing I just realized, is that I didn't match the PCB size, but then it also shouldn't matter so much, as the width is different anyway, so having the same depth doesn't add any value.
I did swap the LED pins on the HDMI connector, so I'll have to go back to the other bards and fix that, but still, I think this came out well.
ebastler:
That looks very nice and tidy! :-+
When I mentioned the "board edge" HDMI connectors, that may have read a bit confusing. If you look at the drawings for the three part numbers I mentioned, you will find that they all look very much the same, but the manufacturers give different footprints for them: One with vertical mounting, and through-holes for the mechanical mounting tabs as well as all the pins. The other two for mounting horizontally on the board edge, with the PCB between the two rows of pins, and SMD mounting only. But the parts seem to be more or less the same, so all three could probably be mounted vertically (with through holes).
Anyway, as long as the C168715 part is in stock, that's probably the one to get, because one can be reasonably sure that the footprint is correct.
UK:
--- Quote from: ebastler on November 05, 2023, 07:41:48 am ---Those vertical connectors should get some mechanical support from a 3D-printed enclosure. But I trust UK will find a stylish solution there! 8)
--- End quote ---
For sure!
--- Quote from: ebastler on November 05, 2023, 07:41:48 am ---C168715 looks like the only LCSC part which is meant to be mounted that way.
--- End quote ---
Here you go, C5204145 , C2682172 and short one C711353 ;)
--- Quote from: oliv3r on November 05, 2023, 02:49:31 pm ---I think this came out well.
--- End quote ---
That's true! May be I missed that but why you didn't route channels D0 and D16?
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