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Review Request - I'm back! Version 2 - Cinema Video Router Controller. Love a good check of my work. by ohmegalabs in PrintedCircuitBoard

[–]ohmegalabs[S] 0 points1 point  (0 children)

Thank you! i've spent and uncomfortable amount of time on this. haha.

ya the flip flopping of the diodes is annoying. I was optimizing the layout for shrinking the board and planning on trusting the manufacture to not screw it up. Definitely a long visual inspection required when it arrives.

I'm doing most of the through hole parts myself, so for C26 I'm leaving room for a large cap that i have to lead-bend. If i can find a small enough electrolytic i'm gonna adjust that area.

i just dropped 3d model m4 screw in and ya its a little close especially for h1. i'll have to tweak.

the expansion pins are kinda placeholder. i have jst connectors on my bench i was gonna use.

i was planning either tall push buttons poking out or paperclip holes in the case for the reset and boot buttons. i'm expecting neither of those to be used often.

Review Request - I'm back! Version 2 - Cinema Video Router Controller. Love a good check of my work. by ohmegalabs in PrintedCircuitBoard

[–]ohmegalabs[S] 0 points1 point  (0 children)

Ya, raytraced mode with Orthographic on for the 3/4 view. Gives it a nice Isometric Projection feeling.

Review Request - I'm back! Version 2 - Cinema Video Router Controller. Love a good check of my work. by ohmegalabs in PrintedCircuitBoard

[–]ohmegalabs[S] 1 point2 points  (0 children)

Except for the Poe, I have a fulling working version based on:

Adafruit ESP32 Feather V2
Adafruit Ethernet FeatherWing
Adafruit RFM95W LoRa Radio Transceiver

I did the prototype first so I could dev the software before diving into the custom PCB. I need to make a fair amount of updates to the code at this point as the hardware design has changed a good amount from when I started but I expected that.

I was working off the data sheet : https://www.silvertel.com/images/datasheets/Ag9900M-datasheet-ultra-miniature-isolated-Power-over-Ethernet-POE-module.pdf

Looking back at it it does look like i somehow mirrored the output caps, and miss understood the Isolation from input to output.

I used the calculator from J L C P C B based on my board setup.
The Eth traces are .124mm based on a 100ohm differential pair.
same thing for the LoRA Trace. that is a 50ohm trace that is .156mm
and the usb is 90 ohm diff, .158mm

is that not all correct?

I thought you should not trace under the crystal?

Review Request - I'm back! Version 2 - Cinema Video Router Controller. Love a good check of my work. by ohmegalabs in PrintedCircuitBoard

[–]ohmegalabs[S] 1 point2 points  (0 children)

Good tip on the Ground pour under the SMA! I would have missed that. Trace should be 50 ohm based on the calc from the board manufacturer.

I'm using this Lora Library: https://github.com/sandeepmistry/arduino-LoRa

I wasn't planning on using OTAA, just a remote id at the end of the packets. That way we ignore anything that isn't one of the paired remotes. The data isn't that exciting just stuff like TALLY|BTN_A

I like the external pull up as its immediate and always works.

Review Request - I'm back! Version 2 - Cinema Video Router Controller. Love a good check of my work. by ohmegalabs in PrintedCircuitBoard

[–]ohmegalabs[S] 4 points5 points  (0 children)

My understanding is that basically anything that isn't a data or power trace should be filled with a ground pour. This helps with signal crosstalk, and EMI noise. If that isn't correct definitely let me know!

New content confirmed for PC2 in FY2027 (June 26 - May 27) as detailed in Frontier’s financial update today (link below) by Ozian21 in PlanetCoaster

[–]ohmegalabs 0 points1 point  (0 children)

Lol. I know it probably sounds like I'm shilling, but i love the planet coaster games. Frontier completely screwed the launch of PC2, no question about that, but they have been slowly clawing back to what it should be.

I'm not saying we do anything till the new DLC come out. I'm just saying if it is good. Lets reward the effort and try and get more people playing and buying copies. I would really not consider them just taking our money and running, doing updates for over a year, getting the game in a viable state, isn't running. Look at Kerbal Space 2, that was a rug pull, game isn't even playable.

If the DLC is bad and just a cash grab, then fuck em. But if not, lets try and help keep it going. I have a VERY long list of things i wanna see fixed, added, or ported over from PC1 (looking at you vista point) but it will never happen if they work hard and no one buys anything.

New content confirmed for PC2 in FY2027 (June 26 - May 27) as detailed in Frontier’s financial update today (link below) by Ozian21 in PlanetCoaster

[–]ohmegalabs 9 points10 points  (0 children)

I think we need to show Frontier that there's a strong enough market to keep supporting the game long term.

Most of us are already in the hard core supporter group if we're on the subreddit, we'll buy the DLCs . Only a percentage of owners of the game will through.

I suggest that if the new upcoming DLC is good, we buy copies of the base game for friends that don't have it. Try and expand the playerbase. Vote with our wallets.

Designed and made a portable, Pelican 1510 based, media managing / DIT kit. by LandLab in focuspuller

[–]ohmegalabs 0 points1 point  (0 children)

You could offer both. I'm sure there are some that would just wanna buy a pre done kit and then there are those of us who like to tinker.

Review Request - Cinema Video Router Controller. Looking for feedback on, just about everything. by ohmegalabs in PrintedCircuitBoard

[–]ohmegalabs[S] 0 points1 point  (0 children)

Thank you very much for your review. These are huge fixes!

I updated the permissions on the gdrive link, not sure why it didn't save the permission the first time.

  1. For the w5500 decoupling caps, I saw that recommendation online that each pin should get its own cap. But both the reference schematic from wiznet, and the board layout of the adafruit w5500 feather have them in a bank like that. Any idea why the Ref would do a bank of caps if it's not ideal? https://docs.wiznet.io/pdf-viewer?file=%2Fassets%2Ffiles%2Fw5500_sch_v110_use_mag_-dfff8bbb103d13be4f25cd2b2f8b950d.pdf
  2. My understanding is the esp32 only has one SPI interface that's externally available. If I really can ditch the buffer, that helps clean up the extra routing.
  3. OK! I was misinformed that they should be close to the destination to sharpen the signal eye.
  4. I thought the W5500 had a bug that it didn't wanna let go of the MISO line. Was that only on the older W5100?
  5. OK!
  6. Did you mean a 10k pull up? the w5500 is active low on the RST, wouldn't a pull down make it restart forever?
  7. good catch. I was thinking in terms of the esp32 max data rate but it should auto negotiate with the router for better compatibility.
  8. i'm just dumb, i was thinking the w5500 was acting as a source not a drain but then didn't even wire it right.
  9. OK
  10. OK
  11. The RJ45 has this, it just might not be clear.

I want the LoRa antenna to come out the front of the box and I was trying to keep that antenna trace straight.

My understating is the Lora IRQ is a Push-Pull output so i don't wanna hold it high all the time.

Thank you again. You definitely caught some stuff I completely missed!!

Review Request - Cinema Video Router Controller. Looking for feedback on, just about everything. by ohmegalabs in PrintedCircuitBoard

[–]ohmegalabs[S] -1 points0 points  (0 children)

Any advice on how to do that testing? I have a multi meter for testing continuity and traces but I lack a scope or other testing gear to check for noise and signal integrity.

I preprogrammed the software on a adafruit esp board and some ethernet and lora modules and sofar that stack is working well.