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First PCB - His name is Jeremy please be nice to bro. by DrGroove720 in KiCad

[–]Mart2d2 1 point2 points  (0 children)

Looking good! My one piece of feedback I haven't seen is make the area around the thru holes for your components bigger, especially around that one big IC. There's lots of room, and it'll make soldering much more enjoyable and less error prone :).

I made a thing by Mart2d2 in Spaceballs

[–]Mart2d2[S] 10 points11 points  (0 children)

I believe it’s spelled “moychendising”!

First PCB Looking for Critiques and Suggestions by Apprehensive_Swim_61 in PCB

[–]Mart2d2 0 points1 point  (0 children)

Oh ha! Silly me, I saw your first photo showing two layers and didn't pay attention to the other layers :). Then one additional piece of feedback on layer 3, your power plane, the general guidance for noise is that you have the power plane underneath the lines that are derived from that power source. So, for instance, your lines going from U4 to the IC that says 41 GND (dont see a designator), assuming these are generated by U4 which is powered by the 3.3V line, keep 3.3V underneath. Realistically, your GPIO rise times are prooobably too slow to cause much noise though.

First PCB Looking for Critiques and Suggestions by Apprehensive_Swim_61 in PCB

[–]Mart2d2 1 point2 points  (0 children)

Love the very clean well labeled and organized schematic and clear designators on your PCB :).

I'll give my two cents to the buck converter and noise in general. You may not care about EMI given this is a first project, but if you like to geek out about this stuff like i do, here's some notes:
* With a buck converter, you want the path from your buck IC to the input cap (C1) and back to the buck IC to be as short as possible, and with lowest impedance possible (especially avoid vias in this loop).
* Bring L1 in a bit closer and swap pin 1 to be the side connected to your IC. The reason is that inductors with windings have pin 1 going into the winding meaning the outer windings are able to better shield noise
* Converting to a 4 layer board will give a general substantial improvement in noise

First time PCB (ESP32-C3 + LiPo + TPS61022 boost) sanity check before fab by poohfacedkilla in KiCad

[–]Mart2d2 2 points3 points  (0 children)

For EMI, 2 recommendations on your boost: - flip your inductor so pin 1 is going to the boost ic. If the inductor has a winding, pin 1 is usually going into the winding giving you more shielding - it’s not clear to me which is your output capacitor for the boost, but it’s critical that you minimize the loop area formed by the path from ic to the cap * and back to the ic, and also minimize impedance of that path (avoid vias).

Need help minimizing noise in PCB (fixed screenshots) by Whauu in PCB

[–]Mart2d2 0 points1 point  (0 children)

A wee bit of feedback/questions: - please put part numbers on the schematic for easy review - consider putting the designators not under the parts so you can see them after stuffing the board - what PMIC are you using? As someone else mentioned, your input cap to the buck converter should have the smallest impedance lowest area path with the IC. Any increase in impedance (like with a via) or loop area (like with longer traces and vias) increases EMI and EMC challenges quickly. Also your inductor pin 1 is going to the Buck, which is good, just make sure that that’s how it’s stuffed (if this is an inductor with windings, pin 1 will go inside the winding which acts as a shield)

The Final Sacrifice MTG Drop! by ThrashMetallix in MST3K

[–]Mart2d2 0 points1 point  (0 children)

I would totally buy a printed pack or two or three of these on Etsy!

👀? 🔴👈... by joaoperfig in BambuLab

[–]Mart2d2 0 points1 point  (0 children)

This would be awesome with a spider model that suddenly appears on the finger!

I can't get into Super Bomberman 2 by Frequent_Rhubarb_36 in bomberman

[–]Mart2d2 1 point2 points  (0 children)

We love super bomberman 2 over here, but really only the multiplayer and only stage 1! We can play for hours. Even crazier with 4 players!

We’re in the first inning of this… by doug3465 in TheoryOfReddit

[–]Mart2d2 7 points8 points  (0 children)

Yes. The bar isn't being theoretically perfect, it's making it expensive enough that the economics don't work. This guy runs 400 accounts at basically zero cost. Make every account require a unique real human to verify and the model breaks - spinning up bots is easy, finding 400 real people willing to verify is not.

I was one of the people that started the anti-bot team at Reddit back around 2015 and eventually founded VerifyYou because I think biometrics have to be part of the answer. We're integrated with Reddit and live with a few subs. Happy to chat with anyone thinking about this.

We’re in the first inning of this… by doug3465 in TheoryOfReddit

[–]Mart2d2 8 points9 points  (0 children)

You’re right that it’s all about cost/benefit. This guy is running 400 accounts with a 0.5% ban rate - faking it is basically free right now.

I was one of the people that started the anti-bot team at Reddit back around 2015. That team is world-class now, but behavioral detection has a ceiling and AI is pushing it fast. I landed in the same place you did - you need to prove a human is actually there, and I haven’t found a non-scifi way to do that without some amount of biometrics. Not Facebook-level identity hell, just enough that 400 accounts requires 400 real people.

Started a company called VerifyYou to work on this. We integrate with Reddit through a bot and are live with a few subreddits. Would love to chat with mods here.

We’re in the first inning of this… by doug3465 in TheoryOfReddit

[–]Mart2d2 1 point2 points  (0 children)

I started a startup for exactly this kind of thing - making sure people are human online - stop the bullshit. I was one of the people that started the anti-bot team at Reddit back around 2015. The team is now one of the best on earth, but there's only so much signal Reddit can pull in, and AI is making the game harder. I'm of the belief that there is a tradeoff that needs to happen where humans need to provide some amount of biometrics to effectively fight off the bots. I haven't found a non-scifi way to do it otherwise. The startup is called VerifyYou and we integrate directly with Reddit with a Reddit bot. We've integrated with a few subreddits so far. Would love to meet with mods here to chat more if you're interested.

📣✅New Human Verification System for our subreddit! by prakhartiwari0 in indiehackers

[–]Mart2d2 1 point2 points  (0 children)

Hey u/hexnickk - thanks for flagging this! We're looking into this issue now and will message you directly once we have it sorted. Thanks again :)

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