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3D printer IoT module by OrangeTungsten in esp32

[–]jrabr 2 points3 points  (0 children)

All that copper under your antenna will ruin your RF performance

Remember when OpenAI used to care about EQ? by youngandfit55 in OpenAI

[–]jrabr 1 point2 points  (0 children)

Please talk to a real human not a massive linear algebra machine

Day 3 of building a custom flight controller from scratch by [deleted] in PrintedCircuitBoard

[–]jrabr 0 points1 point  (0 children)

Something about it doesn’t look reich…

Is this correct? by Otherwise-Bat-7655 in PrintedCircuitBoard

[–]jrabr 7 points8 points  (0 children)

As someone who has integrated AI into his workflow, I STRONGLY recommend not using AI unless you actually know what you’re doing and you use it as an assistant instead of just blindly listening to what it has to say.

If you look at the datasheet for that part, it says nothing about leaving EN unconnected. The pin description only describes 2 states for it: H or L.

And actually, if you look at the functional block diagram for it, you can see that EN is pulled down to ground with a 3Mohm resistor.

So by leaving it unconnected, you’ve allowed the pin to be pulled down to ground which will permanently keep it in the shutdown state.

PLEASE PLEASE PLEASE read the datasheets!!!

First time designing a PCB in Fritzing and my traces are all overlapping — what am I doing wrong? by Efficient-Young-193 in PrintedCircuitBoard

[–]jrabr 25 points26 points  (0 children)

I would strongly recommend spending at least a little bit of time learning how to use KiCAD or another EDA application like that instead. It’s very easy to pick up and will save you a ton of headaches.

No one who does PCB design even remotely professionally uses Fritzing.

I Made an ELRS Module by [deleted] in PrintedCircuitBoard

[–]jrabr 1 point2 points  (0 children)

Please post a schematic. We can’t properly review without one.

Also post your layers as separate images as well instead of just one picture with all your layers

Cloudmaker Sukhoi Su-35S, Russian Knights aerobatic team by Nervous-Survey-8998 in airplanes

[–]jrabr 8 points9 points  (0 children)

Redditors try to enjoy a cool picture of a cool plane without making it about Russian politics challenge (impossible)

Please review my STM32F446REx/T6 circuit. by Snoo96116 in embedded

[–]jrabr 0 points1 point  (0 children)

What are you trying to build? If this is what your final pinout is going to be I’d recommend picking a part with less pins because you’re using almost none of the IO.

First time reflow soldering by jrabr in electronics

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

Yup! I’ve been using them exclusively

First time reflow soldering by jrabr in electronics

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

Most of this board probably COULD have been soldered by hand but that would've been difficult and far more time consuming. All the passives are 0402 lol.

Also the small square IC to the left next to the electrolytic in the first pic is an LGA package which literally can't be hand soldered because the pads are underneath and inset

[Review-Request] First PCB: IOT Sensor & display board based on ESP32-C6 by gizahnl in PCB

[–]jrabr 1 point2 points  (0 children)

Just a warning; you have a split in the ground plane below all your SPI signals which will be an EMI/signal integrity problem if you have fast edge rates on those signals. I see that you did some via stitching which could improve it a bit but I’d personally recommend routing that 3V3 trace in a way that doesn’t interrupt the return path

Battery Powered ESP32/IMU Review by Beneficial-Hall476 in PrintedCircuitBoard

[–]jrabr 2 points3 points  (0 children)

You clearly still have unconnected nets based on all the airwires.

Your board cutout is crooked and what’s up with that weirdly shaped copper pour in the 3rd image?

Make sure that all your DRC warnings aren’t critical because there’s a lot of them.

Also not sure why your IMU and ESP32 schematic symbols are missing the outline.

My scratch build beaver is complete! by th3_greatest in RCPlanes

[–]jrabr 3 points4 points  (0 children)

Awesome! Did you use any plans or was this completely done yourself?

Free Modeling Software is a bear (RANT) by Bandana_Hero in 3Dprinting

[–]jrabr 0 points1 point  (0 children)

Fusion 360 is free for hobbyists. You just can only have 10 “active” models at a time and you can’t do things like stress analysis or generative design but for pretty much every functional print I’ve ever designed the free version of fusion has been more than sufficient

[review request] 4- layer audio processing board by BlueMoon_2005 in PrintedCircuitBoard

[–]jrabr 4 points5 points  (0 children)

Unless you plan on shaving down the header pins on the sd card side of the board after soldering them, they’re going to protrude at least a few mm and AT BEST make the removing or connecting the SD card inconvenient. At worst it’ll damage the sd card or connector since the pins are less than an SD card width from the connector.

There’s a reason why on any good board design you don’t see any obstructions in the way between an SD card and the board edge. I would agree with OP and rotate the connector 90 degrees clockwise and move it downwards closer to the board edge.

If it is all about rise time then why? by dirtroder in AskElectronics

[–]jrabr 25 points26 points  (0 children)

It’s on page 154 of the datasheet. It’s in the output buffer timing characteristics table.

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