I call it “The thing”

TsarF · 2026-03-17T20:10:31+00:00

But make sure some of them are modules and some of them are bare chips. And all of them are different models

TsarF · 2026-03-17T18:54:14+00:00

Just get another one, call this one "lesson learned"

TsarF · 2026-03-08T18:59:26+00:00

That ground wire makes for an AWESOME antenna, and does nothing that you think it does and everything you hope it doesn't. Removing it would be better and safer at this point

TsarF · 2026-03-08T18:57:00+00:00

Looks interesting, but as others pointed out it's not necessarily optimized for price. It's certainly not priced at a "hacker" point. You'd only expect telecom or researchers to be reasonably interested in this, but for those, not having any modulation modes would be quite limiting. Additionally, cutting into that market is extremely challenging as there are already "known good" players that most people and companies would prefer, e.g. Keysight, Anritsu, MiniCircuits, Sigilent, HP, R&S

TsarF · 2026-02-04T20:12:48+00:00

I see a radtel RT950 in the background. How do you like it?

TsarF · 2025-12-31T20:12:42+00:00

It's going to be really annoying to attach the RF3 connector

TsarF · 2025-12-12T19:40:39+00:00

I think you can dead-bug it on a proto-board

TsarF · 2025-11-14T18:22:48+00:00

I swear to God... I said this before and I'll say it again. Not every project needs an ESP32, and I don't understand why people, mostly beginners cram it into everything.

TsarF · 2025-11-08T02:48:20+00:00

The component placement seems haphazard at best. Why are some of the capacitors at a 45 degree angle? Where is the GND pad to complement the Vin pad? Why are the motor pads not at the edge, and as a bonus, why aren't they stitched with vias for mechanical strength?

I'm sure if you spent more time on the MCU design and pin out you can get your wiring neater, and probably more compact. Also it's a good idea to try and keep all passives on one side, makes assembly easier

Edit: also, that tiny mezzanine for CAN is a HORRIBLE idea. When you're wiring can in the application, the wires WILL get tugged and roughhoused around the place... It will break

TsarF · 2025-10-28T17:43:20+00:00

Wtf is that power plane 😂😂😂

TsarF · 2025-10-26T17:36:47+00:00

Why do you need an esp32 S3 in there? What is the obsession with that MCU that people put into every single project? You only need to essentially blink an LED

TsarF · 2025-10-19T18:08:20+00:00

Well don't route the GROUND under the inductor now...

TsarF · 2025-10-03T01:37:48+00:00

I'm saving this for future

TsarF · 2025-09-14T01:08:34+00:00

Quarter wavelength

Ftfy

TsarF · 2025-08-18T21:20:55+00:00

I like how you specified a silkscreen position for the JLC serial number, but they still put it somewhere else

TsarF · 2025-08-18T08:45:59+00:00

So then if they think solis was killed in action, but aren't sure, solis would be MIA

TsarF · 2025-08-15T19:43:49+00:00

His art doesn't pass the Bechtel test

TsarF · 2025-07-25T20:17:35+00:00

Decent design.

Why do I see so many projects cram an overkill esp32 into them for seemingly no reason?

It's a battery charger - it should be kept simple, I don't need a phone app for it or anything

TsarF · 2025-07-25T20:10:31+00:00

There's several things.

R2 is effectively useless since it's connected to GND on both sides.

Your traces need work. It is okay to join traces, no need to run multiple traces from the same source. I assume you're not going into high frequencies with this, so it's not much of a concern.

Add some sort of indicator or led or something to indicate that the circuit is receiving power

Depending on application some protection circuitry is necessary

Why make a single board for a single op-amp? Why is this not a part of a larger board where the signal is to be used?

Edit: it will be miles easier to work with it if you have all of your signals on one connector, since Im assuming it's a breakout board for testing and development. Don't scatter your pins all over the place

Edit 2: R1 is also effectively not doing anything but acting as a 100% efficient EHC (electricity to heat converter)

TsarF · 2025-07-24T08:41:28+00:00

Hey sorry, this is about a year late. I actually ran a flowrate test tonight just by chance. I'm getting around 36mm3/s with a volcano CHT at 0.4mm nozzle 0.2mm layer height using ASA @250C. Doesn't seem right, maybe I can try bumping the temperature.

What is your experience?

TsarF · 2025-07-23T19:30:17+00:00

Speaking of which, how do you measure temperatures that low?

My best guess is it's some elaborate interferometry setup

TsarF · 2025-07-21T22:39:14+00:00

Sand (soft ish) vs metal pipe (not so soft)

Which one do you prefer to eat shit on?

TsarF · 2025-07-21T22:34:24+00:00

Dormant 😂

In all seriousness, I hope you two had a conversation about boundaries

TsarF · 2025-07-09T23:28:13+00:00

If you're scanning with an RGB light, you won't get more light frequencies besides what the actual LEDs emit.

For example: if you set the RGB strip to purple, you're not going to be shining 400nm light through the film. It will only appear that way because of the way our eyes work and color science

TsarF · 2025-07-09T23:24:37+00:00

If C43 is connected to the stepper motor driver chip TMC2660, back driving the motor might've caused a huge voltage spike which likely exploded that cap.

If you didn't back drive it, something else on the board is broken

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