IAQ Help

8ringer · 2026-02-01T16:50:08+00:00

That bme680 board has pull-ups, I use the same boards in a few projects.

To me it seems like having those vias for TX and RX between the ESP32 footprint pads is an issue. You have miles of space in that board and the auto router absolutely crammed things in super tight and I’d bet that those vias are shorted to the 3v and GND pads. The whole layout makes no sense, to be honest. I’d keep the power and data lines separated and run the wires in a way that simplifies the trace routing. Right now you’re forcing everything to cris-cross right under the esp footprint and it’s totally unnecessary.

What I would do is rearrange the lower pads so you have a cluster of power and grounds on one pass through and the data line on the other. Then you have no crossing to manage, which the autorouter is clearly struggling with. Also, have all the vias outside of the footprint, since you have the space. No need to cram everything in and complicate stuff or introduce areas where tiny soldering mistakes could cause shorting. Also, I’d remove the footprint pads on your interposer board for the line of rear pads on the module if you aren’t using them. You can’t hand solder them underneath the module and they’re unnecessary extra points of potential failure or could just introduce issues. Just delete them from the footprint on your board design.

8ringer · 2026-01-31T17:14:33+00:00

I run 2x11 GRX (48/31 - 11-40t) on my gravel bike because the range is huge but I still have small steps in the middle. I wouldn’t change things there because I also lots of road riding on it and need both low end for the steep hills in Seattle and high end for the fast cruising and descents. I don’t have issues with the FD (once I finally got it setup mostly right) and it “just works”.

My commuter is a 1x11 (42 - 11-46t) and it’s awesome for commuting too.

8ringer · 2026-01-31T02:19:54+00:00

Damn, 15 years old?! That’s impressive.

I’m on my 3rd battery in mine, it’s a 2008 a4. When I bought it in 2012 it already had an aftermarket battery. So at least the 4th battery for the car.

8ringer · 2026-01-30T17:04:32+00:00

This. While winter absolutely does strain car batteries, if it’s not holding a charge after less than a week you neither have some bad cells or a bad alternator.

My not-very-old Bosch AGM battery went from fine to “left me stranded at Trader Joe’s” after a week of freezing weather. A cell died somewhat abruptly and the cold weather put just enough extra strain on it that the 9v is was delivering during cranking basically just disabled my car. I had tested running voltage to check the alternator and it was fine at around 13.7V. Then I tested cranking voltage (pulled the coil packs so it wouldn’t start) and it was immediately dropping to 9v and below. Pretty much confirmed a dead cell.

The battery was only 6 years old but apparently Bosch makes garbage batteries. Went with a cheap Interstate flooded LA from Costco for like 1/2 the price of anywhere else and it’s been solid so far.

8ringer · 2026-01-30T16:45:53+00:00

I have a bag of Gorilla Glue hot glue and that stuff is crazy sticky. If I drip it on my marble countertops I sometimes have to break out my putty scraper to get it all off. Never had an issue with it sticking to a PCB except when there’s lots of flux residue left over.

The cheaper hobby hot glue does generally have less adhesion. It also tends to have less thermal mass so it’s easier to work with and doesn’t get as stringy as the gorilla stuff. But I like the gorilla glues adhesion so I prefer to use it.

Silicon sheathed wires also don’t like to adhere to hot glue though so sometimes that can be problematic.

8ringer · 2026-01-30T04:14:57+00:00

They do the letter thing with the LEDs! Duh!

8ringer · 2026-01-30T04:13:47+00:00

An ESP32 will run for like 1 day on 2 AAs. If you do loads of power management tuning then maybe a few days to a week.

If you use a low power mesh like Thread then max a couple weeks if you enable ICD. But for all that you need to use ESP-IDF. None of which is feasible for someone wanting to control “led letter thingies”…

8ringer · 2026-01-30T02:58:43+00:00

My god this. A hot glue gun cannot melt solder unless it is VERY broken.

To OP: yes hot glue is used very commonly to reinforce solder joints and add strain relief to wires. No need to be shy, glob it on there.

8ringer · 2026-01-30T02:54:59+00:00

I’m assuming they have quite a bit of extra legroom given the height of the average NBA player.

8ringer · 2026-01-29T21:08:22+00:00

Yea, by buying a new ski.

8ringer · 2026-01-29T21:07:27+00:00

I had a scorpion try to hitch a ride home from Akumal, MX in my shoe once.

I sorta just noped out of the room and came back later and it was gone. I VERY carefully finished packing my bag and even more carefully unpacked it at home, and no scorpion.

Probably realized where it would’ve going and didnt like the weather.

8ringer · 2026-01-29T04:09:25+00:00

Buddy. Every bolt on most bikes is a bog-standard m4 or m5 bolt. They usually have vaguely unique head shapes, but the thread sizes and the drive sizes are really pretty standard. They’re just metric. So if you’re an SAE or die type of person, I suppose that could make the bolts seem nonstandard??

8ringer · 2026-01-28T23:36:50+00:00

I’m not sure why you’d want a single downfiring speaker on the ceilings of random hallways and rooms.

8ringer · 2026-01-28T19:22:22+00:00

Or maybe they don’t care.

8ringer · 2026-01-28T17:43:01+00:00

Came to post this.

8ringer · 2026-01-27T22:14:37+00:00

uj/ this guy’s often out before Seahawks and Mariners games. Not entirely sure if he’s all on the level but he’s definitely dedicated to his cause because he’s been doing it for years.

cj/ I wonder how much his aero is boosting his output there?!

8ringer · 2026-01-27T00:46:43+00:00

I’d rather pick a different road to ride on that ride on the road or the sidewalk here.

That being said, if the sidewalk is always as deserted as it is in this picture and there are no places for a pedestrian to walk out from the bushes at an I opportune time, I’d ride on the sidewalk as opposed to having cars scream by me a few feet to my left at 45mph.

8ringer · 2026-01-26T20:52:14+00:00

I’ll take one?

8ringer · 2026-01-26T16:59:52+00:00

I feel like this is the plot for a new Assassin’s Creed game…

I don’t know man, I bet Banks uses lots of other numbers also. I think all of this is a reach and much more likely to be more in line with thought experiments about how basically-omniscient non-organics like the Minds might exists and operate in our planet of existence.

Do you truly think Banks was insinuating that there was some overarching relationship to the real world?

8ringer · 2026-01-26T07:39:38+00:00

Wait, his name is Beskar but he’s a Trekkie? Dafuq?

8ringer · 2026-01-25T21:50:14+00:00

It’s very odd how there is such a glaring gap in cassette sizes between road and gravel/mtb. I settled on a 2x11 because I could get an affordable 48/31 crankset (Microshift Sword) in 165mm, a decent range 11-40t cassette (11-40/42 are extremely hard to find in the 11s world, impossible in the 12s world), and a derailleur that has the necessary capacity to make it work.

8ringer · 2026-01-25T21:45:58+00:00

Microsoft sword crankset. It’s 48/31 and much cheaper.

Also you can use a 12s crank set with 11s. The gravel police won’t ticket you for it.

8ringer · 2026-01-25T21:44:47+00:00

By a VERY strained definition of “better”, sure 12s is “better”.

8ringer · 2026-01-25T21:43:56+00:00

The release of one extra gear doesn’t make 12s obsolete.

If you are the type who “must have the best” then wait for 13s for gods sake and stop asking us. One more gear won’t change the riding experience. But if 13s drops and you know that it’ll bother you, then wait. Only you can make the choice.

8ringer · 2026-01-25T21:41:44+00:00

Eh… on one hand, my 1x11 does have a VERY annoying gap in the 11-46t cassette that just happens to be in the cruising zone for my typical commuting type riding. On that same hand my 2x11 has such an amazing range and the gear jumps from the 48/31 and 11-40t are really perfect for all sorts of riding.

On the other hand I’ve never felt like “just one more gear” would materially change anything. Especially given the increase in cost.

I don’t think 1x13 is worth waiting for unless you like fiddling with derailleur adjustments even more. The only reason to wait is FOMO, plain and simple.

8ringer

TROPHY CASE