u/June_Ctreras

▲ 9 r/defi

Realized something at a Lisbon bakery this weekend about what my crypto card "balance" actually means

I've been splitting spending between two cards for a few months. Crypto.com card for most things because the cashback is real and the UX is honestly fine, and a Gnosis card for when I feel like paying straight from my own wallet. Mostly curiosity, not ideology. Self-custody UX is still clunky enough that I never really felt the difference.

Saturday morning I'm at a bakery and the Crypto.com card declines once, then goes through on the second tap. Five seconds of mild panic, normal stuff. Walked out and looked at the app, no issue flagged, balance fine, transaction fine. Probably the terminal.

But then I'm walking and the thought lands that during those five seconds I had basically no idea what state my money was in. I had a balance on a screen and an app I trust to be telling me the truth. If that decline had been a soft freeze on their end while they ran some compliance check, my "balance" wouldn't have actually been mine, and I'd have no recourse other than waiting for an email reply. The screen number isn't custody. It's a claim against the platform.

Used the Gnosis card at the next place and the mechanics of it are still worse. Pre-funded, slower to top up, more steps. But the screen number is just a view of what's actually in the wallet. Same number whether the app is open or not.

The thing I keep getting stuck on is that the marketing pitch for self-custodial cards always leans on "no KYC" or "censorship resistance" or whatever, and that's not really true. I went through full KYC for the Gnosis one. Same forms, same wait. The actual benefit is much smaller and much more boring, which is that between transactions the money is sitting in a wallet I control, not in their float. For something as mundane as a bakery run that distinction sounds pedantic. After the five seconds of staring at a declined screen with no information, it doesn't.

Still using the Crypto.com card for most things to be honest. The UX gap is real. Just don't think I'll be able to look at that balance number the same way again.

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u/June_Ctreras — 5 days ago
▲ 2 r/ECE

First time sending a small batch out to an EMS, trying to figure out what "small batch capable" actually means in practice

Junior EE here, about a year and a half in. We've been hand-building this sensor board internally, maybe 15 boards so far, and now my manager wants me to drive the first small batch out to an EMS. 60 boards for a customer pilot, probably a few hundred more if the pilot goes anywhere.

Board is nothing crazy on paper. 4 layer, mostly 0603 and 0402, one 0.4mm QFN, an ADC in a small package I'd rather not name, couple of inductors that are annoying to place. The catch is the use case needs conformal coating (humidity), and the customer wants nitrogen reflow on the assembly because of some reliability requirement they hold on a related product line of theirs.

RFQ went out to four shops. Two domestic, two overseas. Every reply says they handle small batch, handle N2 reflow, handle conformal coating, ISO 9001, IPC-A-610 class 2 or 3 on request. Quotes came back across roughly a 3x spread, and the most expensive one is not the one with the most certifications.

I've cleaned up the BOM, ran a DFM pass on the panel (caught two clearance issues around the QFN), drafted a rough fixture spec for bed of nails. Asked each shop for sample boards from a comparable past job. Two sent something, two said NDA which I get.

The actual problem isn't the spec, it's picking. Senior folks here keep telling me "they all say they can do it, half of them can't," but nobody's been specific about what they actually look at. I've been going back and forth between leaning on FAI process, asking for a virtual line walk, or just paying for a 10 board qualification run at the top two before committing to 60.

The bit I keep getting stuck on is how you tell from the outside if a shop has nitrogen reflow dialed in on a real line, versus quoting it as a line item because they can hook up a tank when needed.

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u/June_Ctreras — 9 days ago

First biological age test came back 4 years older than me and now I don't know what half my stack is doing

Did one of those methylation panels last year, mostly vanity. Sleep is good, I lift, food is fine, basic supplement routine. Figured it'd come back a year or two younger and I'd feel smug about it. Came back 3.8 years older. Didn't open the PDF again for like two weeks.

I know half the threads here call these tests snake oil and honestly I'm not fully sold either. But the number annoyed me enough that I started actually looking at what I was taking and why.

Turns out the answer was pretty embarrassing. Magnesium nightly because it helps me sleep, fish oil because that's just what you take, B complex when a work week got rough, D more out of habit than conviction. Every single thing was about how today or this week went. Nothing in there was aimed at whatever the test was supposedly measuring.

Went pretty deep on oxidative stress and mitochondrial stuff after that. Realized a lot of what I'd been swallowing probably never makes it to the cells that would actually benefit from it, which is its own kind of depressing. Whole different category of compounds I'd never paid attention to.

Curious to hear from people who've retested after restructuring their stack, trying to figure out what's actually signal on these panels.

reddit.com
u/June_Ctreras — 15 days ago

Got into a state park about 90 min before activation on Saturday and the forecast lied. Was set up under a tarp by the time the first band of rain hit, FT-891 stayed dry under a dry bag but my HT (D878UVII) was clipped to my belt the whole time and got pretty soaked. It still works but the speaker is muffled now and the rotary encoder feels gritty. Probably fine, will let it dry out properly this week.

But it got me thinking. I've been at this almost 3 years, mostly POTA and casual repeater stuff, General class. Every HT I've owned has been ham-grade, nothing rated for anything serious. I see people in the parking lot at multi-op events with what look like utility company radios, big rubber housings, intrinsically safe stickers and all, and I always assumed those were like $1500 each and total overkill for what we do.

Then I went looking last night and learned there's a whole world of commercial DMR portables with actual IP67/IP68 ratings, built for industrial use. Some of them are rebranded for ham use, some are pure commercial that people program with CPS software. Used market on eBay seems pretty active.

I get that for repeater contacts and POTA the spec sheet is way overkill. But I also don't love the idea of replacing an HT every couple of years because it ate one bad weekend. Not sure if it's worth the price jump, the programming pain, or if I'd actually feel a difference versus just throwing my D878 in a Pelican case.

Half of me thinks I'm just rationalizing buying another radio. The other half doesn't want to lose another $300 HT to weather I should've planned for.

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u/June_Ctreras — 23 days ago