Hacker News: sebcat

New comment by sebcat in "How I leared what a decoupling capacitor is for, the hard way"

sebcat — Tue, 28 Apr 2026 03:47:36 +0000

It's an easy test though and it can be an SMD component and some PUR-coated magnet wire or 30 awg single stranded kynar hookup wire.

Use a small amount of glue from a hot glue gun to fixate it when done, or epoxy if that's your thing. Avoid cyanoacrylate. Not always needed but I imagine a drone moves around alot.

Bodge wiring is a good skill to acquire - PCBs will not always be perfect. Maybe practice on something else first?

New comment by sebcat in "MOnSter 6502: a working transistor-scale replica of the classic MOS 6502"

sebcat — Thu, 04 Apr 2024 09:15:07 +0000

> Not using MOSFETs would make it faster, in theory.

My understanding is that the MOS 6502 was MOS, so MOSFET. Not using MOSFETs would make it less of a replica.

Implementing the replica in an integrated circuit instead of discrete transistors would lower capacitance.

The delay time is a consequence of the capacitance.

New comment by sebcat in "Radios, how do they work?"

sebcat — Tue, 26 Mar 2024 10:24:41 +0000

I was trying to say that a capacitor and diode (detector) is not a complete receiver.

New comment by sebcat in "Radios, how do they work?"

sebcat — Tue, 26 Mar 2024 08:18:23 +0000

Under what circumstances is a diode and a capacitor enough to make a radio receiver?

New comment by sebcat in "Accessing the Pinecil UART with Picoprobe"

sebcat — Tue, 30 Jan 2024 15:17:10 +0000

Doesn't the RP2040 require external qspi flash? What does that cost?

MCP2200 is ~$2.50 in single units and you don't have to deal with firmware or programming.

New comment by sebcat in "How to get coworkers to stop giving me ChatGPT-generated suggestions?"

sebcat — Thu, 11 Jan 2024 04:08:42 +0000

Assuming AI is at the level of average

New comment by sebcat in "How to attach logic probes to tiny SMD components (2021)"

sebcat — Sun, 12 Nov 2023 15:10:06 +0000

PUR-coated copper wire, .15mm diameter is pretty good. .1mm when needed. Use flux, good lightning and some (~10x) magnification.

New comment by sebcat in "Ask HN: Has anyone gotten complete, permanent relief from tinnitus?"

sebcat — Thu, 12 Oct 2023 06:12:40 +0000

Monarda is many plants. Any one of them in particular?

Will I get the same effect drinking Earl Grey tea?

New comment by sebcat in "FM radio wave-based early earthquake detection (2021)"

sebcat — Thu, 14 Sep 2023 11:01:08 +0000

VK2 is New South Wales, not sure what the seismic activity is there but they do appear to get earthquakes according to Wikipedia.

New comment by sebcat in "Ask HN: IP cameras that don't require an app or internet?"

sebcat — Fri, 23 Jun 2023 19:11:50 +0000

Still used a bunch of CRIS cores for ARTPEC-6 for scheduling scaler and trfm jobs and some other things, are they completely gone now?

New comment by sebcat in "The world's largest "radio" station (2005) [pdf]"

sebcat — Wed, 21 Jun 2023 11:42:35 +0000

2200 meter is LF (30-300kHz). Used mainly with huge coils and low power (1W EIRP). then there's VLF (3-30kHz). Then there's ULF (300Hz-3kHz) Then there's ELF (below 300 Hz), used by the stations in question. To put things into perspective.

Speaking of VLF, SAQ will broadcast on 17.2 kHz on July 2nd. You can pick it up with a soundcard directly (not using a DVB-T chip) depending on your location and use of antenna.

New comment by sebcat in "FlipperZero: 1 Month Battery Life with Firmware Update"

sebcat — Fri, 28 Apr 2023 10:01:35 +0000

See https://github.com/F5OEO/rpitx

New comment by sebcat in "Three Sisters (Agriculture)"

sebcat — Tue, 11 Apr 2023 07:03:49 +0000

You need crop rotation for beans at least. To lower the risk of parasites and deceased.

New comment by sebcat in "Three Sisters (Agriculture)"

sebcat — Tue, 11 Apr 2023 06:18:59 +0000

My experience is that it's hard to get right, messes with crop rotation and lower yield.

I've had beans overtaking the maize and I've had squash overtaking the beans.

YMMV.

New comment by sebcat in "Establishing a UART Root Connection to a TP-Link Wireless Router"

sebcat — Wed, 29 Mar 2023 12:24:33 +0000

If you're into electronics, having a couple of MCP2200 in your drawer is also handy. Gives you some GPIOs as well.

New comment by sebcat in "Cyclists now outnumber motorists in City of London"

sebcat — Mon, 20 Mar 2023 18:31:36 +0000

> you will not kill someone if you ride after a night drinking

You might however end up at the hospital doing that, or worse.

New comment by sebcat in "Iatrogenics: Why Intervention Often Leads to Worse Outcomes"

sebcat — Sun, 12 Feb 2023 13:25:20 +0000

Does intervention lead to worse outcomes more often than not?

New comment by sebcat in "NRC Certifies First U.S. Small Modular Reactor Design"

sebcat — Sat, 21 Jan 2023 06:45:36 +0000

Surely there are worse cases for a sub than this?

New comment by sebcat in "Finishing what you start makes teams more productive and predictable"

sebcat — Mon, 25 Jul 2022 06:49:21 +0000

You get a pretty good ratio by doing very little using only that metric.

New comment by sebcat in "Raspberry Pi Pico Hack Unlocks Two Extra “Hidden” GPIO Pins"

sebcat — Fri, 22 Jul 2022 04:53:40 +0000

From the Reddit thread the article is based on, OP says:

> I want to run an unmodified QMK firmware so I can keep up with updates without having to continually merge my changes into HEAD, and in my research with IO expanders I would have to rewrite the matrix scanning code.