Hacker News: mrheosuper

New comment by mrheosuper in "Two computers, one monitor, zero fiddling (2025)"

mrheosuper — Tue, 19 May 2026 08:50:43 +0000

Probably debouncing, when anything/any events happen, you have to ask yourself, did this event truly happens, or just some weird glitch and can safely ignore it.

New comment by mrheosuper in "Designing an FPGA Calculator from Scratch"

mrheosuper — Tue, 19 May 2026 08:34:44 +0000

i was thinking of using FPGA to control led matrix, the algorithm is not hard, it's just there are too many pin to control, they need high clock rate if you want high color depth, a using MCU bit bang is not really a choice.

New comment by mrheosuper in "I hate soldering"

mrheosuper — Tue, 12 May 2026 15:54:23 +0000

Apply heat to thing you want solder to stick to, not to the solder wire.

There is no such thing as "too much flux" (Actually there is, when doing BGA reflow, but that's advance topic)

New comment by mrheosuper in "I hate soldering"

mrheosuper — Tue, 12 May 2026 15:48:19 +0000

1 mistake I see a lot of beginners make is, they bite more than what they can chew.

You can not suddenly be able to replace your PS5 HDMI port if you've never soldered before. Also you need the right tool, a $20 solder is never enough.

Soldering is a skill, you need to practice.

New comment by mrheosuper in "The Serial TTL connector we deserve"

mrheosuper — Sun, 10 May 2026 06:14:40 +0000

you are over-engineering it. At the end of the day, it's a debug connector, when you use it, you should know what you are doing. The more thing you add to debug connector, the more thing you have to debug when the debug connector not working.

New comment by mrheosuper in "How LEDs are made (2014)"

mrheosuper — Sat, 09 May 2026 18:21:38 +0000

China has improved a lot in commerical, high power LED. 10 years ago, they could not even touch the performance of CREE or Luxeon or Osram LEDs, now thay are on par in term of performace, and much cheaper.

New comment by mrheosuper in "How LEDs are made (2014)"

mrheosuper — Sat, 09 May 2026 18:18:39 +0000

I doubt it would even be true 10 years ago. This article is from small-mid scale led production.

New comment by mrheosuper in "Show HN: PanicLock – Close your MacBook lid disable TouchID –> password unlock"

mrheosuper — Sat, 18 Apr 2026 12:33:55 +0000

Can you intentionally use the wrong finger so that it will force to enter password

New comment by mrheosuper in "PCBWay sponsorship: full-size SD module for Arduino projects"

mrheosuper — Wed, 15 Apr 2026 12:23:15 +0000

For some small channels, $100 could be more than what youtube pays for their video.

And PCBway sponsors a lot of channels.

New comment by mrheosuper in "A new spam policy for “back button hijacking”"

mrheosuper — Tue, 14 Apr 2026 15:31:07 +0000

Nice. This has been existed for too long.

New comment by mrheosuper in "How NASA built Artemis II’s fault-tolerant computer"

mrheosuper — Fri, 10 Apr 2026 17:52:22 +0000

A lot of "space-rated" components come from consumer space, with certification that it can work in space.

IIRC the Helicopter on Mars using the same snapdragon CPU in your phone.

Also, bit flip can happen without you knowing. A flip in free ram, or in a temp file that is not needed anymore won't manifest into any error, but then, your system is not really deterministic anymore since now you rely on chance.

New comment by mrheosuper in "How NASA built Artemis II’s fault-tolerant computer"

mrheosuper — Fri, 10 Apr 2026 17:22:36 +0000

I believe this is kind of survivor-bias. It's very rare that RTOSes have to handle allocating GBs of data, or creating thousands of processes. I think if current RTOSes run the same application, there would be no noticeable difference compared to mainstream OS(Could be even worse because the OS is not designed for that kind of usecases)

New comment by mrheosuper in "France to ditch Windows for Linux to reduce reliance on US tech"

mrheosuper — Fri, 10 Apr 2026 16:58:55 +0000

It needs just 1 successful attemp.

New comment by mrheosuper in "Ask HN: Any interesting niche hobbies?"

mrheosuper — Thu, 09 Apr 2026 07:52:30 +0000

Is this similar to meshtastic? I've heard about it for a while.

New comment by mrheosuper in "Teardown of unreleased LG Rollable shows why rollable phones aren't a thing"

mrheosuper — Thu, 09 Apr 2026 07:36:37 +0000

Can be solved with magnets and friction i guess.

New comment by mrheosuper in "Apple discontinues the Mac Pro"

mrheosuper — Fri, 27 Mar 2026 08:58:10 +0000

The article is nearly 3 years old and the 4080 is not even top of the line at the written time.

Still, 10% in difference is still considerable, almost gen-to-gen difference

New comment by mrheosuper in "Apple discontinues the Mac Pro"

mrheosuper — Fri, 27 Mar 2026 04:22:29 +0000

>That workstation on your desk should justify its presence

It does the work you want it to do is not enough to justify its presence ?

New comment by mrheosuper in "Apple discontinues the Mac Pro"

mrheosuper — Fri, 27 Mar 2026 04:16:15 +0000

Your example uses GTX1080, which is a very old GPU. Current flagship consumer GPU will take a harder hit on low bandwidth PCIE.

New comment by mrheosuper in "MacBook Neo"

mrheosuper — Fri, 06 Mar 2026 08:55:09 +0000

Could it be all the corporate-tracking software ? I used to have a M1 Pro macbook with 16gb ram when it's first released, and somehow it still feel slow when compiling.

Then try again on my friend personal M1 MB, it was night and day.

New comment by mrheosuper in "MacBook Neo"

mrheosuper — Fri, 06 Mar 2026 08:51:15 +0000

Apple has history of giving inferior device newer update because it's released later.

Like the ipad pro 10.5 does not support later ios version, while the less powerful but newer base ipad does.

So, there is chance the M1 MBA stop receiving update before the MB Neo