markrages

10 ms·

61.
by markrages 4y ago
Oven-stabilized crystal oscillators are a time-honored technique for precision electronics. It turns out that no matter how carefully you stabilize a circuit for temperature changes, it gets much more stable when held at a controlled temper
62.
by markrages 4y ago
The modified version is saying that ChatGPT is the non-native speaker, not the original poster. It is a different meaning. It is probably wrong too. ChatGPT is a native English speaker as far as I can tell.
63.
by markrages 4y ago
The complaints in the linked thread are not about reliability, performance or homologation.
64.
by markrages 4y ago
More thoughts: - The indicator is ratiometric and the exact supply voltage doesn't matter. If it works acceptably well down at the +5 V USB bus voltage, the circuit would get a lot simpler. - I suspect that driving the circuit with a
65.
by markrages 4y ago
Anyone following this as a guide: The calculations about potentiometer current are incomplete, although the selected part appears to be fine for this application. The current in all three potentiometer terminals is limited to 25 mA. The ter
66.
by markrages 4y ago
Much steam heat is sized for open windows. https://www.bloomberg.com/news/articles/2020-08-05/the-curio...
67.
by markrages 4y ago
Sometimes I get the feeling that many developers are functionally illiterate. (In the https://quoteinvestigator.com/2012/12/11/cannot-read/ sense.) I can spend as much time as I like writing comments or
68.
by markrages 4y ago
I've noticed that for years in embedded (where we use "Intel HEX" formatted files) but I ascribed it to a field full of eccentric loners doing idiosyncratic things, or some kind of DOS 8.3 brain damage.
69.
by markrages 4y ago
Those are advanced topics and you can look them up if you need them. Generally, Python does the right thing by default for scripting use: line buffered, system encoding, EOF handled naturally by the iterator protocol.
70.
by markrages 4y ago
It's in the name - a copy of Matlab's procedural API. So matplotlib is popular because they copied Matlab's original mistake. (The procedural / global state API is actually reasonable for interactive plotting from a REP
71.
by markrages 4y ago
Threads and naming things, two famously easy problems.
72.
by markrages 4y ago
https://en.m.wikipedia.org/wiki/Stairway_to_Heaven
73.
by markrages 4y ago
Cycle counting is dead for ARM chips with their wait states and instruction pipelines and lazy stacking. Works great for PICs though.
74.
by markrages 4y ago
The "standard" motor control setup for FOC is to do the ADC measurement synchronously with the PWM, to sample the current while the low-side switch is closed. Then the flux angles and voltages are computed immediately afterwards,
75.
by markrages 4y ago
"Verbing weirds language."
76.
by markrages 4y ago
I wrote a tool to do this for circuit board artwork changes. It used gerbv to rasterize the vector (gerber) files, then used XOR on the pixels to make unchanged areas disappear. For such a simple tool it is quite useful.
77.
by markrages 4y ago
A good excuse to be cranky in the morning is worth the price of addiction.
78.
by markrages 4y ago
Or shooting a man in Reno, just to watch him die.
79.
by markrages 4y ago
In my system it is called "librecad". I guess qcad is non-free somehow.
80.
by markrages 4y ago
> This might be useful for directors+ but is really a waste of the time of 50-100 other people. This is a problem with status meetings too; A status meeting serves to reinforce the social status of the one who called the meeting. No oth
81.
by markrages 4y ago
That was the era of the elecroluminescent backlight. This technology required a high-voltage (~100V) squarewave across the mostly-capacitive EL panel. This squarewave was at audio frequencies. The panel also happened to function as a piezo
82.
by markrages 5y ago
After about the fourteenth time I accidentally blew my timing and size budgets with double-precision softfloat routines, I learned of -Werror=double-promotion.
83.
by markrages 5y ago
I just submitted "The many myths of Paleo sleeping" https://news.ycombinator.com/item?id=29902569 (0 comments), on its way to total obscurity.
84.
The Many Myths of Paleo Sleeping(theatlantic.com)
29 points by markrages 5y ago|0 comments
85.
by markrages 5y ago
That's alignment, not indentation. Alignment should always be done by spaces.
86.
by markrages 5y ago
A decent editor supports smart tabs
87.
by markrages 5y ago
Finally!
88.
by markrages 5y ago
> It is now official. Netcraft has confirmed: BSD is dying One more crippling bombshell hit the already beleaguered BSD community when IDC confirmed that *BSD market share has dropped yet again, now down to less than a fraction of 1 pe
89.
by markrages 5y ago
cdrecord first induced me to try Linux in 1997. I had spent $400 on the Sony 2x CD burner with the caddy but Windows wasn't stable enough to reliably burn a disc. cdrecord was free and worth changing operating systems for.
90.
by markrages 5y ago
Just wait until you get a sheared pin on the distributor drive... Compression, fuel, spark, no go.

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