roger_

10 ms·

121.
by roger_ 2y ago
You can also use a single ESP and your WiFi AP as a source of packets.
122.
by roger_ 2y ago
Only skimmed this but didn’t see any mention of tracking, which is the only way (?) to get the true velocity when there’s non-radial motion.
123.
by roger_ 2y ago
Do you mean the tangent space of SO(2) as a state?
124.
by roger_ 2y ago
In this case they're both in series AND parallel, since it's just two components.
125.
Two Capacitor Paradox(en.wikipedia.org)
3 points by roger_ 2y ago|3 comments
126.
by roger_ 2y ago
Been looking for something like this for ages — great job! Would be nice to see a category for electrical engineering. Things like digital/statistical signal processing, electronics, RF, etc. that don’t always fit into math/ CS.
127.
by roger_ 2y ago
I think it’s a question of timescale. Twitter, etc.: hours - days Now page: months - years About page: decades
128.
by roger_ 2y ago
Sounds like this: https://en.m.wikipedia.org/wiki/Inverse_distance_weighting
129.
by roger_ 3y ago
Maybe be true: https://en.m.wikipedia.org/wiki/Spondulix
130.
by roger_ 3y ago
As someone with two cable modems sitting around gathering dust, this piqued my interest. Looks like this project never really took off though.
131.
by roger_ 3y ago
Have several cameras that may be compatible but the lack of a clear installation guide and a community has always bothered me about this project.
132.
by roger_ 3y ago
Well written piece, like that they walk through the problem formulation starting with the basics. BTW is there a hackernews-type site or other aggregator that’s nothing but content like this? Maybe a subreddit? I’d love to read a few articl
133.
by roger_ 3y ago
Pretty hideous IYAM. optional.py seems to address the same issue and with a slightly better approach (but still ugly). https://github.com/Python-Optional/optional.py
134.
by roger_ 3y ago
Love the Python syntax so I’m tempted to try this, but I wish it incorporated some of the ideas in nushell (e.g. structured data).
135.
by roger_ 3y ago
No ARM support?
136.
by roger_ 3y ago
FYI: Half-Life is currently free on Steam: https://store.steampowered.com/app/70/HalfLife/
137.
by roger_ 3y ago
Loved the singing piranha plants, but have to give credit to Rayman Legends who did something similar 12 years ago.
138.
by roger_ 3y ago
The new `type` statement with lazy evaluation looks interesting. Wonder if it could be used to add lazy evaluation to other libraries, like numpy?
139.
by roger_ 3y ago
collectd + minimal plugins would still be 100+ kB installed on OpenWrt. Plus I'd have to write a solution to get the data into Home Assistant.
140.
by roger_ 3y ago
I wanted something that would run anywhere with no dependencies. This might work on OpenWrt, but would be trickier to setup on Debian.
141.
by roger_ 3y ago
It requires Perl, which ruled out OpenWrt devices with ~10 Kb of space.
142.
by roger_ 3y ago
I was recently looking for an ultra minimal monitoring solution for OpenWrt and other lightweight systems (Pi’s, etc.) and was disappointed not to find one that met my needs (negligible CPU, disk space and RAM). I ended up hacking together
143.
by roger_ 3y ago
The new base Pro Max is the same price as the equivalent previous model: https://www.macrumors.com/2023/09/12/iphone-15-pro-pricing/ They basically eliminated the lower 128GB model.
144.
by roger_ 3y ago
SymPy is pretty nice but every time I use it for a real problem I end up hitting a wall and have to dig through the source or look at old issue reports for a workaround. Most recently I wanted to simplify a complex expression with terms l
145.
by roger_ 3y ago
Where could one find high resolution photos of these?
146.
by roger_ 4y ago
Looks like you can skip the logger and get a cheap rtlsdr to log data wirelessly (using e.g. https://github.com/bemasher/rtldavis ). A cheaper still route would be to grab the outdoor sensors for a weather station suppo
147.
by roger_ 4y ago
Also the need for periodic outdoor calibration.
148.
by roger_ 4y ago
Do you have a reference on the PMS5003 being better? Any thoughts on Plantower's newer sensors (e.g. PMS9003)?
149.
by roger_ 4y ago
Good exercise but FYI ESPHome is probably the way to go for most people. All the sensors you mentioned are likely already supported and just need to be added to a yaml file.
150.
by roger_ 4y ago
I'd expect BPF behavior when estimating the rate of a noisy input (e.g. state: speed, observation: position), but I can't think of a process model that would be truly high-pass.

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