MiracleRabbit

9 ms·

1.
by MiracleRabbit 3mo ago
It "looked good" for me up to 100Hz after Nyquist in the spectrum but didn't pull any precise data. Just created a 50Hz tone using my speakers which showed up in the spectrum afterwards as expected as basic verification Took
2.
by MiracleRabbit 3mo ago
Sadly you have to install the codecs from external sites. This - at least for me - messes up the rolling release stuff at least one a month.
3.
by MiracleRabbit 3mo ago
Honestly: don't know. My experiments never had a dependency on linearity.
4.
by MiracleRabbit 3mo ago
Theoretically wind can be Nulled with a 4-way water splitter that are placed in 90° angles (+ a connector at the bottom to the sensor). As long they are orthogonal the wind pressure coming from one side will cause a negative pressure on th
5.
by MiracleRabbit 3mo ago
The Sensirion SDP600-25Pa speaks I2C and only has a handful of primitive commands. Add this and 3.3V and you are done. I'm 99.5% sure if you throw Claude with a datasheet on it will Slop out working code for a ESP32 with ESP-IDF.
6.
by MiracleRabbit 3mo ago
Not much circuits needed. The SDP600-25Pa speaks I2C and only has a handful of commands. Just read it out with a microcontroller you love (like ESP32) and send the samples to a host for analysis. The ESP32 has limited I2C time stretching ca
7.
by MiracleRabbit 3mo ago
Yes. But they usually are not performing very good between 1-250Hz. Sensirion is using a thermal flow-sensing principle method which is basically a heated plate that cools/heats up when air passes it - making it extremely sensitive in
8.
by MiracleRabbit 3mo ago
If these Shahed drones have a propeller they should have a brutal signature between 0-250Hz as they are moving a lot of air. And if the engine speed of the Shahed stays constant it will be even easier to detect it ("Angry lawnmower sou
9.
by MiracleRabbit 3mo ago
They are getting better. After a long time they introduced ONVIF into their camera products which basically opened it to everyone.
10.
by MiracleRabbit 3mo ago
And screaming loud Keygen music
11.
by MiracleRabbit 3mo ago
Streisand effect Deepseek.v4.Pro.RePacked.LLMBoyz.part1.zstd
12.
by MiracleRabbit 3mo ago
I just wait until a Opensource model inhaled all the chemistry books and papers. Lol. They are following closely and the best offer 80-90% of the performance and come with a very small fraction of the costs.
13.
by MiracleRabbit 4mo ago
Freshly marinated in DEET
14.
by MiracleRabbit 4mo ago
With Wi-Fi 8 we will finally get steerable friendly roaming like cellular radio is doing for almost 40 years now. This "here's a neighbor table, disassoc and fuck you&good luck"-method we must use right now is just super
15.
by MiracleRabbit 4mo ago
For sensor stuff use LoRaWAN + Mirotik Basestation + Chirpstack
16.
by MiracleRabbit 4mo ago
All ham radio repeater groups here dropped Meshtastic as it was super unreliable. And they know how to build proper antennas and filters. Meshcore is 100% free. The last issue was the closed sorce Android/iPhone client - but there a
17.
by MiracleRabbit 4mo ago
With GNSS+PPS and a hardware timer latch you can easily sync internal microcontroller timers to 2 to 3-digits nanoseconds against the global standard with a tightly controlled loop. But cannot get better than the PPS signal itself (roughly
18.
by MiracleRabbit 4mo ago
The NICs need supported hardware timestamping. Then they can be used with ptp4l. Intel i210 and i226 does this. But the i226 has a few variants.
19.
by MiracleRabbit 4mo ago
Reminds me a bit of the research dept of the company I'm working for. If they have too much free time they put much weirdo stuff into their devices just to see what.. happens. They have a spectacular collection of crystals scanned.
20.
by MiracleRabbit 5mo ago
Interesting. In safety components we are using Lockstep Microcontrollers which are doing something similar in a much smaller scale. https://en.wikipedia.org/wiki/Lockstep_(computing) Example: https://www.st.
21.
by MiracleRabbit 5mo ago
Gitea Upgrading.. replacing binary, restarting. I love it. Same for Forgejo.
22.
by MiracleRabbit 5mo ago
> Wifi HaLow 802.11ah LoRa is another level. It works down to -146dBm. 802.11ah dies around -100dBm. Still much much better than "standard" Wifi. But you are comparing two different beasts.
23.
by MiracleRabbit 5mo ago
If you want to build sensor stuff you should have a look a LoRaWAN. Get a basestation from Mikrotik and use Chirpstack as backend. This setup is commercially very very battlefield proven.