xyx0826

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31.
by xyx0826 3y ago
Raspberry Pi’s original SoC is designed by Broadcom for the set-top box market. Subsequent SoCs up until Pi 4 are of the same architecture design but with the Arm cores swapped out and upgraded. https://raspberrypi.stackexchange.
32.
by xyx0826 3y ago
I’m not sure Ryzen Embedded is the answer to every SBC use case. Even the budget V3000 line comes with 2x 10 GbE, 20 lanes of PCIe and 8 cores. Does an elevator controller [0], e-scooter [1] or a kiosk need that much power? Doubtful. There
33.
by xyx0826 3y ago
I hate how it’s heavily marketed as a “challenge” and a “learning opportunity” when it’s a clear attempt to crowdsource for-profit IP geolocation data. There’s nothing challenging about running around collecting data for free, neither is th
34.
by xyx0826 3y ago
For those not in embedded: the SO (not S0) pin is commonly called MISO (Master In Slave Out) in a SPI bus; it is the pin on which the SPI device (SPI flash) sends data to the controller (ethernet bridge). The CS (Chip Select) pin of the dev
35.
by xyx0826 3y ago
Not a proxy but SoftEther VPN supports connection over DNS and/or ICMP. This is meant for circumventing firewalls. https://www.softether.org/1-features/1._Ultimate_Powerful_VP... !)
36.
by xyx0826 3y ago
Quite surprised to see UW materials on HN. I took the non-major equivalent of this course; it was an introduction to C, Bash, Linux, and assembly. It was quite helpful back then, although the web helped me expand on what I know as with most
37.
by xyx0826 3y ago
Reddit was archived by PushShift, which was killed along the API changes. Nevertheless the archives remained online. https://the-eye.eu/redarcs/
38.
by xyx0826 3y ago
Real time data is fed into an InfluxDB instance and shown on Grafana hosted on the ground station. This data is downsampled to cope with the volume of raw traffic. We also tried some solutions used by other teams like KX [0] but decided to
39.
by xyx0826 3y ago
Sadly my team is pretty light on public tech blogs, but there are plenty of projects like this one! Copying from my comment above: > The system is for a Formula SAE (FSAE) Electric style race car. FSAE is a collegiate competition, and I&
40.
by xyx0826 3y ago
The system is for a Formula SAE (FSAE) Electric style race car. FSAE is a collegiate competition, and I'm part of a US Pacific Northwest team. Our car uses a 550 V battery and is 4WD. Most of our electronics and firmware/software
41.
by xyx0826 3y ago
There are a lot of SQLite praises in this thread, on the internet and on SQLite's website so here are a couple of reasons that drove me to choose it. My experience with traditional formats like CSV or raw binary is that they have a som
42.
by xyx0826 3y ago
All that and more! Sensors like shock potentiometers, strain gauges, temperatures from all over the car, IMU readings ([ag][xyz]), and electrical measurements like HV/LV voltage, current, power, energy, as well as controls like motor c
43.
by xyx0826 3y ago
Precisely so! There are two CAN buses and one UART port to log from, and the Python code spawns subprocesses for each of them. They each create or open a SQLite database named after their bus/port and get to work. This setup is easy to
44.
by xyx0826 3y ago
I'm not familiar with HDF5 but agree on resiliency. We are a collegiate racing team and our car's power rails aren't stable and redundant at all times, so power loss failure is something I've kept in mind from day one on
45.
by xyx0826 3y ago
The onboard code processes binary data: CAN bus messages and alike, along with their nonbinary metadata. The first version of the code used CSV because they are so trivial to read and write, but CSV as a text format required me to either he
46.
by xyx0826 3y ago
I extensively used SQLite in a telemetry system for an electric race car. The car has an onboard computer, first a Raspberry Pi then a dual core Arm processor. Onboard code logs ~4000 messages a second into three SQLite databases. After a d
47.
by xyx0826 3y ago
Hardware Design with RP2040 [0]. An official guide on integrating the Raspberry Pi RP2040 microcontroller into one’s own circuit design. Essentially a series of worked examples that touch on pretty much every hardware feature of the chip, w
48.
by xyx0826 4y ago
Very interesting to hear about CircuitPython being used in the industry. I had thought it’s largely a hobbyist/ prototyping framework much like its upstream MicroPython. Out of curiosity, does your team implement all logics and math in
49.
by xyx0826 4y ago
The chickens died from heatstroke due to ventilation computer malfunctioning. They weren’t actually “boiled” alive, i.e. in water. So there was an alarm for barn temperature but not for the ventilation system itself? I can’t think of any in
50.
by xyx0826 5y ago
An attacker gained administrator access to the forum in question. The admin changed passwords and continued to observe more password bruteforcing attempts from the attacker. The attempts were made to the forum's mobile login endpoint u
51.
by xyx0826 5y ago
> Having your power connector come loose on a vibrating machine or having your SD card die is a serious problem when you're trying to use a machine to make money reliably and consistently. Hah, I’d never thought of the power connect
52.
by xyx0826 5y ago
Raspberry Pis have commercial and industrial use cases so they can have pretty good reliability. There’s an official “for industry” page [1], and there are PLC products made with the Pi [2]. I’m curious on why do you think the Pi (including
53.
by xyx0826 5y ago
Shucking means removing the HDDs from the enclosure to use them on PCs or servers. Un-shockable enclosures might have HDDs with proprietary electrical connection which makes standalone usage impossible.
54.
by xyx0826 5y ago
Given that the Tempo codec works great as a feature parity replacement (which the Framework team anticipates), it’s quite likely they will stick with it. The Tempo do lack the ALC’s smart features but they couldn’t get the latter to work an
55.
by xyx0826 5y ago
TL;DR: Framework is switching its audio codec from Realtek ALC295 to Tempo 92HD95B. While I don’t own a Framework I welcome this change and find it quite interesting, partly because it seems like every laptop and PC maker these days are put