5ADBEEF | 8 months ago | on: Nordic Semiconductor Acquires Memfault
I don’t think most have this experience. Zephyr is the future.
5ADBEEF's comments
5ADBEEF | 9 months ago | on: How to Build a Smartwatch: Picking a Chip
Zephyr provides an open source implementation of all layers of the BLE stack. The radios of some devices are documented extensively, Nordic nRF5 devices are probably the best example.
The Bluetooth SIG requires that you qualify your device if you advertise that you use Bluetooth IP, similar to what is required for the cellular space. Do you have to do this if you’re just “Bluetooth compatible?” Maybe not. Whatever the case you have to conduct FCC part 15C testing (intentional radiator).
5ADBEEF | 1 year ago | on: Updates to H-1B
the average defense job is the exact opposite of fulfilling and meaningful
5ADBEEF | 1 year ago | on: How can this 6 axis robot have a static accuracy of 0.05 mm? (2021) [video]
Be aware, per erratum 9, that you’ll need to include external pull-downs instead of using the internal ones
5ADBEEF | 1 year ago | on: Show HN: iFixit created a new USB-C, repairable soldering system
Anybody notice that the example for their shell is using the Zephyr shell subsystem? Very cool that it's using Zephyr!
5ADBEEF | 1 year ago | on: Moving to a RTOS on the RP2040
anybody doing new BLE products has a 50/50 shot of using Zephyr in current year. I think the real benefit of Zephyr is that the wheel has already been invented, no need to do it yourself
5ADBEEF | 1 year ago | on: Moving to a RTOS on the RP2040
the pi pico is 100% supported in Zephyr. https://github.com/zephyrproject-rtos/zephyr/tree/main/board... Did the author not check the docs? https://docs.zephyrproject.org/latest/boards/raspberrypi/rpi...
Additionally, you aren't intended (for many situations) to use a single "main" Zephyr install, but to include what external modules you need in your project's west.yml. If you have a number of projects sharing the same Zephyr install that's a separate discussion but installing every possible toolchain/HAL is not the only way to do things.
5ADBEEF | 1 year ago | on: Adding a USB port to the ThinkPad X1 Nano (the hard way)
RF dongles almost always are Nordic Semiconductor parts and they use their proprietary (but open) protocol called Enhanced Shockburst. The minimum latency of BLE is 7.5ms (fastest connection interval in the spec) while ESB can be in the 100s of microseconds. Not sure about power savings but latency is better.
5ADBEEF | 1 year ago | on: Voyager 1 Resumes Sending Science Data
5ADBEEF | 1 year ago | on: BreadboardOS firmware for the Raspberry Pi RP2040 features a Linux-like terminal
Zephyr would also be well suited for something like this. Anyone aware of any projects that do something similar with Zephyr?
5ADBEEF | 1 year ago | on: Why do CPUs have multiple cache levels? (2016)
I am not certain that this provides a lot of benefit. Worth discussion. Feels like most engineers just copy the application circuit nowadays though.
https://www.signalintegrityjournal.com/articles/1589-the-myt...
5ADBEEF | 1 year ago | on: DECT NR+: A technical dive into non-cellular 5G
This is what Wirepas is doing with their mesh network. They have a DECT version coming soon
5ADBEEF | 1 year ago | on: DECT NR+: A technical dive into non-cellular 5G
Not an unauthenticated mesh. This will be up user implementation iirc
5ADBEEF | 2 years ago | on: Thieves using cellular and Wi-Fi jammers to enter homes for robbery
Best option is PoE and battery back up (if they elect to pull the meter)? I guess they could also cut your cable. Or forget all of that and get a nice pup
5ADBEEF | 2 years ago | on: Ask HN: Best open source and/or free EDA tooling
the crustier EEs among us have been burned by downloaded symbols. It’s often better to make your own symbols and footprints unless you have a high quality source from the manufacturer. Even then, some symbols are not organized in a logical way. I personally make all symbols/footprints not in the kicad standard library.
5ADBEEF | 2 years ago | on: Anti-aging drug for dogs moves closer to gaining FDA approval
Why just accept that time passes?
5ADBEEF | 2 years ago | on: Ask HN: What other good forums are out there?
If you’re into electronics and can sweep aside some crusty EE opinions, the EEvblog forums are quite fun and informative.
5ADBEEF | 2 years ago | on: Factory construction boom in the US
I warn you that much of controls is very very boring. PLCs w/ ladder logic in most places. Embedded devs have better devex than controls engineers…
5ADBEEF | 2 years ago | on: Salad Fingers and the dawn of ‘weird YouTube’
I’ve watched all of the skibidi toilet episodes. It’s really the same as 2000s or 2010s gmod YouTube poop, it just managed to find a larger audience.
5ADBEEF | 2 years ago | on: I will always prefer to work from home
Juniors are hyper-online, accustomed to COVID classes etc. Maybe it is methods of training that need to shift.
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