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MaxFalcor
u/MaxFalcor
Hi all,
I’ve mounted a 9DOF ICM20948 IMU (Adafruit) onto the back of my bike, sampling at around 200 Hz. My goal is to estimate the road slope (pitch angle) to within about 1°.
Here’s my current approach:
- Raw data → fed into a Mahony MARG filter to obtain quaternions
- From quaternions → compute pitch
- Post processing via smoothing and low pass filters.
I've tried to tune the Mahony filter by reducing Kp to reduce any oscillations. I've also done post-processing like smoothing (median/moving average) and applied low-pass filters (Butterworth). However when the bike is being ridden, the signal is very noisy. I don’t get a stable or repeatable slope angle, even after filtering.
Th
1117
Was given 3 boxes of coffee capsules, but I don't own a coffee machine...
Was wondering if there was any way to use them to make coffee without a coffee machine. My family has a Mokka Pot (relative bought us the capsules by mistake). It also doesn't make sense to buy a coffee machine just to use 30 capsules.
Or on a stupid note, is it possible that there are coworking spaces that have a free coffee machine which I can use my own capsules?
I suppose if all else fails I might try to sell it on carousel for cheap...
29
From what I know, chatgpt is a language model, meaning that its weights are already set in stone, so its not actually learning when speaking with us (? correct me if Im wrong). So if I get a good answer from it and compliment its answer, is it actually doing anything?
It seems to be remembering its responses/questions, so is my compliment a form of reinforcement learning? Since I am giving it a reward for a task with no supervised answer.
15
Hey! This isn't exactly related to obsidian, but I was wondering if anyone knows of an application similar to obsidian for images.
I use obsidian everyday and I love the philosophy of being able to store data myself. Similarly for images, I was wondering if there is a photo album-like application that parses images of a local storage or hard disk. That way I could filter through all images by date, location that is attached to an image etc.
Its abit like google photos(?) but I would prefer to store data locally, rather than be forced to pay a yearly subscription fee.
148
Has anyone ever faced the issue of not being able to claim the daily alliance reward? Everytime I log in, the alliance reward page says "pending" even though I haven't claimed it for the day. It started a few days ago.
44
Hi! Just putting it out here incase anyone is interested now or in the future.
I play roundnet with a community in Singapore every week. It small and we're really trying to grow this community. If you live in Singapore and would love to play regularly do let me know :). There's a variety of skill levels ranging from people who are just starting out to more advanced players who play with the no hit zone. In fact my partner and I are looking to travel to Hong Kong to play in the ARF tourney this year!
Also, if you're a foreigner in Singapore for a while, feel free to PM me or comment on this post, and I'll be really happy to play with you when you come.
10
According to the ESP-IDF build system documentation, Cmake should search in PROJECT_DIR/components for libraries. However, I have tried creating components in that folder, or have used idf.py create-component [NAME] but when I call idf.py build, I get a fatal error - No such file or directory.
Its quite strange,
217
I'm designing a 4 layer board with WS2812s acting as 7 segment digits. I plan to get this manufactured in China. Attached below are the schematic and layout. Some features include
- LSM6DSOX IMU and PCF8523 RTC
- Buck converter for power hungry WS2812 and oled breakout
- Mosfet Driven Piezzo Buzzer
- Mosfet Switching circuit to switching between USB 5V and Battery Power
I have some doubts on whether the buck converter will work. I have followed the recommended layout and did the inductor calculations. I would also like to know if I can improve my schematic and layout in any way, as the traces seem abit messy at times, as I need to use quite a few vias. Thank you!
Schematic
41
Hi everyone, this is my first time designing a very low level schematic (smd/smt instead of breakout boards) and was hoping to get a review of my schematic before i started to do layout. Some of my concerns/questions would be:
- Is the filtering enough? I am using 29 WS2812B-2020 LEDs as the digits in the alarm clock, and decided to route them through a switching converter. However, this causes some noise. I put a 100nF cap before the LDO, but im not sure if its needed or enough
- In page 4, I used a piezo buzzer, with the goal of it being an alarm. I added some breakout test points for me to modify the resistance with a pot if needed, and am using a large size resistor R402 that can easi
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Hello, Ive been running through the Nordic Dev Academy tutorials, trying to understand the SDK and how Zephyr works and run the NRF52840 dev kit. I was wondering if there were open source libraries that could be used to interact with any sensos? Or do I have to manually read the datasheet, implement the SPI/I2C myself to get the readings?
I come from a background of using Arduino IDE to code my controllers, and there are many libraries that could be used to interact with sensors. Would something like this exist in Zephyr? How could I go about importing them?
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