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Ask HN: What do you do with your Raspberry Pi?

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Re: Ask HN: What do you do with your Raspberry Pi?

#681
post #615

With my 16 year old son, I built a weather balloon with one, including an Arduino, a few temperature sensors, a GPS, LoRA radio, and we're going to launch it next month. Having a hard time finding Helium.

As a further science project, why not liberate hydrogen through electrolysis? Much less expensive than helium, and greater lifting capacity...

Re: Ask HN: What do you do with your Raspberry Pi?

#682
Video playing through Kodi and nothing else. Nearly all other "competing" boards are either cheaper or more powerful or both, and more open, but the PI has the best CEC imlementation along with good video acceleration which makes it ideal for the task. The freshly announced PI4 seems a step in the right direction price and performance wise, although I don't expect the Pi Foundation (aka Broadcom) to solve the openness problem anytime soon, so although it could soon become my main video player I won't consider it for anything else, especially if security related.

Re: Ask HN: What do you do with your Raspberry Pi?

#683

Earlier quoted context omitted.

You could automate this even more with a Twilio number, ngrok running on the Pi and a small webserver to trigger the audio playback. Then instead of having to ssh in you can just send a text.

Is ngrok the new dnat?

http://serveo.net/

Re: Ask HN: What do you do with your Raspberry Pi?

#684

There's a bus station across from my studio / coworking space. I can see people waiting for the bus and doing either: 1) staring into the void 2) looking at their watches 3) desperately glancing in the direction where the bus is coming from. I figured that it'd be nice to let people know when the bus is supposed to be there. So, I installed a 28" display on a monitor stand, installed the stand on my window frame, tur…

Big ups! I use this all the time in winter while waiting for the 55. I definitely assumed you worked at Ubisoft across the street! Btw, from some experience spending cold winters looking at it, it flickers a lot by having so many screen changes, making it tiring to see the screen change so much. L'AUTOBUS - SERA - LA - DANS - 5... - MINUTES - GREG . - TECHNOLOGY. It would be easier on the eyes if it changed less ofte…

Ha, small world :-)

Agreed on timing, it could be better. I'll consider skipping some of the words + make them appear slower. Thanks for the suggestion!

Re: Ask HN: What do you do with your Raspberry Pi?

#685
When reading specs of the new raspberry pi I decided I will buy two in the near future to serve as a desktop for my girls. I still have a raspberry pi 1b with 512mb. I was too soon and missed the free upgrade. Tried it once as media server. Was not impressed. After that I bought a pine64 with 2Gb ram that runs my bookmarks web application I personally use every day. Also bought the hardkernel mc1 cluster to play with. Still the support for raspberry pi is unbeatable.

Re: Ask HN: What do you do with your Raspberry Pi?

#686

There's a bus station across from my studio / coworking space. I can see people waiting for the bus and doing either: 1) staring into the void 2) looking at their watches 3) desperately glancing in the direction where the bus is coming from. I figured that it'd be nice to let people know when the bus is supposed to be there. So, I installed a 28" display on a monitor stand, installed the stand on my window frame, tur…

Awesome! This has reminded me of an old Heroku app that has been sitting idle for years: https://wmata-status.herokuapp.com (before the Silver line, which is why the UI is all wonked now) I wanted to do something similar to try and reinvent the old/ugly/hard-to-parse televisions scattered around the DC metro.

Lovely UI, congrats!! You should definitely consider doing a 'gonzo' TV install somewhere in the city where you have access to power, wifi and shelter.

Re: Ask HN: What do you do with your Raspberry Pi?

#687
post #550

Earlier quoted context omitted.

I'm thinking of doing the same for my kid. Any photos/description?

It's actually quite a bit louder than this now. Also, the lights aren't quite as infant-retina-searingly-bright as the camera would have you believe. https://www.youtube.com/watch?v=xtE8oE9GOsM Currently it's still running my test code, which just lets him mess with volume/pan/pitch. I need to get around to writing something a bit fancier. Tech deets: It's just a RPi3 with most of the stuff written in Python. I tried…

He really does love it. Amazing! Hahaha

Re: Ask HN: What do you do with your Raspberry Pi?

#690
I'm using an RPi as the main compute module for an Autonomous Radio Controlled Car. It's similar to a Donkey Car, but not using ROS (at the moment). Project is documented here: https://medium.com/@mikkelwilson/autonomous-rc-car-part-0-6e... (This is not a commercial project; just for fun)

I'm very interested to see how OpenCV 4 and YOLOv3 object detection will run on the new RPi. At the current trajectory I will have to upgrade to a Jetson Nano to get hardware acceleration (CUDA), but resorting to specialty hardware seems like cheating.

They also make a great prototyping platform for IoT projects. I've built 802.11.4 (Zigbee) mesh radio networks for passing small messages across neighborhood distances.

Previously I used an RPi to run an Airplay Bridge to my Sonos speakers. This has since been supplanted by AirPlay 2, which Sonos supports.

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