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Ask HN: What is your hardware/garage side-project?

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Re: Ask HN: What is your hardware/garage side-project?

#71

Post by brettanomyces »

VLM wrote: post #49
kejaed wrote: post #37

Earlier quoted context omitted.

My buddy has something going along the same lines but is using temp sensors to detect a pint being pulled: https://mobile.twitter.com/toms_beer_keg/status/799323771043...

Two other non-contact methods I've seen are direct mass measurement (probably ebay the scales, it'll be like $500 new) or the most innovative thing I've seen is flow rate meters watching the CO2 source. See you can measure flow rate of the beer but that can get weird with bubble formation and sterilization but CO2 is clean and biologically boring and single phase. You can buy a flow rate meter with digital output for…

Measuring the co2 flow rate is an idea I hadn't considered! I only want to know when beer is being poured and not actually how much has been poured so measuring co2 may be a bit simpler for cleaning and actually wiring up too (although the wiring issue is specific to my setup)

Re: Ask HN: What is your hardware/garage side-project?

#72

Post by brettanomyces »

Qworg wrote: post #34
brettanomyces wrote: post #24

I'm adding flow meters to my keggerator so I can detect when someone pours themselves a beer from one of the taps. The plan is to have a camera take a photo, do some facial recognition to see if its either one of my flatmates or myself, then optionally post the pic to #beertheif on twitter or start playing some music based on the chosen beer.

Are you building your own flow meters? That's a fun project in magnets/magnetometers.

I've been looking at which flow meters to get but as deutronium says swissflow meters are quite expensive, however at the same time I don't really trust cheap meters to be in contact with my beer. Making them myself might be a good project!

Re: Ask HN: What is your hardware/garage side-project?

#73

Post by snarfy »

snarfy wrote: post #30

deltabot - https://www.youtube.com/watch?v=cbNiJKSRCpA digital theramin - https://www.youtube.com/watch?v=bZxVEUxaw1w 3d printer - https://www.youtube.com/watch?v=QFOR1YPwFMM stacked focus camera rig - https://www.youtube.com/watch?v=6ovWjnzBGUw

more stacked focus rig - http://imgur.com/a/SMLx9

more deltabot - http://imgur.com/a/05G1L

more theramin - http://imgur.com/a/lvLE4

slayer exciter - http://imgur.com/a/5Rwtm

mame cabinet - http://imgur.com/a/hzE1x

polywell - http://imgur.com/a/Tsg40

Re: Ask HN: What is your hardware/garage side-project?

#74

Post by kbob »

Minimum Viable Synth. https://github.com/kbob/MinimumViableSynth

Today's progress was (a) receiving my SMD rework station from Amazon, (b) continuing to wait for OSH Park to send PCBs, (c) writing graphics primitives for the LCD display (which I can't see until I make the PCBs).

Re: Ask HN: What is your hardware/garage side-project?

#75

Post by whataretensors »

infinitone wrote: post #61
whataretensors wrote: post #41

I've been working on my generative adversarial network. It's a fascinating type of ML that can learn from both supervised and unsupervised data. In essence, given data it will create a generator of that data. Right now my datasets are mostly images. I have tried on audio data and that does start to work - then diverges. I'm still trying to find a configuration that works really well: https://github.com/255bits/hyperg…

This is really interesting. How much data does it require to build a generative model with say 60% accuracy for story type data?

GANs work on real-valued data. The problem with sequence data, like text, is that the error gradient can't flow through the generator.

There's some really great work being done called "Sequence GAN" that turns sequence generation into a RL problem. I'm not sure how successful they are, but it seems potentially powerful. https://arxiv.org/abs/1609.05473

Re: Ask HN: What is your hardware/garage side-project?

#77

Post by skanga »

colorcoded wrote: post #28
skanga wrote: post #26

A Flying Car. Anyone with CAD, CFD, aerodynamics skills wanna help?

Ambitious! What kind of propulsion system will it have? How far did you get at this point? Where are you based?

Electric propulsion. I have some very promising aero designs that I hope to get into a (virtual) wind tunnel. Bay area.

Re: Ask HN: What is your hardware/garage side-project?

#78

Post by skanga »

ohstopitu wrote: post #46
skanga wrote: post #26

A Flying Car. Anyone with CAD, CFD, aerodynamics skills wanna help?

me and my friend are working on something similar. We prefer to call it a drone though :$ My friend was looking into the material strength and feasibility while I was looking into the software. We intend to use a 3d printer to build a small scale model and progressively keep making it bigger. We would love to collaborate if that's ok with you. Based in Canada (Toronto) and we put ~10 hrs/week max on this project.

Sounds good to me - call it what you like. Perhaps we can start a conversation. I'm skanga at google's email thingy.

Re: Ask HN: What is your hardware/garage side-project?

#79

Post by skanga »

ohstopitu wrote: post #67
jimnotgym wrote: post #66

Earlier quoted context omitted.

The only person I ever saw get a human off the ground was this guy https://www.youtube.com/watch?v=soxxPyaAT1k and several build vids. He would have really benefited with some fly by wire help

that + [0] + [1] inspired us to get started... [0] - https://www.youtube.com/watch?v=0Yn2uyQJ1jc [1] - https://www.youtube.com/watch?v=PAdCt6qgj9k

Terrafugia is awesome. They have tremendous respect from me.

But I dislike any type of folding wings. They will need to make a massively strong hinge/joint for this type of machine since the entire car hangs off that hinge. This makes is heavy, inefficient, painful to maintain, vulnerable in fender benders, etc, etc.

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