Ask HN: What are you working on?

Remember, the exposure has to be short due to motion blur.

Concepts of resonant rotating camera heads that use torsion springs and electronically controlled clutches with a torsion oscillator that advances the camera in a few milliseconds were made, but apart from an ability to capture ~1 Gpixel effective 360° data in 2 seconds (there is overlap due to covering the sphere with rectangles and not changing the horizontal number of images per revolution (oscillation frequency) to reduce overlap at nadir and zenit), the benefits were considered insufficient to warrant more time on it before I actually _have_ the camera. And I'll probably have an fpga that is too bulky to oscillate with it, so I need fatigue-resistant cabling for the 64 + 2 clocks high-speed LVDS lanes between them.

You can get e.g. the Blackmagic pocket cinema 4k that writes 30fps DCI4k DNG with an electronic global shutter to an USB-C SSD.

I have no plans to rely on magnetic field sensors or GNSS. I plan to fuse bundle adjustment with constraints from the raw sensor data. Offset and drift correction for both will be done there, and thus I don't get the typical drift-off issues from cumulating a sensor offset.

I _do_ plan to allow fixing feature markers in space, to handle geo-referencing and potential un-curling at the same time. (Depending on lens distortion you get variously strong tendencies for the area you scan to either reconstruct as a small hollow earth or a small spherical earth (in both cases the average surface curvature radius is up to a few km at most, often even less).)

Ever been to a bar where the music was too loud?

Wallfly is cruise control for sound. The sonic control system measures the ambient audio levels in every room using your device's microphone or Wallfly Sonic Sensor (coming Q4 2019) and modulates amplifier gain to keep the levels just right...because you can't tell someone you love them when they can't hear you.

https://wallfly.app

I'm building an IOS app that uses your food photos to create a social food diary, which when aggregated with posts from your friends, also creates this communal food brain of legit food. I call it friend-sourcing instead of crowd-sourcing.

An example use case is going to Tokyo and trying a bunch of ramen places. You take photos and upload the ones you like onto a geotagged list (called Tokyo Trip).

Your friends are going to Tokyo soon and ask you for ramen recommendations. Instead of creating a google map with pins or a long email lists with no pictures or geo-capabilities, you show/send them the list with the app and it will show them all your ramen photos on a map.

We want to help answer "What is the closest legit food my friends have tried around me?" wherever you are.

We are looking for beta test users and will be launching this year. You just have to love food and like telling your friends where they should go eat (like me). Feel free to reach out at weizou@legitlist.me

Here is the beta test link if anyone is interested: https://testflight.apple.com/join/3Ho5creV

At the moment it's just an application to create some reusable templates and snippets, and extend and share them with colleagues. My next step would be to create a browser extension that allows to easily injected the content from the application into other websites directly while typing (for example into any web email client, google docs, any website form, etc.).

The main benefits of the application would be to save time, reduce errors, and potentially to standardize a company's business communication thought a collective effort (document, template and snippet creation) where also employees that generally don't like to write emails can benefit (as a developer I find myself in this category).

Still in alpha, feedback is greatly appreciated: https://getlimpid.com