Show HN: Try CLIP, OpenAI's new model, from the browser https://ift.tt/2P1hXl4

Show HN: Try CLIP, OpenAI's new model, from the browser https://ift.tt/3dDaG58 February 22, 2021 at 05:06PM

Show HN: A no-code billing platform, all under your own domain. https://ift.tt/2NvK6QD

Show HN: A no-code billing platform, all under your own domain. https://tillypay.com February 22, 2021 at 03:47PM

Show HN: Kraken Bitcoin Profit Calculator https://ift.tt/3dEUwbo

Show HN: Kraken Bitcoin Profit Calculator https://ift.tt/2McrYuw February 22, 2021 at 04:35PM

Launch HN: H3X (YC W21) – High power density electric aircraft motors https://ift.tt/3qERuaO

Launch HN: H3X (YC W21) – High power density electric aircraft motors Hey HN! I’m Jason, one of the co-founders at H3X ( https://www.h3x.tech ). We are building the lightest electric propulsion systems in the world. Our first product is a 250kW (330HP) integrated motor drive in a 18kg (40lb) package. It combines the electric motor, inverter, and gearbox into a single unit, resulting in an ultra-high-power density solution for electric aircraft (and other mass sensitive applications). In terms of electrification, we believe the aircraft industry is where automotive was ten years ago. There are many companies working on eVTOL and single-seaters, but very few are working on large commercial single-aisle electric aircraft such as a 737. This class of aircraft is absolutely critical to electrify as it accounts for the most passenger-miles [1] and is the biggest slice of the pie in terms of aviation emissions. Beyond the environmental impact, there are huge potential cost savings from both fuel (or lack thereof) and reduced maintenance for airlines. Aircraft are very mass sensitive so there are two main technology challenges that need to be solved to enable this class of electric aviation – (1) High energy density and efficient energy storage (batteries, hydrogen fuel cells, etc.) (2) Light, efficient, and high-power density electric propulsion systems (electric motors, power electronics, gearbox) There are many people working on (1) and great strides are being made [2][3]. We are focused on solving (2). A study done by the DOE determined that for a 737 to complete a five-hour flight, the propulsion system must be >12 kW/kg [4]. Today, best-in-class systems have a power density of 3-4 kW/kg. With our first product, we are targeting 13 kW/kg, making it an attractive solution for near-term Advanced Air Mobility (AAM) applications as well as an enabling technology for the aviation industry to enter the next stage of electrification. There are some cool things we are doing with the electromagnetics, power electronics, and the integration between the systems to get to the 13 kW/kg. There is not a single magic bullet, but rather a combination of multiple technological advances - 3D printed copper stator coils, high frequency SiC power electronics, and a synergistic cooling system to name a few. Our origins in electrification stem back to our college days where we built Formula-style electric racecars (s/o to Wisconsin Racing FSAE!). During year 1 of the program, we got so fed up with our COTS motors and inverters, we decided to go clean slate and build our own from the ground up the following year. Those were super happy fun times. Lots of dead IGBTs and all-nighters in the shop, but in the end, we got everything working and delivered! It was a true test of resilience and taught us how to GSD. Great preparation for starting a company. This led us to grad school and it became apparent during this time that the electric aircraft industry was a sleeping giant ready to be woken. We felt uniquely positioned to capitalize on this opportunity, so after about a year in industry, we left our full-time jobs and went all in. We’ve got a long road ahead - aviation is tough, there’s no denying that. In addition to the engineering challenges, there are also major certification barriers. However, CO2 is a serious problem and right now the major aviation players don’t have a compelling plan to meet the goals laid out in the Paris Agreement. Innovation needs to come from the outside and that’s what we’re doing at H3X. I’d love to hear your guys thoughts and would be happy to answer any questions you have. Sources: [1] https://ift.tt/2NrNzQc [2] https://ift.tt/2MjLy8o... [3] https://hypoint.com/ , https://ift.tt/3hRFbEC [4] ASCEND DE-FOA-0002238 February 22, 2021 at 03:11PM

Show HN: Magic Login – Passwordless login and transactional emails as a service https://ift.tt/3updGI8

Show HN: Magic Login – Passwordless login and transactional emails as a service https://magiclogin.net February 22, 2021 at 02:09PM

Show HN: DeKarmaHN, a Chrome extension to hide karma and more https://ift.tt/3btlNuB

Show HN: DeKarmaHN, a Chrome extension to hide karma and more https://ift.tt/3aDQ9vg February 22, 2021 at 04:23AM

Show HN: ProSudoku – Play Sudoku with Apple Pencil on iPad https://ift.tt/2Nw425X

Show HN: ProSudoku – Play Sudoku with Apple Pencil on iPad https://ift.tt/3pHkAVy February 22, 2021 at 02:58AM

Show HN: Building a Binary Counter https://ift.tt/3um45ll

Show HN: Building a Binary Counter https://ift.tt/3dB6FhI February 22, 2021 at 02:33AM

Show HN: Turn scripts into fine-tuned voices via Wiki markups https://ift.tt/3dAi4OQ

Show HN: Turn scripts into fine-tuned voices via Wiki markups https://ift.tt/2NGfFnG February 22, 2021 at 12:59AM

Show HN: A contact form that prunes spam https://ift.tt/2OVa1Sd

Show HN: A contact form that prunes spam https://powreach.com February 21, 2021 at 10:14PM

Show HN: Timelineify – Create Spotify playlists of an artist's full discography https://ift.tt/3qLv7R6

Show HN: Timelineify – Create Spotify playlists of an artist's full discography https://ift.tt/37BdFal February 21, 2021 at 07:43PM

Show HN: Book a table in any restaurant with voice AI and build your own app https://ift.tt/3aBMcat

Show HN: Book a table in any restaurant with voice AI and build your own app https://ift.tt/37AjswW February 21, 2021 at 07:24PM

Show HN: EnzymeUI – open-source Vue components library https://ift.tt/37vpfnx

Show HN: EnzymeUI – open-source Vue components library https://enzymeui.com/ February 21, 2021 at 07:28PM

Show HN: Ad Network for Sideprojects https://ift.tt/3btPMT9

Show HN: Ad Network for Sideprojects https://tinyads.io February 21, 2021 at 06:39PM

Show HN: Free speech Reddit clone (svelte) https://ift.tt/3ugBiie

Show HN: Free speech Reddit clone (svelte) https://ift.tt/37zAhYY February 21, 2021 at 04:26PM

Show HN: Mp3tag for Mac – universal tag editor now on the Mac https://ift.tt/3shjrWO

Show HN: Mp3tag for Mac – universal tag editor now on the Mac https://mp3tag.app February 21, 2021 at 04:24PM

Show HN: CompreFace is a free and open-source face recognition software https://ift.tt/37zTwS0

Show HN: CompreFace is a free and open-source face recognition software https://ift.tt/37zw4nT February 21, 2021 at 04:18PM

Show HN: Go-FrodoKEM a Practical quantum-secure key encapsulation in Go https://ift.tt/3kl6W9X

Show HN: Go-FrodoKEM a Practical quantum-secure key encapsulation in Go https://ift.tt/3duueZr February 21, 2021 at 12:09PM

Show HN: Python Wheel Obfuscator https://ift.tt/3sigR2r

Show HN: Python Wheel Obfuscator https://ift.tt/2NogzZ6 February 21, 2021 at 08:26AM

Show HN: Write plain SQL, generate Typescript types of result row and parameters https://ift.tt/3dxNzZH

Show HN: Write plain SQL, generate Typescript types of result row and parameters https://ift.tt/2ZCKAa4 February 21, 2021 at 07:16AM

Show HN: Force Directed Graph of Singapore MRT and LRT Networks https://ift.tt/3sbyoJK

Show HN: Force Directed Graph of Singapore MRT and LRT Networks https://ift.tt/3kaKAHK February 21, 2021 at 09:42AM

Show HN: Tape Machine https://ift.tt/3pCB5CA

Show HN: Tape Machine https://www.youtube.com/watch?v=XlQkZrrQx3U&feature=youtu.be February 21, 2021 at 04:08AM

Show HN: Jambook.io – A “don't break the chain” dashboard for GitHub writing https://ift.tt/37wUPRI

Show HN: Jambook.io – A “don't break the chain” dashboard for GitHub writing https://www.jambook.io/ February 21, 2021 at 12:40AM

Peppa Peg – An Ultra Lightweight Peg Parser in ANSI C https://ift.tt/2ZBEsPq

Peppa Peg – An Ultra Lightweight Peg Parser in ANSI C After reading the [PEG Parsers series] written by Guido van Rossum, I started thinking writing a PEG Parser in ANSI C. Here are the reasons: - It's FUN. I've made several parser libraries, such as JSON, Mustache, Markdown, and I think I can take the challenge now. - I haven't had any opportunity to work on an Open Source project written in ANSI C. - Having a PEG parser in ANSI C can benefit whoever is developing a parser, as adding C bindings for other programming languages are not too difficult. And after SIX months' development, my project is now kinda feature complete. It's named Peppa PEG and you can find it here: https://ift.tt/3aBmrqW I have learned quite a lot during the journey of creating it, such as gdb, valgrind, cmake, etc. And I wouldn't make it to the end without learning from some awesome projects, such as pest.rs, cJSON, etc. Appreciate any feedbacks! Thank you! [PEG Parsers series]: https://ift.tt/2M0QQTs February 21, 2021 at 03:10AM

Show HN: A GitHub issue that self-updates in realtime using GraphQL subscription https://ift.tt/3sieltj

Show HN: A GitHub issue that self-updates in realtime using GraphQL subscription https://ift.tt/2ZzSBwC February 20, 2021 at 09:22PM