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Ask HN: What did you make during lockdown?

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321–330 of 556 posts

Re: Ask HN: What did you make during lockdown?

#322

I made an automatic chess board that allows you to play with another person over the Internet (using lichess), but with a physical board. It has been described as "very lockdown chic". Each chess piece has a magnet in the bottom. The board senses your moves by looking at where magnets disappear and appear, and it plays your opponent's moves by dragging them with an electromagnet underneath the board moved by a pair o…

This is brilliant, I've wondered for some time if something like this was available, it's a great way of linking the online chess boom with tradition, particularly for those of us who don't like staring at screens. I wanted to build one myself, and it was only a complete lack of mechanical know how that stopped me. I don't fancy bullet chess on it tho...

There’s an online chess boom?

Re: Ask HN: What did you make during lockdown?

#324
I made carwala (https://www.carwala.co) - an easy and secure way for people to contact you if anything happens to your car.

You sign up with your phone number, add some details about your car and purchase a membership. We send you a high quality windshield decal that people can scan to contact you if you need to move your car, or if your car has been broken into, etc.

Re: Ask HN: What did you make during lockdown?

#325

I made an automatic chess board that allows you to play with another person over the Internet (using lichess), but with a physical board. It has been described as "very lockdown chic". Each chess piece has a magnet in the bottom. The board senses your moves by looking at where magnets disappear and appear, and it plays your opponent's moves by dragging them with an electromagnet underneath the board moved by a pair o…

I highly recommend you upgrade to the Trinamic drivers! I modded my 3D printer that used the whiny A4988s with TMC2208s and the results are amazingly silent. https://www.reddit.com/r/MPSelectMiniOwners/comments/gsiai0/...

I actually did (half) do this since that post.

I bought one Watterott TMC2208 board and found that it was an easy drop-in replacement, compatible with my microstepping configuration, except the motor connectors needed flipping round else they ran backwards (if you're making a drop-in replacement for another product, and you have the option of making the motors move the same way as the other one, or the opposite way, why would you not just make them move the same way? the mind boggles).

Satisfied with this result, I tried to buy another one for the other axis but could not find another Watterott item on eBay, so ended up buying a no-name one, and it looks basically the same except something is weird about the microstepping modes, and I haven't been able to select a microstepping mode that is suitable, so I've given up on that for now. But at least I've got one quiet axis now, and if I come across a Watterott TMC2208 board, I'll know what to do with it :).

Re: Ask HN: What did you make during lockdown?

#329
Having a monthly "Show HN-athon" would be nice (or is that already a thing and I always miss them?).

- I did some woodworking at the start of lockdown. It was very therapeutic. Built a small table with a flip-top back where charging accessories can be stored: https://imgur.com/ea67ANO

- And some more woodworking to build a shoe rack (never enough room for all our shoes): https://i.imgur.com/ihw12YT.jpg

- A Raspberry Pi using BigGAN to constantly "daydream" weird, artistic photos: https://blog.hmac.io/2020/06/08/a-daydreaming-ai-for-my-desk...

- A new image hashing algorithm that can recognize matching photos even in extreme cases like disparate crops from a parent image. Used it to help my friend dedupe their school's yearbook: https://blog.hmac.io/2020/06/10/writing-new-image-hashing-al...

- Currently building an escape room for my wife's birthday. Poor little 3D printer is working overtime this quarantine :)

Re: Ask HN: What did you make during lockdown?

#330
post #154

Earlier quoted context omitted.

> I'm about to have a heart attack. That's a real panic attack. Drinking cold water can help reset the loop causing it (worked for me maybe once). The only thing that really works for me is GABA (700mg daily for a year, then 250mg daily for life) - but it did come up short in my blood work.

Benzodiazepines are a real treat (as in "works a treat"). Highly addictive tho.

They're great for acute panic, but are not a solution to a chronic problem. Research shows that some antidepressants and 5-HT1A agonists work in the long term for anxiety, though.
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