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hansc

647 karma · joined April 16, 2012

meet.hn/city/nl-'s-Hertogenbosch

Socials: - linkedin.com/in/hanscrijns

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hansc··on The 'invisible crew' who have 35 seconds to prevent a Eurovision blunder
Same with tradeshows: I have many times been on tradeshows on buildup days. It is a huge mess, full of crates and packaging. Next day, everything is glorious and neat. Just for 3-4 days of 'show'
hansc··on Ask HN: How can I learn to better command people's attention when speaking?
Also similar: Join a local Toastmasters group. This is a global organization where you learn and practice to speak in front of a group, both prepared speeches and spontaneous. It may find weird to join it, but I would advice to visit one once in your neighborhood: They are all super friendly and I have seen dozens of people come in and move from shy and awkward to great storytellers in just a year or so.
hansc··on A common urban intersection in the Netherlands (2018)
I live in The Netherlands (actually in the same city as the photo's were taken): There is a very large difference in traffic density and complexity between the larger cities such as Amsterdam, Rotterdam, The Hague, Utrecht and the rest of the country (including middle sized cities).

When I visit one of those larger cities, I am also constantly looking for bikes everywhere not to be crashing into me.

hansc··on Sleep duration, chronotype, health and lifestyle factors affect cognition [pdf]
I do sleep 8+ hours each night (Netherlands): Up at 7.30, leave at 8.15, 30m commute. Leave work at 5.15, get to sleep around 10.45.
hansc··on Stable Fast 3D: Rapid 3D Asset Generation from Single Images
Looks very good on examples, but testing a few Ikea chairs or a Donald Duck image gives very wrong results.

You can test here: https://huggingface.co/spaces/stabilityai/stable-fast-3d

hansc··on Ask HN: Is it just me or is mobile web browsing awful?
I use nextDNS to block all ads on my iPhone X, works like a charm
hansc··on Wireshark Is 25: The email that started it all and lessons learned along the way
Also fun debugging VoIP traffic to the local network, and seeing dns-queries from collegues PCs on the network, then asking them: Are you visiting xyz-webpage, and seeing their reaction!?
hansc··on Wireshark Is 25: The email that started it all and lessons learned along the way
Such a great tool and 100% free. Use it often to debug network issues and see where devices connect to. Like someone else said: a multimeter for networks.

Also used it to learn about WiFi connection setup with acces point. Can see all the beacon packets and WiFi packets

hansc··on Bolwoningen: Living in spherical homes
Nice, these are located less than a mile from my home and nicely situated along a stream, just like a bunch of mushrooms in a forest.

They have been around for decades and were an innovation project from an alternative living cooperation in the city (Den Bosch).

I think they are now mostly occupied by students and 30-.

hansc··on Farming technologies tackle climate-change threats
I would add biocyclic vegan farming: Vegatable farming without use of manure or artificial fertilizer. https://www.biocyclic-vegan.org/
hansc··on Ask HN: What's your opinion on weekly 1:1s?
Author here. Thanks for all the great and different insights and experiences. Especially also about 'feeling being listened to'.

To be fair, I was a bit short in my description: I do have a great relationship with my manager and he is one of the best managers I ever had. Also, I am not a developer, but a product manager, so already used to steering the 'ship'. We are in a relatively small team of 6 and we are all sitting together (including manager).

hansc··on Ask HN: What is the most cost effective way to do backups?
Maybe not what you are looking for, but I do it the manual way. Low-end, but reliable once in a while: USB3.2 external SSD (example 60usd on NewEgg for SanDisk 1TB)
hansc··on Parents in Ireland town to voluntarily ban smartphones for kids as old as 13
My kids worried about this as well when they got a smartphone. Turns out there is not much of an issue, some of their friends are on the phone a lot of the time, some of them not. Their friends get used to it and both kids don't have issues getting friends.
hansc··on Ask HN: What other news feeds do you read besides Hacker News?
Embedded HW (commercial): https://www.cnx-software.com/

Electronics (diy): https://hackaday.com/blog/

hansc··on A DIY business card that runs Linux (2019)
Author also wrote a post on the design process, very interesting I think: https://www.thirtythreeforty.net/posts/2019/12/designing-my-...
hansc··on Ask HN: Who is hiring? (June 2023)
CTOUCH | Senior Backend Developer | Eindhoven, The Netherlands | ONSITE (hybrid)

At CTOUCH we develop large-format, Android-based touchscreens for education and business up to 86". We have been operating for seven years, are about 80 people and have been profitable for a long time.

We are looking for a senior (backend) developer to head our growing development team of frontend, backend and Android developers.

More info and applications here: https://ctouch.eu/nl/vacatures/senior--developer

hansc··on What If Friendship, Not Marriage, Was at the Center of Life?
I like what Steven Covey writes: "Love is a verb".

I find that both my wife and myself, and myself and my kids get closer by doing things together that we all enjoy. This ranges from trying out a new restaurant in town, to going to a museum or themepark we all enjoy, to going on holidays.

What I am trying to say is that experiencing things together may help you bond more and experience pleasant feelings together.

hansc··on What If Friendship, Not Marriage, Was at the Center of Life?
In my family and friends group, friendships and partners can often orthogonal: You do different things with different people and they add to life experience, not substract.

I can imagine that if you state to your partner that they are number two and always will stay, it might already put a strain on the relationship: In a sense a self-fulfilling prophecy.

hansc··on Adventures in Autorouting (2017)
For these simple designs (and more complicated ones), my experience shows me that the problem has been solved with Eagle and a decent design rule file. I have autorouted tens of 2-layer designs with between 5 and 200 components with Eagle's autorouter and the seeedstudio .drc file as constraints. It's good and quick, give it a try (would take a few sec <50 parts, couple of minutes > 100parts)!

BTW nobody professional uses curved traces (except very rare cases), have a look at any electronics PCB

hansc··on How fast are those packets moving?
This is the case in Multimode fiber, which is used for short distances (meters). For anything longer, single mode fiber is used and the core of the fiber guides the light. See https://garyherlache.wikispaces.com/Digital+Communications+F...
hansc··on Show HN: Top books mentioned in comments on Hacker News
Funny that the first book in the list "Mother...", I cannot find when using hacker news search!?
hansc··on Will Your Hardware Startup Make Money?
It is certainly true that you can spend this amount of money on a product and not make money on the first 5000 product run.

But it is certainly possible to make money on such a first batch: Why do you need inhouse EE, ME, DE en Embedded Engeneer for a headphone. Many of these functions can be done by a small design firm or freelancer that you hire for a much smaller fee. In addition, these people do this all the time for different companies and have a huge experience this way and good contats (you can also go with teh bigger firms, but then you probably need the same amount of money).

hansc··on HW startup: A journey from (Arduino) idea to product
The standard bootloader needs a resonator or crystal to run the oscillator. You can also program a bootloader which uses the internal oscillator in the Arduino IDE, in that case no resonator or crystal is used, like I did with the attiny.
hansc··on HW startup: A journey from (Arduino) idea to product
Typically I start with parts that are much used in Arduino projects. Then I move to Digikey, etc and look for good pricing AND plenty of stock and multiple vendors. This helps avoiding component related delays.
hansc··on HW startup: A journey from (Arduino) idea to product
Thanks for the feedback! We use shopify, will contact them about it.
hansc··on HW startup: A journey from (Arduino) idea to product
Thanks for the nice comment.

To answer your question: 1) Yes, they do. But by measuring the moisture in the soil, you will get an alarm when a certain amount of water is extracted from the soil, being caused by heat, sun or a thirsty plant. After quite a bit of experimentation, we found a threshold value that works for most plants. Not cactuses ;) 2) Indeed we check more often than needed. But if the plant is getting dry, we want to briefly signal every five minutes and before we do that, we do a quick soil check.

hansc··on HW startup: A journey from (Arduino) idea to product
Thanks for your reply.

The resonator is shown in the 'Eagle schematic', right in the middle of the picture. The first schematic is just for the moisture sensor. I used it as a crystal to run the ATMEGA.

When the battery is gone, you just pop open the enclosure and put in a new CR2032 coin cell battery. You can get those at every gas station or supermarket.

hansc··on HW startup: A journey from (Arduino) idea to product
Love to hear your feedback and reactions
hansc··on Show HN: Moistly - Never forget to water your plants
Good question: Currently it doesn't, but we want to add that to the next version of the sw.
hansc··on Show HN: Drawingboard.js
Remark: The download results in an extension-less format. Which format is it?
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