Live data from Hacker News

$30 Homebrew Automated Blinds Opener (2024)

sifter.org

81–90 of 155 posts

Re: $30 Homebrew Automated Blinds Opener (2024)

#81
post #17

Person just wanted to automate a few "dumb" appliances but ended up building his own system (software and hardware) to do this. I wish I had time to bike shed like this. Just learning, tinkering, and enjoying life.

That's puttering, tinkering, or experimenting. It's a good thing.

Bikeshedding is wasting time on trivial and pointless efforts or discussions. It's a bad thing. :)

https://phk.freebsd.dk/sagas/bikeshed/

https://en.wikipedia.org/wiki/Law_of_triviality

Re: $30 Homebrew Automated Blinds Opener (2024)

#82
post #79

Earlier quoted context omitted.

Tracking and other such indignities removed: https://www.amazon.com/dp/B07FSFBSXY

Sorry, I just used the copy link button on Amazon

Thank you for the link and the recommendation!

I'm just, you know, sort of neurotic about certain things, and I know I'm not alone here on HN. :)

Re: $30 Homebrew Automated Blinds Opener (2024)

#84
post #47

Earlier quoted context omitted.

So that's a funny thing, your blinds are on the inside of your house so the sun energy is hitting them and dissipating from there. Hopefully your blinds are white and reflecting more of it out than the other surfaces it would otherwise hit. But if you want to make a real temperature difference you need blinds on the other side of the insulated box otherwise known as an awning.

If you've ever encountered German rolladen you'll forget all about awnings.

Awnings are, IMO strictly better than those:

- You never have to move them

- In the summer (when the sun is higher) it blocks out lots of sun

- In the winter (when the sun is lower) it lets in more sun

Re: $30 Homebrew Automated Blinds Opener (2024)

#85
post #82

Earlier quoted context omitted.

Sorry, I just used the copy link button on Amazon

Thank you for the link and the recommendation! I'm just, you know, sort of neurotic about certain things, and I know I'm not alone here on HN. :)

Nah it’s all good, I appreciate the decluttering of the link!

Re: $30 Homebrew Automated Blinds Opener (2024)

#86

I just want to share that these are by far the best home automation you can have. I love my smart lights, hacked together smart humidifier, smart fans (the vornado dc fans with outlet switches), intake air pump, and air quality monitoring. But nothing has the quality of life impact of smart blinds. It’s the best, and probably only, way to reliably keep your sleep schedule in sync. Smart lightbulbs - four of the brigh…

Ya, it’s especially nice if you have a lot of windows and want to open or close them all at once. Lutron blinds were the first improvement we made to the house and was a no brainer even at the highish price we paid.

Re: $30 Homebrew Automated Blinds Opener (2024)

#87

"I doubled up the relays feeding the main motor and the heating coil, which gives a lot more headroom on the amperage" ...That's not how that works. One of the relays is going to close first, and those set of contacts will take all the load. Similarly, one set is going to bear all the drama from breaking the connection (and with the motor, there's inductive kickback.) The correct way to do this is to look up the moto…

Looks to me like he maintained proper mains separation except for the one assembly mistake he admitted to (which wasn't catastrophic, obviously -- his wiring color choices look good for avoiding catastrophic errors). The relay board he's using (I recognize it) is rated for mains voltages, and power-wise is ok-ish for the task (I wouldn't choose it for a commercial product, but for his exact scenario--see below--it's probably ok). Doubling up the relays works fine for the main concern, which is overheating via sustained high amperage, which is how fires start. Surge risk is usually just welding the relay, not starting a fire (unless you're way over spec, which he is not), and it almost always welds shut, not open, so less likely to fail silently into the scenario where it's running on one relay and the sustained amperage becomes a risk, and instead into behaving obviously badly as is typical when motherboards go out (at which point you turn it off and rectify, just like a commercial one). He mentions the whole unit is isolated from mains when not in use, so in that respect it's safer than a commercial one as long as he doesn't run it when away from home/asleep.

Again, not a viable commercial design, but not insane with proper supervision either.

I was curious how you knew about the leak sensor so I did a quick search, and see you're just making things up to complain about -- that model has a turbidity sensor (which I suspect are the NC wires you noticed), but no leak sensor. Oh no! His water might be too turbid! Also the fill valve is wired inline with the float switch (in the machine itself), so it's double-covered for overflow prevention. Flooding seems highly unlikely.

The flaky connections he mentions are the 3 volt ones -- again, not a fire risk. Common for low-voltage contacts like that to get flaky in commercial devices too (e.g., face-plate contacts for thermostats, etc) and without disastrous outcomes. The high-voltage/amperage connections he uses are plugged into the OEM harness, so the same connectors as the OEM motherboard. So, again, seems like you're just making up things to complain about.

I don't want to encourage people to mess with mains power if they're not adequately informed, but it's also not a magical domain you can't learn about with a little research and caution (easier in the US than the UK...). And his gadget worked for years, by the sounds of it, which is better than any commercial appliance I've bought in the last decade...

But I agree he's probably gambling on the home insurance issue, even if his device(s) isn't at fault...

Re: $30 Homebrew Automated Blinds Opener (2024)

#88

I just want to share that these are by far the best home automation you can have. I love my smart lights, hacked together smart humidifier, smart fans (the vornado dc fans with outlet switches), intake air pump, and air quality monitoring. But nothing has the quality of life impact of smart blinds. It’s the best, and probably only, way to reliably keep your sleep schedule in sync. Smart lightbulbs - four of the brigh…

The blinds shown under this article are pretty ordinary vinyl type blinds that leak a ton of light. I wish I could find blinds thick enough to behave like cardboard over windows, that could also be opened on a daily cadence. At this point I gave up on blinds and put a shirt over my eyes to sleep. I thought about just covering the windows permanently but I don't relish that idea.

We just had blinds installed from ublockout.com (hope it's not against the rules to link this - I have zero affiliation with them other than being a recent customer). The price was reasonable and they do the job. By far the biggest sources of light in my bedroom now are leakage under doors and various small LEDs (not enough to bother me, but of course there are ways to tackle that too).

Re: $30 Homebrew Automated Blinds Opener (2024)

#89
post #48

Earlier quoted context omitted.

The blinds shown under this article are pretty ordinary vinyl type blinds that leak a ton of light. I wish I could find blinds thick enough to behave like cardboard over windows, that could also be opened on a daily cadence. At this point I gave up on blinds and put a shirt over my eyes to sleep. I thought about just covering the windows permanently but I don't relish that idea.

Curtains.

bonus: they can make a space look homey instead of like an office!

I’d recommend a double rod, a blackout curtain on the rod closest to the window, and a “pretty” curtain on the outer rod. Gives you best of both worlds. Functional and pleasing, like at a hotel.

Re: $30 Homebrew Automated Blinds Opener (2024)

#90

If you want something less jank I suggest this https://www.thingiverse.com/thing:2071225 3d printed gear box with a servo that sits inline with the shaft. Invisible outside of the blinds if you route the cables correctly. I controll mine with esphome and home assistant rock solid for years

How is it for sound isolation? One thing I like about the OP is attention to isolating the motor from the wall and blinds by soft bits so you don't get amplified motor buzz.
Post reply on HN