It’s undeniable to take a Raspberry Pi and treat it like a reasonable Linux PC or server. Running an ad blocker or VPN gateway is undeniable and doesn’t require any genuine interface. However, employing the Pi for anything is a huge step forward and a smart solution. The example can be of great help in helping you develop your own projects. [Joeseph Luccisano] published an instruction for this very purpose. The step: build a lawn sprinkler formula at a lower cost.
It is an interesting project since it has hardware and software components, of course. But it also has a hydraulic part, so you have to deal with all three domains coming together.
Of course, your backyard will be different, so some of the design will be replaced if you implement it yourself. However, there is a lot of information about how he placed the zones and why he made his decisions. This deserves to be a smart basis for your own design.
It looks like the software section of the tutorial is a work in progress. But the basic idea is to create an HTTP server using Flask for Python and exposing a basic Web API. An iPhone app called Curler creates a good-looking use interface to call the API. We think you could do the same basic thing with HTTP Request Shortcuts, on Android, or any of many other similar apps.
Of course, you can’t think of sprinklers without thinking about deficient cats. Once you’ve watered your lawn to make it grow, you’ll need to mow the lawn.
Choosing the right relay for an application can really make all the difference. For high-spark programs, you need a hard-touch material. Why not use a sturdy material? Because they have a tendency to rust more. The spark cleans it. While it’s a softer material, the spark will erode it, but it probably has a higher resistance to touch, so you’ll use them for programs that don’t produce sparks (e. g. , low force or dry switching).
There are also tactics to remove the arc that corrodes your contacts, adding to the effect of hitting a nearby magnet (no kidding). See https://www. te. com/commerce/DocumentDelivery/DDEController?Action=srchrtrv
One of the reasons relays get a bad rap is that we tend to think of them all as interchangeable. High-reliability relays are discovered in older aircraft and missiles, but they have been decided upon for the service for which they are used. tendency. Of course, they’re not perfect. But it’s not as bad as other people think because of its reports with random selection of broadcasts.
If you want to switch DC, automotive relays are worth considering, usually intended to have 5 year plus lifespan switching dozens of times a day.
However, I wonder how long we will realize that the lights in our house “don’t last” due to obstruction from energy-efficient LED lights, etc. You may want to schedule a maintenance procedure, purchase a 500W halogen bulb. and place it on one device at a time. Turn the transfer on and off multiple times to erase the contacts:-D
Some use a mercury switch.
Come to think of it, I’ve been disappointed to see how temporarily “good” microswitches become faulty or subjectively “bad” in input or game controller situations. They only use 5V! I would possibly like to find a way to bring them back to life periodically (without damaging anything on the track like an autofire 555)
It’s a challenge from an inadequate cleaning stream.
I use OpenSprinklerPi, my sprinklers are AC powered, so I opted for optoisolators and triacs.
I programmed anything and it’s been running for two years – https://github. com/alfem/gardeneitor
(It is not so documented) 😀
I did a project like this a few years back based upon Arduino. One thing that helps keep everything neat is to mount the boards on the cover. That way it is easier to service and make changes. You can also take it away to make changes.
My lawn sprinkler formula never mows your lawn unless there is a 60% or greater chance of rain in the next 24 hours.
The sheep are doing it too.
Transformer: For North America, it will need to be Rainy Class 2 or Class 3 (Arabic, non-Roman numerals) in accordance with ANSI 5085-3/CSA No. 66. 3. For the others at most, you will have to comply with standard IEC61558-6. , probably Class II (Roman numeral) and inherently limited.
Relays – this model is should not be used for this application.
I knew some of Sierra Wireless’ compliance engineers; They knew what they were doing. Therefore, they may want to speak with their in-house subject matter experts.
Doh, be IEC61558-2-6.
There are some things I don’t understand and this turns out to be the most productive position to ask about them. First of all, why is the Raspberry Pi in particular making headlines? If I hadn’t had fitness and other issues, these are the kinds of things I would have done with my 8-bit computers as a kid. All 8-bit and at most 16-bit computers had expansion ports that could be used for home automation, robots, or whatever with just a bit of external logic. This included the PC with its ISA bus, and the ISA bus was still there when the Pi was released. Microcontrollers became accessible to hobbyists at the end of the 8-bit era and never went away. The Pi counts as one, in a way, but it’s just one among thousands. As far as I know, this has never been the maximum aperture 32-bit card. Parallel printer ports haven’t gone away either, as they are available as USB add-ons and configurable as a kind of GPIO. The only really false thing I know in favor of the Pi is that it is available in many countries. I guess that’s a big plus. What really bothers me is all the fuss. If you think about my background (all that wisdom about how to do these things and all the frustration of not being able to use them), you’ll see how offensive it was when hordes of fit, competent people declared the Pi to be garbage. 1 for being a miracle!
The other thing is HTTP making the headlines. I suppose it’s more understandable on a hardware site, but there’s just nothing to serving basic HTTP. I have severe fatigue issues and I get confused over nothing, so nearly all my attempts at programming have failed, but 11 years ago I wrote a relatively full-featured HTTP server in a few weeks. It’s not particularly quick, but it has no problem with virtual hosts or dynamic file generation. Everything I want is easy with it. The whole thing with all its structure and CGI support took about a month, but the server test page – the part of it which serves one page of specialist content – was completed and running within about 3 days of me first starting to learn about HTTP! If you don’t do keep-alive, there’s nothing complicated about HTTP at all. Perhaps even keep-alive would be easy if it was structured a little differently.
I’m from Canada and my portion charge is about four times higher than what’s listed, so your allowance of $67four. four2 (38. 81 16four. 25 356. 30 115. 05) would charge me (including shipping) about 3,000 $CAN for the “hydraulic. “”part. Maybe someone can identify your sources.
Are you looking for a home delivery service? They like to include their accessories, small amounts of screws, etc. on a glossy card for 4 times the value of a genuine hardware store. Too bad Lowes bought them. Anyway, if you take a look at Home Hardware and Rona, Lowes, etc. , who still have their old products in stock, you might find deals. However, prices in general for everything may be a bit “normal” at this point.
I think the lack of hardware tracking time in this design is problematic. You run the risk that in the event of a software issue, one or more relays will stay on, flooding your lawn and wasting money on water. Solutions that work in the original global state will need to take into account failure scenarios.
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