User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Sat Oct 27, 2018 2:50 am

tlfong01 wrote:
Sun Oct 21, 2018 8:21 am
Cat spa tub weekend plumbing work - Part 3
Now I am order a digital float ball switch from TaoBao, for 14 yuan. I could not figure out how the things works, just by looking at the illustrations. So I need to wait for its arrival, hopefully in 2 days. I think I can use it for the cat spa tub.
Float Ball Switch
https://item.taobao.com/item.htm?spm=a1 ... 9024197118
https://item.taobao.com/item.htm?spm=a1 ... 4857563461

Float balll switch and Float ring switch

Earlier I made a laughable mistake of thinking that a float ball switch must have a floating object with the shape of a ball or sphere or at least an oblong ball like thing. So I ordered two things, one with a ball, another with a tube, with reed switch sensor inside the tube, thinking that they should work together.

But after seeing the objects, I know that they are two different things, each of which works alone, and not at all supposed to work together.

The float ball switch is sort of a all mechanical water tap, controlling the water flow, much like the float ball thing in home's traditional toilet flush tank.

The other is a floating magnetic core, used to sense the water position by switching on or off of a reed switch, to work like a push button, to be detected by say, a Rpi GPIO pin, ...

I often mixed up Reed Switch with Hall effect sensor. I once thought that Reed Switch was invented by a guy named Reed (I did not know the meaning of 'reed' then), and Hall effect sensor by another guy called Hall. I read that Hall was from Cambridge, and always thought that he was just another very smart guy from Cambridge, UK (I did not know then there is another Cambridge in US).

Just now Google told me that Reed switch was invented by Ellwood in 1936 at Bell Lab, US, and Hall effect discovered by 1879 by Edwin Hall while he was working on his doctoral degree at Johns Hopkins University in Baltimore, Maryland, US, ...
Attachments
float_switches_2018oct2702.jpg
float_switches_2018oct2702.jpg (181.21 KiB) Viewed 6262 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Sat Oct 27, 2018 8:18 am

tlfong01 wrote:
Fri Oct 26, 2018 2:15 pm
Weekend Plumbing Work Plan

The Humble Plumber

So this morning I had all my plumber tools, and accessories ready, and started to according to my plan, insert two 1/2" pipes with screws before the hot and cold water batch taps.

I thought I could proudly complete the easy job within 20 minutes.

1. I first tried to remove the two 1/2 inch nuts from the far end of the pipe connecting the taps, but I found the screws got very rusty and stuck and impossible to turn. I gave up after 5 minutes of hard labour.

2. Then I tried to remove the two 3/4 screws nearest the taps instead. The 3/4 screws also refused to move, and I had to use WD40 to lubricate the threads. Finally, after more hard work, I could finally remove the taps.

2. I then tried to complete the job with all the accessories I just bought, including 3/4 inch to 1/2 inch adapters, with different combinations of external and internal threads, and 1/2 inch taps. But I found that I forgot to buy the most important adapter with the unique external/internal combination of threads. I tried all alternatives, but all with no luck.

3. The cheap 1/2 inch and 3/4 inch spanner I just bought also disappointed me. It is not doing its job properly, and my old adjustable spanners are awkward to use for big the 3/4 size screws. I also forgot to buy the 3/4 inch nylon washers, and had to use the old worn out ones

4. After two hours, I found it impossible to complete the job and so I fell back to the original arrangement.

In other words, I was going back to square one! But it is not exactly back square one, because the worn out washers were not fitting well, and one of the taps is leaking, so it is worst than square one.

5. My lesson learnt is not to look down other people's trade. Plumber's work looks simple and easy, comparing to the seemingly more complicated electronics, but, well, I now appreciate more why many plumbers make more money than electronics technicians (yes, I was once upon a time an electronics technician, doing maintenance work of semiconductor testing equipment in local factories;my tool of trade then was a screwdriver, not a spanner. :) , ...

So the humble plumber called it a day.
Attachments
the_humble_plumber_2018oct2701.jpg
the_humble_plumber_2018oct2701.jpg (181.39 KiB) Viewed 6247 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Wed Oct 31, 2018 9:41 am

tlfong01 wrote:
Sat Oct 27, 2018 8:18 am
tlfong01 wrote:
Fri Oct 26, 2018 2:15 pm
Weekend Plumbing Work Plan
The Humble Plumber
In other words, I was going back to square one! But it is not exactly back square one, because the worn out washers were not fitting well, and one of the taps is leaking, so it is worst than square one.
5. My lesson learnt ...
So the humble plumber called it a day.

Rooftop Garden Water Pipe Sizes

(Rooftop Garden) RE: GPIO.INPUT VOLTAGE LEVELS VS EDGE DETECTION Postby tlfong01 » 2018-Sep-06
viewtopic.php?f=32&t=219744&start=150#p1362098
Attachments
rooftop_garden_water_pipes_2018oct3102.jpg
rooftop_garden_water_pipes_2018oct3102.jpg (150.54 KiB) Viewed 6189 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Sat Nov 03, 2018 5:10 am

tlfong01 wrote:
Wed Oct 31, 2018 9:41 am
Weekend Plumbing Work Plan
The Humble Plumber
In other words, I was going back to square one!
5. lesson learnt ...
Rooftop Garden Water Pipe Sizes
[/quote]


Hot water Cold water 3/4 inch / 1/2 inch piping Saturday morning exercise

Last Saturday morning my plumbing work ended up in a big mess. This Saturday morning I was more prepared and planned, and completed the job in less than one hour. However the pipe joints are slightly leaking. I guess I did not know some of the tricks. I only observed the plumber when he comes to work and thought I know all the tricks. Well, all jobs, including computer programming, are easier seeing than doing.
Attachments
cat_spa_piping_2018nov0304.jpg
cat_spa_piping_2018nov0304.jpg (177.58 KiB) Viewed 6132 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Mon Nov 05, 2018 4:10 am

tlfong01 wrote:
Sat Nov 03, 2018 5:10 am
Rooftop Garden Water Pipe Sizes
Hot water Cold water 3/4 inch / 1/2 inch piping Saturday morning exercise

Cat Bath Float Ball Switch

Now I have bought a 50 yuan float ball switch for the cat bath.

AliExpress / TaoBao Float Ball Switch
https://www.aliexpress.com/item/EM15-2- ... 8d2e761856
https://detail.tmall.com/item.htm?id=52 ... 3ad4Rx4BZL
...
Attachments
cat_bath_float_switch_2018nov0502.jpg
cat_bath_float_switch_2018nov0502.jpg (150.7 KiB) Viewed 6105 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Mon Nov 05, 2018 5:33 am

tlfong01 wrote:
Mon Nov 05, 2018 4:10 am
Cat Bath Float Ball Switch
AliExpress / TaoBao Float Ball Switch
https://www.aliexpress.com/item/EM15-2- ... 8d2e761856
https://detail.tmall.com/item.htm?id=52 ... 3ad4Rx4BZL

Float switch calibration

I found the float ball has a hysteresis of about 90 degrees. The ball flips about about +45 degrees and flops about -45 degrees.


Update 2018nov06hkt1125

The big plastic float ball switch has inside a small but heavy stainless steel ball which rolls along a grove. When the big plastic ball tilts upwards, the small steel ball rolls down towards a micro switch and activates it. When the big ball tilts downwards, the small steel ball rolls away from the micro switch and deactivates it.
...
Attachments
float_switch_calibration_2018nov0501.jpg
float_switch_calibration_2018nov0501.jpg (173.84 KiB) Viewed 6099 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Tue Nov 06, 2018 6:34 am

Rooftop Garden Solar Panel Design Notes

TaoBao Solar Panel
https://item.taobao.com/item.htm?spm=a2 ... t=9#detail
https://item.taobao.com/item.htm?spm=a2 ... t=9#detail

AliExpress Solar panel 30w 12v US$25
https://www.aliexpress.com/item/solar-p ... d9792eda7b

Solar panel 30w 12v solar system for home, charger, boat

Material :polycrystalline

Maximum 30 degree arc bendable.

Short circuit and surge protection technology keep you and your devices safe.

Wide application, suitable for laptops, car batteries, car, Boat, Ship and more.

Description

The unique process component, beautiful and strong anti-snow, convenient installation.

Suitable for home lights, electric fans, such as solar water pumps, solar street lights, small solar systems, etc.

Light and thin, easy to use and carry.

Material: polycrystalline

Size: 420 * 370mm

Color: white & black
Attachments
rooftop_garden_solar_panel_2018nov0601.jpg
rooftop_garden_solar_panel_2018nov0601.jpg (166.96 KiB) Viewed 6067 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Wed Nov 07, 2018 8:29 am

tlfong01 wrote:
Sat Nov 03, 2018 5:10 am
Weekend Plumbing Work Plan[/color][/color] [/color]
The Humble Plumber[/color][/color]
In other words, I was going back to square one!
lesson learnt ...
Rooftop Garden Water Pipe Sizes
Hot water Cold water 3/4 inch / 1/2 inch piping Saturday morning exercise

Cat Jacuzzi Design Notes

Last Saturday's pipe work is leaking heavily. I gave my plumbing homework a C-- grade.

Anyway, I fixed the problem this afternoon, also adding a tap for the cat milk bar.

I am also reading jacuzzi things, thinking of making a cat jacuzzi some time.

Appednices - Rpi Jacuzzi

Raspberry P Wifi Jacuzzi Automation 2016
https://www.youtube.com/watch?v=YuuIRmlLjZ0

Raspberry Pi Hot Tub Controller 2016
https://www.youtube.com/watch?v=LOwnG5V ... oller.html

Hot tub 2013
viewtopic.php?t=52840

Jacuzzi Remote 2018
https://lb.raspberrypi.org/forums/viewt ... p?t=175399
Attachments
cat_spa_piping_repair_2018nov0703.jpg
cat_spa_piping_repair_2018nov0703.jpg (170.99 KiB) Viewed 6031 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Thu Nov 08, 2018 8:11 am

tlfong01 wrote:
Wed Nov 07, 2018 8:29 am
Weekend Plumbing Work Plan
The Humble Plumber
In other words, I was going back to square one!
lesson learnt ...
Rooftop Garden Water Pipe Sizes
Hot water Cold water 3/4 inch / 1/2 inch piping Saturday morning exercise
Cat Jacuzzi Design Notes. I gave my plumbing homework a C-- grade.
Anyway, I fixed the problem this afternoon, also adding a tap for the cat milk bar.

Cat milk drinking fountain tap

Now I am assembling a TaoBao 50 yuan 1/4 inch quick connector drinking fountain tap.

Aliexpress Lead-free Drinking Water Filter System Faucet SUS304 Stainless Steel Kitchen Drinking Water Filter Tap Faucet TP-02 US$30
https://www.aliexpress.com/item/Lead-fr ... 53437.html

TaoBao 304 Stainless 1/4 inch quick connector drinking fountain tap food grade ¥49
https://item.taobao.com/item.htm?spm=a1 ... 6738044756
Attachments
cat_bar_tap_2018nov0801.jpg
cat_bar_tap_2018nov0801.jpg (166.1 KiB) Viewed 6008 times
Last edited by tlfong01 on Thu Nov 08, 2018 11:40 am, edited 1 time in total.
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Thu Nov 08, 2018 8:36 am

tlfong01 wrote:
Thu Nov 08, 2018 8:11 am
Cat milk drinking fountain tap
Now I am assembling a TaoBao 50 yuan 1/4 inch quick connector drinking fountain tap.

Cat Milk Spa 1/4 inch pipe and tap assembly notes
Attachments
milk_piping_quarter_inch_2018nov0801.jpg
milk_piping_quarter_inch_2018nov0801.jpg (147.38 KiB) Viewed 5999 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Fri Nov 09, 2018 7:57 am

tlfong01 wrote:
Thu Nov 08, 2018 8:36 am
Cat milk drinking fountain tap
Now I am assembling a TaoBao 50 yuan 1/4 inch quick connector drinking fountain tap.
Cat Milk Spa 1/4 inch pipe and tap assembly notes


Cat Bar Milk Fountain Making Notes
...
Attachments
cat_bar_milk_fountain_2018nov0801.jpg
cat_bar_milk_fountain_2018nov0801.jpg (155.89 KiB) Viewed 5966 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Fri Nov 09, 2018 12:24 pm

tlfong01 wrote:
Fri Nov 09, 2018 7:57 am
Cat milk drinking fountain tap
Now I am assembling a TaoBao 50 yuan 1/4 inch quick connector drinking fountain tap.
Cat Milk Spa 1/4 inch pipe and tap assembly notes
Cat Bar Milk Fountain Making Notes 1

Cat Bar Milk Fountain Making Notes 2
...
Attachments
cat_milk_2018nov0904.jpg
cat_milk_2018nov0904.jpg (140.43 KiB) Viewed 5950 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Sun Nov 11, 2018 7:31 am

tlfong01 wrote:
Fri Nov 09, 2018 12:24 pm
Cat Bar Milk Fountain Making Notes 2

ESP8266 Shower Timer

I felt jealous of the guy with a wifi shower timer. So I will make myself one.

ESP8266 Shower Timer - Patrick Walsh 2016nov29
https://www.spiria.com/en/blog/iot-m2m- ... er-esp8266
...
Attachments
esp8266_shower_timer_2018nov1101.jpg
esp8266_shower_timer_2018nov1101.jpg (171.46 KiB) Viewed 5913 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Sun Nov 11, 2018 7:42 am

tlfong01 wrote:
Sun Nov 11, 2018 7:31 am
ESP8266 Shower Timer
I felt jealous of the guy with a wifi shower timer. So I will make myself one.
ESP8266 Shower Timer - Patrick Walsh 2016nov29
https://www.spiria.com/en/blog/iot-m2m- ... er-esp8266
...

Esp8266 Wifi Show Timer
...
Attachments
wifi_shower_timer_2018nov1104.jpg
wifi_shower_timer_2018nov1104.jpg (173.4 KiB) Viewed 5887 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Wed Nov 14, 2018 8:00 am

tlfong01 wrote:
Sun Nov 11, 2018 7:42 am
ESP8266 Shower Timer
I felt jealous of the guy with a wifi shower timer. So I will make myself one.
ESP8266 Shower Timer - Patrick Walsh 2016nov29
https://www.spiria.com/en/blog/iot-m2m- ... er-esp8266
Esp8266 Wifi Show Timer
[/color]

Rooftop Garden Mobile Cat Milk Bar Cart Assembly Notes
Attachments
mobile_cat_milk_bar_2018nov1401.jpg
mobile_cat_milk_bar_2018nov1401.jpg (167.7 KiB) Viewed 5844 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Wed Nov 21, 2018 4:16 am

tlfong01 wrote:
Wed Nov 14, 2018 8:00 am
tlfong01 wrote:
Sun Nov 11, 2018 7:42 am
ESP8266 Shower Timer
I felt jealous of the guy with a wifi shower timer. So I will make myself one.
ESP8266 Shower Timer - Patrick Walsh 2016nov29
https://www.spiria.com/en/blog/iot-m2m- ... er-esp8266
Esp8266 Wifi Show Timer
[/color]
Rooftop Garden Mobile Cat Milk Bar Cart Assembly Notes

Weekend Plumbing Homework Preparation Notes


Aeroponics/Hydroponics/Vertical/Urban Farm References

US vertical farm grows without soil, sunlight or water - 2016aug14
https://www.theguardian.com/environment ... revolution

Netherlands Floating Farm - 2018nov17
https://www.bbc.com/news/business-45130010

UAE Bio Farm
https://www.youtube.com/watch?time_cont ... lm4-3yjga8

Japan Farming Without Soil - 2017may22
https://www.scmp.com/magazines/style/ar ... -fruit-and

Smart Robots Clean the Bathroom - 2018nov15
https://www.youtube.com/watch?time_cont ... x3QdaPD8bw
...
Attachments
plumb_work_weekend_2018nov2101.jpg
plumb_work_weekend_2018nov2101.jpg (144.96 KiB) Viewed 5536 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Sat Nov 24, 2018 9:35 am

tlfong01 wrote:
Wed Nov 21, 2018 4:16 am
Rooftop Garden Mobile Cat Milk Bar Cart Assembly Notes
Weekend Plumbing Homework Preparation Notes

Cat Milk Bar Stand Assembly Notes
...
Attachments
cat_bath_stank_2018nov2401.jpg
cat_bath_stank_2018nov2401.jpg (163.2 KiB) Viewed 5310 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Mon Nov 26, 2018 9:03 am

tlfong01 wrote:
Sat Nov 24, 2018 9:35 am
Rooftop Garden Mobile Cat Milk Bar Cart Assembly Notes
Weekend Plumbing Homework Preparation Notes
Cat Milk Bar Stand Assembly Notes

Cat Milk Bar Stand Assembly Notes
...
Attachments
cat_milk_bar_2018nov2601.jpg
cat_milk_bar_2018nov2601.jpg (152.11 KiB) Viewed 5197 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Wed Nov 28, 2018 1:12 pm

tlfong01 wrote:
Mon Nov 26, 2018 9:03 am
Rooftop Garden Mobile Cat Milk Bar Cart Assembly Notes
Weekend Plumbing Homework Preparation Notes
Cat Milk Bar Stand Assembly Notes

Cat Milk Car Cart Assembly Notes
...
Attachments
car_bar_bottom_2018nov2802.jpg
car_bar_bottom_2018nov2802.jpg (191.34 KiB) Viewed 5110 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Wed Nov 28, 2018 1:57 pm

tlfong01 wrote:
Wed Nov 28, 2018 1:12 pm
Rooftop Garden Mobile Cat Milk Bar Cart Assembly Notes
Weekend Plumbing Homework Preparation Notes
Cat Milk Bar Stand Assembly Notes

Cat Milk Car Cart Assembly Notes

Rpi3B+ ESP8266-12 Based Smart 5kg/1g Weight Scale Making Notes Part 1
viewtopic.php?f=37&t=227137&sid=2462eec ... 0#p1398186
...
Attachments
cat_milk_bar_2018nov2801.jpg
cat_milk_bar_2018nov2801.jpg (179.56 KiB) Viewed 5103 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Tue Dec 04, 2018 1:00 pm

tlfong01 wrote:
Wed Nov 28, 2018 1:57 pm
Cat Milk Car Cart Assembly Notes

Model LXC-15D Water Meter Spec

01. GB/T778.1~3-2007 ISO04064.
02. Brass body dry type, magnetic drive single stream.
03. 15mm, Q3/Q1 = 80, Overflow Q4 = 3.125 m3/h, Regular Q3 = 2.5 m3/h.
04. Threshold flow Q2 = 50 l/h, min flow Q1 = 31.3 l/h.
05. Min reading = 0.00005 m3, Max = 99999 m3.
06. Temperature grade = T30.
07 Pressure grade = Map 10.
08. Press loss = d P63
09. Up stream field sensitivity grade = U5
10. Down stream field sensitivity grade = D0
11. Max permissible error Low range (Q1 <= Q <= Q2) = 5%.
12. Max permissible error High Range (Q2 <= Q < Q4) = 2%


LXS-15F3 Water Meter Intro Video (Chinese)
http://llmeter.com/shipin1.asp?tab=%CA% ... B3%CC&id=3

...
Attachments
water_meter_2018dec0401.jpg
water_meter_2018dec0401.jpg (163.6 KiB) Viewed 4724 times
Last edited by tlfong01 on Thu Dec 06, 2018 4:03 am, edited 1 time in total.
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Wed Dec 05, 2018 2:25 am

tlfong01 wrote:
Sat Jun 02, 2018 2:10 pm
I bought a KY019 relay module some weeks ago. I could not find the specification

Fake KY019 vs Real KY019

The KY019 I bought is a fake!

Real KY019) RE: SIMPLE RELAY CIRCUIT - woodystanford 2017-Mar-15
viewtopic.php?f=37&t=177427#p1131013

(Fake KY019) RE: RELAY MODULE KY-019 5V - tlfong01 2018-Jun-02
viewtopic.php?f=37&t=77158#p1323061


...
Attachments
fake_ky019_2018dec0501.jpg
fake_ky019_2018dec0501.jpg (155.12 KiB) Viewed 4602 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Thu Dec 06, 2018 5:08 am

tlfong01 wrote:
Wed Nov 28, 2018 1:57 pm
Cat Milk Car Cart Assembly Notes
Rpi3B+ ESP8266-12 Based Smart 5kg/1g Weight Scale Making Notes Part 1

Fish Tank Management System - Adafruit Learning System

Reef-Pi: the ultimate Raspberry Pi fish tank management system - last updated 2018dec05
https://www.raspberrypi.org/blog/reef-p ... nt-system/
https://learn.adafruit.com/reef-pi-inst ... figuration

If you’ve ever had a pet fish, even the saddest of fairground goldfish, you’ll appreciate how much work and attention they require. And to those who have never owned a fish: believe me, it’s more than you’d assume.

And the moment you upgrade from goldfish to brightly coloured, tropical beauties, and replace the standard silk reeds and gravel with live aquatic plants and soil, you suddenly have to factor in things like optimum temperature and chemical levels.

Thankfully, Adafruit Learning System author and loving fish parent Ranjib Dey has been working on a tutorial series called Reef-Pi, a collection of how-to guides that help you build the ultimate in Raspberry Pi reef aquarium management system.

Reef-Pi monitors pH, chemical, and water levels, controls temperature, light, and power, and automates the management of these aspects so you don’t have to think about them. Phew!

And if you don’t fancy a massive coral-filled saltwater tank like Ranjib’s, you can use parts the Reef-Pi series for your own tank, whatever its setup, because many of the operations are similar or easy to adjust for your needs.

Any excuse to show off beautiful Jean to the world

Take, for example, my new Betta, Jean Tannen. While Jean’s tank is a much smaller size, and Jean its only resident (for now), I still need to keep an eye on the chemical balance of his water, the heat of his tank, and when his lights should be turned on or off. Even the most commonplace goldfish will appreciate many of the services Reef-Pi automates.

The Reef-Pi system uses a variety of components, including Raspberry Pi Zero and/or Raspberry Pi 3, and each stage of building the project is well-documented on the Adafruit Learning System. So if you’re looking to upgrade your tank, or have always fancied having pet fish but don’t want the hassle of tank management, give Reef-Pi a gander and see what you think.

We’re going to try it!

Sarah, our new Operations Manager, has been looking to upgrade her giant fish tank with a Raspberry Pi or two, so we’ll be sure to share her progress in the new year. If you decide to give Reef-Pi a try, or have already automated your tank with a Pi, let us know in the comments, or tag us on Twitter or Instagram!
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Sun Dec 09, 2018 12:13 pm

tlfong01 wrote:
Tue Dec 04, 2018 1:00 pm
tlfong01 wrote:
Wed Nov 28, 2018 1:57 pm
Cat Milk Car Cart Assembly Notes
Model LXC-15D Water Meter Spec
01. GB/T778.1~3-2007 ISO04064.
02. Brass body dry type, magnetic drive single stream.
03. 15mm, Q3/Q1 = 80, Overflow Q4 = 3.125 m3/h, Regular Q3 = 2.5 m3/h.
04. Threshold flow Q2 = 50 l/h, min flow Q1 = 31.3 l/h.
05. Min reading = 0.00005 m3, Max = 99999 m3.
06. Temperature grade = T30.
07 Pressure grade = Map 10.
08. Press loss = d P63
09. Up stream field sensitivity grade = U5
10. Down stream field sensitivity grade = D0
11. Max permissible error Low range (Q1 <= Q <= Q2) = 5%.
12. Max permissible error High Range (Q2 <= Q < Q4) = 2%


LXS-15F3 Water Meter Intro Video (Chinese)
http://llmeter.com/shipin1.asp?tab=%CA% ... B3%CC&id=3

Smart Cat Bath Water Flow Volume Meter installation Notes

Water meter proximity sensor - Domoticz
https://www.domoticz.com/wiki/PiFace

Analog water meters are equipped with a x0.0001 m3 dial which makes one revolution per liter. On top of this dial a half moon iron disc is attached. By sensing the revolutions of this disc and counting them the water flow can be logged in Domoticz.

This solution uses a proximity sensor available through dx.com described as K1208065 Metal Detection Sensor Module for Arduino at just USD 7,99. It has 3 wires: Brown (+12V), Blue (ground) and black. The black wire connects to ground when metal is detected within a range of 4mm from the sensor. Also a LED at the rear of the sensor will light up. Check the documentation on the device itself because the information at the dx.com website is different (and wrong) at the time of writing.


ESP8266 Battery Powered Plant Watering - Instructables
https://www.instructables.com/id/Smart-Plant-Watering/
https://www.instructables.com/id/Batter ... -Watering/
...
Attachments
smart_cat_bath_flow_volume_meter_2018dec0901.jpg
smart_cat_bath_flow_volume_meter_2018dec0901.jpg (187.9 KiB) Viewed 4376 times
I am an electronics and smart home hobbyist.

User avatar
tlfong01
Posts: 1312
Joined: Sat Jun 02, 2018 1:43 pm
Location: Hong Kong

Re: Relay Module KY-019 5V

Tue Dec 11, 2018 5:03 am

tlfong01 wrote:
Sun Dec 09, 2018 12:13 pm
ESP8266 Battery Powered Plant Watering - Instructables
https://www.instructables.com/id/Smart-Plant-Watering/
https://www.instructables.com/id/Batter ... -Watering/

Battery Powered Plant Watering

(Load Cell Testing) RE: READING OLD WEIGHT SCALE - tlfong01 2018nov22
viewtopic.php?f=37&t=227137#p1395349
...
Attachments
tank_2018dec1101.jpg
tank_2018dec1101.jpg (160.71 KiB) Viewed 4332 times
I am an electronics and smart home hobbyist.

Return to “Automation, sensing and robotics”