Author Topic: Mini Humidifier very cheap  (Read 412 times)

Offline Col68

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Mini Humidifier very cheap
« on: July 31, 2017, 05:53:31 PM »
 Hello, I have just discovered a new product interesting for home cheesemakers, it is a mini module with relay 220V 10A (quite powerful, humidity sensor of 20 to 95% HR model HR202 using LM393 and a simple potentiometer for the The module is powered from 5 to 12V DC and actuates or controls the 220V AC or 125V AC ... relay 3-pin connection to the common, NO (normally open) and NC (normally closed) Can be used to moisten a refrigerator with conditions to desolder the probe and lengthen with a fine copper wire, here I buy and try, sela works well, I would share the photos after doing the complete assembly, I share this information because The module relais costs + - 3 € voila can be an alternative for small fridge or other at very cheap prices, cordially.
Let us take care of nature and nature will take care of us

Offline Col68

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Re: Mini Humidifier very cheap
« Reply #1 on: August 17, 2017, 11:10:32 AM »
Hello to you, I would like to informed the prospective interested in this article, after having dialogue with the supplier I got a lot of interesting information, this device is not to increase moisture, this device is designed to remove the Excess humidity, for example in the bathroom with a fan, can be used in a real or natural cave to prevent extreme humidity, to operate this unit, turn the potentiometer until the Relay is switched on (counter clockwise direction), the relay led turns clockwise clockwise, when the led has gone out in this position and moistened the sensor (with one After a few seconds or a longer time the relay is activated and the led is on, the wet cloth is removed and blown on the probe and the led and relay stops or s 'Off, vo There, attention! The handling of electricity is dangerous, cut off the current during the connection, good cheeses

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Offline cats

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Re: Mini Humidifier very cheap
« Reply #2 on: August 26, 2017, 11:56:15 AM »
Hi,
As per design, looks like it should be able to do both :)

You have a NO and NC contact on the relay.
I don't know if the sensor is reliable. Looks like a cheap made one.

I started a project of temp / humidity controller but never had a chance to finish it because of life events.
I have so many projects on the shelves :)
Seeing the price of the coolbot, I think I should finish it and share it :)
Missing good cheese here ! Got to make my own :)

Offline Col68

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Re: Mini Humidifier very cheap
« Reply #3 on: August 28, 2017, 05:21:16 PM »
Hi,
As per design, looks like it should be able to do both :)

You have a NO and NC contact on the relay.
I don't know if the sensor is reliable. Looks like a cheap made one.

I started a project of temp / humidity controller but never had a chance to finish it because of life events.
I have so many projects on the shelves :)
Seeing the price of the coolbot, I think I should finish it and share it :)

Hello Cats, thank you for your instructions, yes I tried on NC with a lamp to see the result, the light stays on and off when the green led of the relay is turned on, if you want to control 220V AC power supply module With 12V DC over 150 mA, if you want to power a device with 110V AC, you can power the module in 5V DC, the HR202 sensor responds quickly but not as fast as DHT22 for example, the HR202 captures a humidity of 20% to 95 % This is great, my only problem is the potentiometer that I have trouble to set correctly, thank you for sharing, this module is very cheap, small and with a large power, I desolder the sensor and Offset 30 centimeters it works very well. See you soon.
Let us take care of nature and nature will take care of us

Offline cats

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Re: Mini Humidifier very cheap
« Reply #4 on: August 28, 2017, 09:32:54 PM »
I saw the module sold on DX and others.
Yes it's cheap, but you get what you pay for.
It's to be powered 5VDC not 12 for the ones I checked.
I also had a look at the HR202 humidity sensor, and between 10 and 15˚C, you have around 20% resistor variation. 4.0K to 4.7K
This means that if you change the temperature of the cave, the humidity will not read correctly anymore, until you set it again.

Concerning the potentiometer, you have to set it, wait 5-10 seconds and check if it's ok. Else, turn a little more or less, wait and check again.

Something more reliable with no need of external power, digital, in a box and is around 15 euros.
Search for WH8040 on ebay or else.

There are some things you don't want to be on the very cheap side if you do not want to ruin your cheeses :)

Bon, je parle aussi français hein ! Je suis juste un immigré au pays des caribous.
Missing good cheese here ! Got to make my own :)

Offline Col68

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Re: Mini Humidifier very cheap
« Reply #5 on: August 30, 2017, 10:11:06 AM »
I saw the module sold on DX and others.
Yes it's cheap, but you get what you pay for.
It's to be powered 5VDC not 12 for the ones I checked.
I also had a look at the HR202 humidity sensor, and between 10 and 15˚C, you have around 20% resistor variation. 4.0K to 4.7K
This means that if you change the temperature of the cave, the humidity will not read correctly anymore, until you set it again.

Concerning the potentiometer, you have to set it, wait 5-10 seconds and check if it's ok. Else, turn a little more or less, wait and check again.

Something more reliable with no need of external power, digital, in a box and is around 15 euros.
Search for WH8040 on ebay or else.

There are some things you don't want to be on the very cheap side if you do not want to ruin your cheeses :)

Bon, je parle aussi français hein ! Je suis juste un immigré au pays des caribous.
Thank you very much Cats for your information, I use a mh13001 similar to the wh8040 but the opinions are not very positive, so looking for a solution I find this module good walk, but too cheap it is not too good, j I have 2 of its modules, it takes 20 to 30 seconds or more to open the relay but never less, it is very difficult for me to control this module for stable hygrometry, the only interesting thing is to use it for Humidifier shower room, cheese cave too wet etc ... I can not manage to regulate on 50% moisture, it does not alleviate, it lights up only if moisture extreme raise, then when dry Well goes out, in conclusion not easy for me the setting less than 95% it does not light, damage for this product small and pretty, thank you.

Sa fait plaisir merci pour ta participation et les informations, franchement le seul moyen où j'arrive à faire fonctionner le relais, c'est quand il est au max d'humidité, impossible pour moi de géré par exemple une humidité à 75% par faute de ne pas savoir utilisé le potentiomètre mais grâce à tes infos je vais réessayer en utilisant un multimètre, cordialement. (Pour l'anglais j'utilise un translator, désolé pour les erreurs)
Let us take care of nature and nature will take care of us

Offline cats

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Re: Mini Humidifier very cheap
« Reply #6 on: September 02, 2017, 03:58:16 PM »
Vu le capteur, je pense que c'est un circuit comparateur tout simple.
Missing good cheese here ! Got to make my own :)

Offline Col68

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Re: Mini Humidifier very cheap
« Reply #7 on: September 03, 2017, 05:40:38 PM »
Hi Cats, yes it is a comparator LM393 with 6 pins, I will try to manage the humidity in a small fridge to drink where I will make sausages (Turkish sausages), the probe has been deported what left it all outside and to the probe in the fridge, I found a table of correspondence T ° C and values ​​of humidity, we will see what it will give, in any case thank you for the passage, cordially

Vu le capteur, je pense que c'est un circuit comparateur tout simple.

Salut Cats, oui c'est un comparateur LM393 à 6 broches, je vais essayer de gérer l'humidité dans un petit frigo à boisson oú je vais faire de la charcuterie (saucisses turc), la sonde à été déporté de quoi laissé le tout dehors et juste la sonde dans le frigo, j'ai trouvé un tableau de correspondance T°C et valeurs d'humidité, on verra ce que ça va donner,  en tout cas merci pour le passage, cordialement
Let us take care of nature and nature will take care of us

Offline cats

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Re: Mini Humidifier very cheap
« Reply #8 on: September 04, 2017, 04:42:09 PM »
Nice.
Many analog sensors made in China are too often poor quality, well for what we do.

I prefer to invest a little bit more, on the long run it won't really cost more, as more expensive components are less prone to failure.

Yesterday I began to draw my future temp/RH controller and I should release it under GPL. I made it expendable easily as it uses mostly i2C bus to connect to peripherals.
I need to make a prototype and test it :)
Missing good cheese here ! Got to make my own :)

Offline Col68

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Re: Mini Humidifier very cheap
« Reply #9 on: September 05, 2017, 12:55:14 PM »
Nice.
Many analog sensors made in China are too often poor quality, well for what we do.

I prefer to invest a little bit more, on the long run it won't really cost more, as more expensive components are less prone to failure.

Yesterday I began to draw my future temp/RH controller and I should release it under GPL. I made it expendable easily as it uses mostly i2C bus to connect to peripherals.
I need to make a prototype and test it :)

It is a very good idea if you master the programming Cats, I bought a Arduino (Funduino) Uno R3, a module DHT22, LCD 1602 (shield) with 6 buttons and modules like, clock, Bluetooth, relay 2 channels ... but the problem I do not have a PC, using a tablet and the application ArduinoDroid sela does not work because it says "Compilation error" so I paused to start the project after having acquired a used computer. Since I am an amateur I learn on the Arduino but only to understand it requires a certain level of study :) that I do not have. If you shared your sela experience will be a source for lovers like me, sorry for bothering you with my adventure, my respects to you

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Offline cats

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Re: Mini Humidifier very cheap
« Reply #10 on: September 06, 2017, 07:15:32 PM »
Oh, I do not have so much merit, I began programming microchip pic long time ago in asm then C.
And now I develop projects from time to time with pics again.
Arduino is great as it does not involve a programmer and there are many things available and it's pretty easy to learn, but it's not the best choice when it comes to industrial projects I think because you can not go as bare metal as I have to sometimes.
I should send out the PCB to fabrication next week, so may be at the end of the month I could test a few lines of code :)

Missing good cheese here ! Got to make my own :)

Offline Col68

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Re: Mini Humidifier very cheap
« Reply #11 on: September 07, 2017, 09:07:37 AM »
What a great job Cats, respect to you and I hope a success in your project quite heavy because you manufactured the whole device, you are too strong, bravo. For me it's like an unknown world like Mars :-) but I learned little by little, my main goal was to program the arduino with an OTG compatible Android tablet using the ArduinoDroid application but a compilation error that I can not solve my demotivated, so I bought a Netbook to program, I was advised Raspberry pi in HDMI on television but I am afraid not to succeed and waste my money, in the end it is a good experience to learn technology, thank you for your comments, cordially.

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Offline cats

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Re: Mini Humidifier very cheap
« Reply #12 on: September 07, 2017, 07:50:09 PM »
Raspberry pi can be good some some things, but the processor is from the Arm family, so a little bit different from PCs. They work great for some applications but I would not consider one to be used as replacement of a real computer.
Any used small notebook with a decent core 2 duo or quad and 4Go RAM or more can do the trick for arduino programming, internet, office, mail.
I bought a few HP notebooks like this for the shop here, below 200$. They work fine and I'm not afraid of the guys dropping them.
Missing good cheese here ! Got to make my own :)

Offline Col68

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Re: Mini Humidifier very cheap
« Reply #13 on: September 08, 2017, 11:59:41 AM »
Tank you very much for your information very useful, I will follow your advice and stayed on small PC. Currently I read and download ESKIMON's site in France which helps beginners with understandable explanations for amateurs, it is a great young man whom I like because he shares his open source passion for everyone. I hope to succeed in realizing my project, for now we will make Tomme des Pyrenees, if you want to try the recipe it is with pleasure for me, cordially.

http://eskimon.fr/
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Offline cats

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Re: Mini Humidifier very cheap
« Reply #14 on: September 08, 2017, 09:57:49 PM »
Good !
I don't read a lot about arduino as I'm not really using them, but yes the community is big and helpful.
Missing good cheese here ! Got to make my own :)