homemade automatic KH Tester With Opensource.

[axlzys]

hello everyone,
I made a KH tester machine at home.Control with Raspberry Pi.
For the benefit of aquarists around the world, I decided to open source it.
I upload all details to the github.com, here it is : https://github.com/axlzys/KH-Tester

The case made by 3D Print,
The print time of main body and front cover are more than 10 hours, you may need a encloses naturally 3D printer.

About test accuracy:The test accuracy is 0.1dkh,and with 2 month tested,it has 0.1-0.3 difference from Hanna.

If you have any questions. Please tell me.

Here is some pics of this DIY

 

[GoVols]

Can you post some shots of its interface software?

Can you recalibate the pumps and save the results with its interface?

 

[axlzys]

Can you post some shots of its interface software?

Can you recalibate the pumps and save the results with its interface?

of couse i can
In the software i can recalibate PH probe(4.0 7.0),recalibate the volume of reaction chamber,and recalibate flow of reagent pump ,and save the results in SQL.
but my english is trouble,maybe i use the wrong words in website.
here is PIC:

 

[GoVols]

of couse i can
In the software i can recalibate PH probe(4.0 7.0),recalibate the volume of reaction chamber,and recalibate flow of reagent pump ,and save the results in SQL.
but my english is trouble,maybe i use the wrong words in website.
here is PIC:

Thank you

Understand that it's in a foreign language, at this point.

------------------------------------------------------------------------------

Lol
Your real trick is clicking on your location...... other.... button

Too funny...

 

[axlzys]

Thank you

Understand that it's in a foreign language, at this point.

------------------------------------------------------------------------------

Lol
Your real trick is clicking on your location...... other.... button

Too funny...

you mean i have two language in one button?in fact,my html files is very terrible,i can't make an Multi-language pages.

 

[GoVols]

you mean i have two language in one button?in fact,my html files is very terrible,i can't make an Multi-language pages.

Lol
When I click your Location....... other...... it shows my home town's map

Priceless... ;Hilarious

 

[axlzys]

Lol
When I click your Location....... other...... it shows my home town's map

Priceless... ;Hilarious

maybe i’m in mars

 

[beridius]

Hi Great Project,

do you have a parts list and diagram?

 

[axlzys]

Hi Great Project,

do you have a parts list and diagram?

yes. you can see it in github website.the file named BOM is parts list.
but i am in chinese, some of parts like motor driver,pump, PH probe i used. i can buy easy in Taobao. I don't know if it is difficult to buy these prats in other countries. i try my best find them in ebay.com or aliexpress.com.

especially the motor hat, maybe you can use the ADafruit motor hat,if you can change the code(about Raspi GPIO number)

 

[axlzys]

Hi Great Project,

do you have a parts list and diagram?

And the file named 'KH Tester(ENGLISH-Google translated).pdf',is the detailed assembly steps, wiring diagram, software and how to use.

 

[beridius]

Sorry did not see BOM file many thanks.

 

[iLMaRiO]

Which pumps do you use ?
Could you please post the print orientation for the box and it's supports ?

 

[axlzys]

Which pumps do you use ?
Could you please post the print orientation for the box and it's supports ?

i reply you in github.
kfs 12V two slowdown gear （B06）for acid and NKP S10 for water，
in the file BOM.xlsx there are two sheets one is in english,
for the 3d print setting i write it in pdf file.
you need use supports and the flow of supports you can set 70%

 

[iLMaRiO]

which orientation for the body and supporta where?

 

[gbroadbridge]

i reply you in github.
kfs 12V two slowdown gear （B06）for acid and NKP S10 for water，
in the file BOM.xlsx there are two sheets one is in english,
for the 3d print setting i write it in pdf file.
you need use supports and the flow of supports you can set 70%

Thanks, I saw this when you first posted it.

I'm just still waiting for some parts

 

[iLMaRiO]

@axlzys if you split the body in 2 parts to screw together, you can print both lay on the bottom and without supports.
just split in two and make the screw holders a single piece from the top, to the bottom.

just to give you an idea. thinkercad isn't able to import this stl properly so I can't modify it.

 

[axlzys]

@axlzys if you split the body in 2 parts to screw together, you can print both lay on the bottom and without supports.
just split in two and make the screw holders a single piece from the top, to the bottom.

just to give you an idea. thinkercad isn't able to import this stl properly so I can't modify it.

@axlzys if you split the body in 2 parts to screw together, you can print both lay on the bottom and without supports.
just split in two and make the screw holders a single piece from the top, to the bottom.

just to give you an idea. thinkercad isn't able to import this stl properly so I can't modify it.

maybe its a good idea. please wait a moment, i am outside, when i am back home, i will upload .prt file to the github.
you can modify by yourself.

 

[axlzys]

@axlzys if you split the body in 2 parts to screw together, you can print both lay on the bottom and without supports.
just split in two and make the screw holders a single piece from the top, to the bottom.

just to give you an idea. thinkercad isn't able to import this stl properly so I can't modify it.

I have uploaded STP and prt file to github.

 

[iLMaRiO]

thank you

 

[axlzys]

Thanks, I saw this when you first posted it.

I'm just still waiting for some parts

welcome.
if you have any questions about ssembly, please tell me.