Hanna Checker Cuvette Mixer

[Brewtoszek]

Hey Fellow Reefers,

I wanted to share a cuvette mixer I made to mix the dry Hanna Checker reagents. I use this for the phosphate checker (2 min mix time), and the Calcium checker (15s mix).

It runs off of 2 AA batteries, there is a voltage boost board to get the ~3V battery voltage up to the operating range of an Arduino nano. The nano is connected to a micro-servo which rotates the cuvette back and forth 180 degrees before stopping after 2 mins. Spend more time reefing and less time mixing!

 

[WIReefer]

Awesome man! Looks great

 

[theatrus]

Hey Fellow Reefers,

I wanted to share a cuvette mixer I made to mix the dry Hanna Checker reagents. I use this for the phosphate checker (2 min mix time), and the Calcium checker (15s mix).

It runs off of 2 AA batteries, there is a voltage boost board to get the ~3V battery voltage up to the operating range of an Arduino nano. The nano is connected to a micro-servo which rotates the cuvette back and forth 180 degrees before stopping after 2 mins. Spend more time reefing and less time mixing!

I won't be the first to say it, but shows us the insides :-D

 

[theatrus]

[edit removed - post got duped]

 

[Brewtoszek]

Here are a few pics of the inside. The wire lengths are close but could certainly use some adjustment to clean it up a little.

 

[Bryknicks]

I like the drying rack and holding containers you made in the background of the video posted. Figuring you made them yourself, do you sell any?

 

[Reefing_addiction]

Hey Fellow Reefers,

I wanted to share a cuvette mixer I made to mix the dry Hanna Checker reagents. I use this for the phosphate checker (2 min mix time), and the Calcium checker (15s mix).

It runs off of 2 AA batteries, there is a voltage boost board to get the ~3V battery voltage up to the operating range of an Arduino nano. The nano is connected to a micro-servo which rotates the cuvette back and forth 180 degrees before stopping after 2 mins. Spend more time reefing and less time mixing!

So I want one! Or teach us how to make it?

 

[Reefing_addiction]

I like the drying rack and holding containers you made in the background of the video posted. Figuring you made them yourself, do you sell any?

I second this!
I bet 3D printed.
Man I need a 3D printer!

 

[Brewtoszek]

thanks all, yes the drying rack and the organizer trays are 3D printed, i designed them and printed on my Prusa Mk3. I wanted something that was low profile so i could fit in a drawer, i added the text on the top printed in a second color just for better visibility. I've still got to make a tray for my PH checker and Nitrate checker which should be on the way soon. I went back and forth with whether or not to put them all on 1 tray or individuals, ultimately went individual just so if it only wanted to run a particular test it would be easier to get out and put away.

I have not sold any although i could, send me a message and we can work something out. Also happy to teach you how to make them if you'd like. 3D printer is a great addition to this hobby!

 

[LetItReef]

Awesome work!

 

[KWT]

Looks great, I have been checking out 3D printers and things to make. I like what you have done here, and I have some of the Hanna equipment ordered. The Prusa is one of the printers I am interested in. If you don’t mind I may have some questions for you

 

[theatrus]

Here are a few pics of the inside. The wire lengths are close but could certainly use some adjustment to clean it up a little.

That’s super clever - hadn’t thought to use one of those micro servos for something like this. Good quality 3D print too!

 

[Brewtoszek]

Looks great, I have been checking out 3D printers and things to make. I like what you have done here, and I have some of the Hanna equipment ordered. The Prusa is one of the printers I am interested in. If you don’t mind I may have some questions for you

Absolutely don't mind, happy to talk 3D printers anytime. Somebody was asking about printers last week and i shared some of my thoughts, link to that here https://www.reef2reef.com/threads/3d-printer.760369/post-8002933

 

[Urtoo]

Happen to share gcode or the stl?
this is amazing looking. Better than the one I use from the looks

 

[Brewtoszek]

Happen to share gcode or the stl?
this is amazing looking. Better than the one I use from the looks

I'm assuming you mean the cuvette rack, but if not let me know and i can post others. Here is an STL for the rack, let me know how it works out for you or if you've got any questions!

 

[KWT]

I want one of those, leaning farther and farther to getting a printer

 

[Urtoo]

Thanks for the cuvette stl.
Are you going to share the other device and holders? This really has me looking at my small trays, looking at those that you made, they just look beefier. And we have the same checkers, I have PH, Alk, PO4, and Calcium. The Nitrate is ordered and back stocked from Hanna. I was only 40 minutes later after their announcement of availability, so hoping they restock quickly.

Since you seem to have the same mindset as I do, I highly recommend this:


Super precise for the 20 or so tests I have run. Before this I used the plunger type that are everywhere. This helps to get the meniscus to the perfect spot, and repeatable!

 

[Michael Gray]

maybe u should sell me one because i dont have 3d printer lol and dont plan on one because i dunno how to use one or no ideas to make lol

 

[MikeTheNewbie]

What design software do you use? Mind sharing the source files for remixing?

 

[gregor]

Hey Fellow Reefers,

I wanted to share a cuvette mixer I made to mix the dry Hanna Checker reagents. I use this for the phosphate checker (2 min mix time), and the Calcium checker (15s mix).

It runs off of 2 AA batteries, there is a voltage boost board to get the ~3V battery voltage up to the operating range of an Arduino nano. The nano is connected to a micro-servo which rotates the cuvette back and forth 180 degrees before stopping after 2 mins. Spend more time reefing and less time mixing!

Good afternoon.
You can ask you for stl files for making a mixer. Code file for UNO. And an assembly diagram of electrical components.
I liked the idea very much, I want to do the same for myself.