A wall-mount phytoplankton grower with Arduino #Arduino #FromTheForums #Biology

On the Adafruit Forums, user hydrophyte shares a fascinating project:

This is a phytoplankton culture setup in a wall-mount clear plastic cylinder with additional brackets holding electronics enclosures + air pump. This kind of affordable small air pump tends to wear out fast, so it runs just one minute per hour: probably adequate for occasional stirring of this easy phytoplankton culture.

Phytoplankton is the extreme halophile, Dunaliella salina. In good growing conditions, D. salina can produces lots of beta carotene pigment and tint the salty water with a bright orange or red coloration. I have seen this same culture glow with an amber-orange hue, but tonight it’s just plain green.

This is a simple setup just with an RTC, 7-segment clock and relay. I didn’t really need all the pins for this one, but I like using the Metro Mini very much. It runs just like a regular Uno and never gives me any trouble.

really like that white 7-segment clock display. It looks cool.

The RGB LED strip behind the clear tube can shine with many different colors. The white 1W LED at the top renders better phytoplankton coloration in photos.

An advantage of keeping this particular phytoplankton in this kind of low-maintenance setup is that the hypersaline conditions (more then twice as salty as seawater!) will tend to exclude Bacteria and other Algae that could otherwise contaminate and foul the culture.

See more pictures in the post here.


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 35,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org


Maker Business — Chip inventories rise as demand falls

Wearables — How to attach a battery to your next wearables project

Electronics — Check out this shorthand shortcut

Python for Microcontrollers — Python on Microcontrollers Newsletter: 400 CircuitPython Libraries, 3m Thanks and much more! #CircuitPython #Python @ThePSF @micropython @Raspberry_Pi

Adafruit IoT Monthly — 2022 in Recap!

Microsoft MakeCode — MakeCode Thank You!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — NEW PRODUCT – Adafruit ESP32-S2 Reverse TFT Feather

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.