Currently, I have a MaxYeilds bin.
- I have tossed the sponge filters it came with and installed (4) 12VDC 2" 3d printer fans on the side holes. The came with mounting plates and filters as well, allowing me to pop them off and clean or replace filters and snap them back on. The air flow is designed to circulate; front right is intake/back right is exhaust, front left is exhaust/back left is intake. They are wired in series to a single 2-pin JST plug (12V/GND)
- Inside the top portion of the bin is a 5VDC ARGB LED strip with a water resist rating of IP67 (can be submerged) circling the top edge and a small hole was drilled to allow wire out, then filled is silicone. The LED strip is wired to a single 3pin JST glug (5V/DATA/GND).
- Inside the top portion of the bin in the center are 2 I²C sensors, SHT-31 and SCD-41. SHT-31 provides relative humidity with an accuracy of ±.08% and temperature with an accuracy of ±.02ºF. SCD-41 provides CO₂ levels between 0-6000ppm with an accuracy of ±400ppm. these are both wired together to a single JST plug (they have separate address busses so they don't conflict)
- I have a 1" hole drilled on the top right corner of the top bin portion and a flex hose attached to the bin and a 120VAC cold mist reptile fogger. the standard outlet plug was cut off and rewired to a rated c8 plug (xbox / ps5 / laptop two hole connector)
THIS IS WEAR IT GETS COMPLICATED
- the LED Strip, (4) Fans, and fogger are all wired to separate relays
- the relay is wired to an Arduino NANO ESP32
- there is a lot more wiring involved, but its not relevant at this point; 120VAC -> 12VDC transformer, DC-DC Buck Converter, logic level shifters, etc. If you are interested in making this, I can provide the complete wiring guide later and the full code I wrote for my arduino. but right now this is what it does:
- retrieves current date and time
- at 8:00am, the relay will trigger the led strip turn on at the color 191, 255, 0, which is 480nm wavelength. according to Paul Staments, this is the perfect color for Psilocybe Cubensis. at 8:00pm, the relay will cut off led strip.
- The SCD-41 and SHT-31 will be providing CO₂, temperature, and relative humidity (RH) to the Arduino every second. If the RH drops below 93%, the relay will trigger the fogger to turn on, the fogger will stay on until the Arduino reads a RH of 98% or greater. If the Arduino reads a CO₂ level of 1000ppm or greater, the relay will trigger the fans until the CO₂ level reads 400ppm or less.
This is an automated growing chamber using an Arduino NANO and Paul Staments recommended fruiting parameters coded to reacted and adjust the environment to maintain the optimum growing conditions even while I'm at work. Arduino has an IOT service with a dashboard and widgets. The app is in Apple App Store and Google Play. I can watch my grow tub and see its current conditions in real time anywhere through my phone. I have provided a screenshot of my dashboard 
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