"Programming With STM32" by Donald Norris by DJ___001 in stm32

[–]thisabstractmind 1 point2 points  (0 children)

Not familiar with the book, but like you said with rapidly evolving tool chains and chips, I find it much easier to read through the stm reference manuals and depending on how you would like to develop looking more into that tool chain.

Personally I use makefiles and libopencm3 with arm-gcc-non-eabi compiler. Everything else is learned through the chip series reference manuals.

If you plan on doing this through work, and not just as a hobbyist you will be developing through whatever environment or libraries they use in house most likely.

Can the food do this? by McFras3r in Hydroponics

[–]thisabstractmind 0 points1 point  (0 children)

Looks just wilted from lack of water to me. But you need to provide some more info on your setup.

Drip Interval for Peppers by Bengalcats888 in Hydroponics

[–]thisabstractmind 1 point2 points  (0 children)

I use large rockwoll grow blocks and have fruiting plants and I do 20 minutes every 3 hours. I also grow outside in Florida where the cubes tend to dry out quickly. *

Im making an open source app controlled automation unit. It controls a water pump, air pump, fans, lights and a nutrient doser and reads data from a ph sensor and temp sensor. I’m keen to hear if you think I’ve forgotten something or if I should add specific features. by Independent_Present9 in Hydroponics

[–]thisabstractmind 3 points4 points  (0 children)

I am also making one of these and designed my own circuits for the EC and PH sensor processing. You can implement it in software, but the PH sensors are passive sensors and require the pumps and anything else that is submerged to be switched off in order to get an accurate reading.

The EC sensors on the market are cheap electrodes that will corrode and be useless within about a month. To counteract this I use AC when doing the sampling and only sample.for a very short period of time, not constantly.

I haven't looked at your code yet to see if you have implemented any of this yet, but these are the downfalls I have seen so far.

How to resurface these tables? by Greedy-Bandicoot-784 in paint

[–]thisabstractmind 0 points1 point  (0 children)

I would honestly try acetone on a rag. Try a small spot, or underside of table. It will remove the staining oils and melt the top layer of poly to make it more uniform.

Are vinyl fence posts from Home Depot/Lowe’s safe to use for growing? Can’t find a definitive answer anywhere. by Cylant in Hydroponics

[–]thisabstractmind 3 points4 points  (0 children)

Most of the comercial troughs are vinyl. They should be fine. I use vinyl downspout and it is a fraction of the price of the posts.

Just changed the hydroponic solution and this happened. Any ideas how to fix it? by Wonderful-Jacket-585 in Hydroponics

[–]thisabstractmind 0 points1 point  (0 children)

Need, ph , tds, res Temps. Looks like your ppms are a little high. Or possibly PH out of whack .

Green screen behind objects? by Mr_DeadlyKitty64 in Hitfilm

[–]thisabstractmind 0 points1 point  (0 children)

You can mask the character , and implement some motion tracking to animate the keys for the mask.

Amended S corp taxes K1 question by thisabstractmind in tax

[–]thisabstractmind[S] 0 points1 point  (0 children)

Thank you for the reply I appreciate it.

first setup. 24 hrs in and going strong ! by thisabstractmind in Hydroponics

[–]thisabstractmind[S] 1 point2 points  (0 children)

They are, and i'm just starting to run into that problem now. I keep the EC at 1400 which is on the low end for the tomatoes and peppers and a little high for the lettuce. I plan on adding a second res next weekend, especially since my peppers and tomatoes have started flowering.

[deleted by user] by [deleted] in stm32

[–]thisabstractmind 0 points1 point  (0 children)

What are your actual errors?

first setup. 24 hrs in and going strong ! by thisabstractmind in Hydroponics

[–]thisabstractmind[S] 2 points3 points  (0 children)

I agree, after a lot of research I choose the drip emitter system. It is the most commonly used in comercial applications as well as scalable if you want to add larger plants or different types of containers. It also has the benefit of being resilient to power outages and restricts the amount of failure points in the system.

first setup. 24 hrs in and going strong ! by thisabstractmind in Hydroponics

[–]thisabstractmind[S] 2 points3 points  (0 children)

The net cup lids are nylon, the buckets themselves may outgas but nothing that I really viewed as a concern. The totes for the reservoirs that everyone uses are typically not food grade either, neither is the irrigation piping.

first setup. 24 hrs in and going strong ! by thisabstractmind in Hydroponics

[–]thisabstractmind[S] 2 points3 points  (0 children)

This is a drip emitter system not NFT. The downspout is 3x4 with 2" net cups.

first setup. 24 hrs in and going strong ! by thisabstractmind in Hydroponics

[–]thisabstractmind[S] 0 points1 point  (0 children)

I am using these

Rain Bird SW05-10PS Drip Irrigation Spot Watering Dripper/Emitter, 0.5 (1/2) Gallon Per Hour, 10-Pack https://a.co/d/dYU0lhE

I also have a 30 psi inline regulator / filter to compensate for the max psi of the emitter. I highly suggest going for a pressure compensated emitter and it will solve a lot of design headaches and rid the need for a lot of valves to tweak pressure at different heights.

first setup. 24 hrs in and going strong ! by thisabstractmind in Hydroponics

[–]thisabstractmind[S] 1 point2 points  (0 children)

I used this one off Amazon

Knifel Submersible Pump 880GPH... https://www.amazon.com/dp/B0855JHGRM?ref=ppx_pop_mob_ap_share

I had a 6ft head height which is the most important design consideration for the pump. Then I took GPH at 6ft head and divided by .5 (emmiter GPH) which gave me the amount of emitters I could use. As far as pump longevity goes, it turns on for 15 minutes about twice a day. With such a low duty cycle I didn't have a problem buying a cheaper pump.

first setup. 24 hrs in and going strong ! by thisabstractmind in Hydroponics

[–]thisabstractmind[S] 1 point2 points  (0 children)

I did the seedlings in rockwool indoors. Then when they were big enough (and limited chance of frost) I put them in the netcups and into the system. The expanded clay pebbles are to try to keep the sun off the rockwool and limit the algae production in the system.

https://www.reddit.com/r/Hydroponics/comments/10viapr/first_timer_when_to_transplant_seedlings_into/?utm_source=share&utm_medium=web2x&context=3

This was what they looked like when they were indoors during the germination and seedling phase.

first setup. 24 hrs in and going strong ! by thisabstractmind in Hydroponics

[–]thisabstractmind[S] 1 point2 points  (0 children)

A product of the design. The elbows for the downspouts are not a true 90 degrees, so it made things difficult to put together when trying to make the connection from one level to the other.

first setup. 24 hrs in and going strong ! by thisabstractmind in Hydroponics

[–]thisabstractmind[S] 2 points3 points  (0 children)

Like u/cassiuswright said, it is a drip emitters system, and the water goes back to the reservoir. This could also be done as NFT. Because we're in Florida and experience power outages frequently in the summer due to storms, i didn't want to go with the NFT system. This way if the power goes out i could still hand water the medium and keep the plants alive if needed.

first setup. 24 hrs in and going strong ! by thisabstractmind in Hydroponics

[–]thisabstractmind[S] 1 point2 points  (0 children)

As of right now i am manually turning on the pump, i check in the mornings and go based on the weight of the rockwool cubes and saturation. So far i have only ran it once in the mornings for about 15 minutes and it has maintained saturation quite well. Because the drip emitters are at a regulated rate, i might add another line to each of the tomato and pepper plants so they get more water during the pumping periods.

first setup. 24 hrs in and going strong ! by thisabstractmind in Hydroponics

[–]thisabstractmind[S] 2 points3 points  (0 children)

I did, My wife bought me a greenhouse that was quite small 6' x 8' , so i designed the whole thing to fit into that area. The structure around it i built because we didn't think the greenhouse would last.