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14 points · 8 days ago

“Romanesco broccoli” Brassica oleracea- botrytis group

Brassica oleracea is the same species as other plants like broccoli, cabbage, and cauliflower, all which can interbreed to give rise to more novel forms.

3 points · 15 days ago

Setcreasea purpurea aka Tradescantia pallida

There’s one in the rose section of the horticultural gardens at Michigan State University.

6 points · 20 days ago

Looks like an Alluaudia procera.
:) got one in my window.

5 points · 20 days ago

You'll want to prune the lower leaves and laterals off to staunch the spread of phytophthora capsici. Its a common cucumber pest that destroys the fruit and is vectored by water.

5

Hi, I'm studying horticultural science at MSU, and am minoring in entrepreneurship.
In a program I'm taking part in I'm to gather some market research pertaining a potential product. I need to get 25 people to fill out a survey in order to get access to some 3D printers.
I'd really appreciate anyone taking the time to help me out!

Link to survey: https://www.surveymonkey.com/r/8YDBBRR

Thanks for your time! You've helped bring to life a concept I've been working hard to make real.

5
comment
0

Hi, I'm studying horticultural science at MSU, and am minoring in entrepreneurship.
In a program I'm taking part in I'm to gather some market research pertaining a potential product. I need to get 25 people to fill out a survey in order to get access to some 3D printers.
I'd really appreciate anyone taking the time to help me out!

Link to survey: https://www.surveymonkey.com/r/8YDBBRR

Thanks for your time! You've helped bring to life a concept I've been working hard to make real.

0
comment
26

Hi, I'm studying horticultural science at MSU, and am minoring in entrepreneurship.
In a program I'm taking part in I'm to gather some market research pertaining a potential product. I need to get 25 people to fill out a survey in order to get access to some 3D printers.
I'd really appreciate anyone taking the time to help me out!

Link to survey: https://www.surveymonkey.com/r/8YDBBRR

Thanks for your time! You've helped bring to life a concept I've been working hard to make real.

26
14 comments
7

Hi, I'm studying horticultural science at MSU, and am minoring in entrepreneurship.
In a program I'm taking part in I'm to gather some market research pertaining a potential product. I need to get 25 people to fill out a survey in order to get access to some 3D printers.
I'd really appreciate anyone taking the time to help me out!

Link to survey: https://www.surveymonkey.com/r/8YDBBRR

Thanks for your time! You've helped bring to life a concept I've been working hard to make real.

7
6 comments
1

Hi, I'm studying horticultural science at MSU, and am minoring in entrepreneurship.
In a program I'm taking part in I'm to gather some market research pertaining a potential product. I need to get 25 people to fill out a survey in order to get access to some 3D printers.
I'd really appreciate anyone taking the time to help me out!

Link to survey: https://www.surveymonkey.com/r/8YDBBRR

Thanks for your time! You've helped bring to life a concept I've been working hard to make real.

1
comment
8

Hi, I'm studying horticultural science at MSU, and am minoring in entrepreneurship.
In a program I'm taking part in I'm to gather some market research pertaining a potential product. I need to get 25 people to fill out a survey in order to get access to some 3D printers.
I'd really appreciate anyone taking the time to help me out!

Link to survey: https://www.surveymonkey.com/r/8YDBBRR

Thanks for your time! You've helped bring to life a concept I've been working hard to make real.

8
7 comments
4

Hi, I'm studying horticultural science at MSU, and am minoring in entrepreneurship.
In a program I'm taking part in I'm to gather some market research pertaining a potential product. I need to get 25 people to fill out a survey in order to get access to some 3D printers.
I'd really appreciate anyone taking the time to help me out!

Link to survey: https://www.surveymonkey.com/r/8YDBBRR

Thanks for your time! You've helped bring to life a concept I've been working hard to make real.

4
1 comment
5

Hi, I'm studying horticultural science at MSU, and am minoring in entrepreneurship. In a program I'm taking part in I'm to gather some market research pertaining a potential product. I need to get 25 people to fill out a survey in order to get access to some 3D printers. I'd really appreciate anyone taking the time to help me out!

*Update * Link to survey: https://www.surveymonkey.com/r/8YDBBRR

Thanks for your time! You've helped bring to life a concept I've been working hard to make real.

5
3 comments
-2 points · 1 month ago

I took air force ROTC in highschool, we were supposed to study aerodynamics, instead we learned this, marched, and watched the entirety of band of brothers...twice.

They don’t teach aerodynamics in high school ROTC.

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Exactly. We had the books for it, our Sargent and Colonel used to say things like “if everyone doesn’t shut up I’m going to make you read these like you’re supposed to”.

Original Poster2 points · 1 month ago

Science! Thanks for sharing that. Now I'm worried that my plant is sick and contagious. Lol

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2 points · 1 month ago

I'm a horticulture science major, I couldn't help chiming in ha. Don't worry, it's a natural phenomenon brought on by environmental conditions, its not harmful or contagious, just abnormal looking. Look up some pictures, they're pretty neat, all plant parts can become fasciated.

1

Thanks everyone in advance for your time.

I’m trying to control 4x 12vdc 80mA motors with PWM through a mosfet on my Arduino mega. I managed to get two working, but when I try to power the third, none of them work. I’m providing power to the motors from via a 12vdc 1500 mA wall wort. I have capacitors and diodes on the load terminals to smooth current and direct back emf, and pull down 10k resistors tied from gate to drain (ground) on my mosfets.

So I’m wondering why am I not able to control more than 2 motors at once, and how can I fix this?

Thank you for your help!

1
4 comments

Hey man, you specified in the description that you have a pull down resistor in parallel from gate to drain. That would be a pull up resistor if it's an N-Channel Mosfet. If it were an N-Channel Mosfet, you need to connect the source to ground. Watch out carefully

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Original Poster1 point · 1 month ago

Whoops, wrote that out wrong, I have the resistor from gate to source, and source tied to ground. I’m using IRLB8721’s.
Turns out my motors draw way more current then advertised. I used a power source that could handle more current and got all 4 to run.

Original Poster1 point · 1 month ago · edited 1 month ago

They seem to be attempting to work when 3 are plugged in, but it's hardly even audible. I'm trying to get the motors to run in response to the output of a flow meter. I'm working towards having them scale their speed based on the rate of flow, but for now I'm just trying to get them to all turn on when there is flow, and off when there is not.

CODE:

int flowPin= 19; //Pin that the flow sensor is connected to.

double flowRate; //Variable for storing the rate of flow

volatile int count; //This interger needs to be set as volatile to ensure it updates correctly during the interrupt process.

void setup() {

pinMode(6,OUTPUT);

pinMode(9,OUTPUT);

pinMode(10,OUTPUT);

pinMode(11,OUTPUT);

pinMode(flowPin,INPUT);

attachInterrupt(digitalPinToInterrupt(19),flow, RISING);

Serial.begin(9600);

}

void loop() {

count = 0; //Resets flow meter

interrupts(); //Enables interrupts on the arduino

delay(100);

noInterrupts(); //Disables interrupts

flowRate = ((count * 2.25)*60)/100; // conversions for volume/time.

Serial.println(flowRate);

if (flowRate>1){

analogWrite(6,255);

analogWrite(9,255);

analogWrite(10,255);

analogWrite(11,255);

}

if (flowRate<1){

analogWrite(6,0);

analogWrite(9,0);

analogWrite(10,0);

analogWrite(11,0);

}

}

void flow()

{

count++; //Every time this function is called, incrament "count" by 1.

}

2

Thanks everyone in advance for your time.

I’m trying to control 4x 12vdc 80mA motors with PWM through a mosfet on my Arduino mega. I managed to get two working, but when I try to power the third, none of them work. I’m providing power to the motors from via a 12vdc 1500 mA wall wort. I have capacitors and diodes on the load terminals to smooth current and direct back emf, and pull down 10k resistors tied from gate to drain (ground) on my mosfets.

So I’m wondering why am I not able to control more than 2 motors at once, and how can I fix this?

Thank you for your help!

2
6 comments

80mA seems low for a 12V DC motor. Did you actually measure this value? Maybe your motors draw much more than that - especially at startup and if they are not freely moving - and your adapter can't source enough power. I'd try measuring the consumption of a single motor unless of course you already did that.

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Original Poster2 points · 1 month ago

I’ve honestly yet to need to measure current, so took the advertised 80 mA on the sellers Amazon page on faith.
I just measured them, and they were running around 440mA, with an initial current around 500mA.
Lesson learned, thanks for pointing that oversight out. I’ll have to get a power source capable of outputting more current, hopefully that’ll end the circuit debugging so I can get back to the code.

Original Poster1 point · 1 month ago

They seem to be attempting to work when 3 are plugged in, but it's hardly even audible. I'm trying to get the motors to run in response to the output of a flow meter. I'm working towards having them scale their speed based on the rate of flow, but for now I'm just trying to get them to all turn on when there is flow, and off when there is not.

CODE:

int flowPin= 19; //Pin that the flow sensor is connected to.

double flowRate; //Variable for storing the rate of flow

volatile int count; //This interger needs to be set as volatile to ensure it updates correctly during the interupt process.

void setup() {

pinMode(6,OUTPUT);

pinMode(9,OUTPUT);

pinMode(10,OUTPUT);

pinMode(11,OUTPUT);

pinMode(flowPin,INPUT);

attachInterrupt(digitalPinToInterrupt(19),flow, RISING);

Serial.begin(9600);

}

void loop() {

count = 0; //Resets flow meter

interrupts(); //Enables interupts on the arduino

delay(100);

noInterrupts(); //Disables interrupts

flowRate = ((count * 2.25)*60)/100; // conversions for volume/time.

Serial.println(flowRate);

if (flowRate>1){

analogWrite(6,255);

analogWrite(9,255);

analogWrite(10,255);

analogWrite(11,255);

}

if (flowRate<1){

analogWrite(6,0);

analogWrite(9,0);

analogWrite(10,0);

analogWrite(11,0);

}

}

void flow()

{

count++; //Every time this function is called, incrament "count" by 1.

}

Load more comments

This looks like Guttation, which is when some vascular plants exude sap from the pores in their leaf tips or edges. This often occurs during cool nights and is not to be confused with dew. The most common way to see this phenomenon is to get up early after a cold night and look for the droplets of water on the very tips of grass blades on your lawn.

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Dropped in to say this ^ A botany professor I had talked about this.

My mom used to put begonia flowers in our salads.

Over the last few days I put together a small herb garden (well, two, one for herbs that prefer more water and ones that prefer less) and now that they're getting started, I'm back to thinking about fiddling with my devkits again.

What do you think one of the easier (I'd like to learn about the horticulture WHY as well as just keep these stats) to grasp statistic would be for me to put together a board and start plotting?

Thanks again!

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Original Poster1 point · 2 months ago

If you're looking for stats beyond temp and humidity, I'd probably start with electrical conductivity. You can do a cheap DIY, but that requires a bit of circuit design knowledge. Atlas scientific makes some quick but expensive options to get you up and running with EC and other parameters like pH on development boards line the Arduino.

There's a lot of info out there on species interaction with varied EC levels. On average plants that are more drought tolerant have adaptations to higher a EC. Some growers recommend around 1.0 for juvenile crops, and increasing gradually to 2.0 as they mature. Some crops need more or less than that, but that's a decent guideline if you don't know how heavy of a feeder your crop is.

Interesting!

I actually do have board design experience so i might look that up. Im going to have to look at what some of these things are more in depth, but i have a few of the air/humidity combo sensors, I assume one setup of those for a general area is enough? I would imagine one per plant or pot might be exccessive but I'm not positive.

see more
Original Poster1 point · 2 months ago

One to a few is good for an area. Micro-zones can be of concern, but humidity and temp only vary so much within an area as small as a plant. Another thing you might want to explore is measuring the temp of the plant itself with IR.

If you're experienced enough with circuit design, there's some pretty accurate soil moisture sensors that use time domain reflectometry and can also determine EC + temp.

Load more comments

In this vid a new probe is discussed (second half of vid) that doesn't rely on a semi permeable glass bulb, and wouldn't need recurrent calibration.

https://m.youtube.com/watch?list=LLBOMDAAXD3pL0BiaW9hdlAQ&v=P1wRXTl2L3I

My mother taught me native American paganism growing up. One of my birthdays she gave me a wolf pelt and told me this story.
That pelt now lays across the end of my bed, and is one of the first things I see every morning to remind me.

0

Hi everyone, I’m attempting to build a time domain reflectometer to determine the di-electric permittivity (ϵ) of soil samples. This is useful as it’s an electrical property of soil that is relatively independent of the electrical conductivity, pH, temperature, and structure of the soil but highly dependant on volumetric water content. I'm getting my info from a few different publications, but if you want to know more on the topic look into Topp et. al., his work is cited a lot. I was wondering if anyone has any experience or direction they may be willing to offer when it comes to construction of some of the components. The circuit mainly consists of a step function generator (1Mhz-1Ghz), a sampling receiver, and a wave guide. I read that the propagation velocity (V; in m/s) down the wave guide correlates to ϵ by this function:
ϵ=(C/V)2.
C is the speed of light (~3x108 m/s). I’m tackling the step function generator first but I haven’t worked with wave functions yet and don’t own an oscilloscope. Any direction would be greatly appreciated.

0
2 comments

An AVR chip does not sample fast enough. Look to the data sheet on the ADC (Analog to digital converter) I think it works up to 250khz or 500khz

This is not even mhz, or ghz, so trying to sample a 1ghz signal with a device that can only read in the khz or 0.5mhz means the wave would cycle multiple times hundreds or thousands for each sample you took.

There are 3rd party componets you could use but then you run into another problem which is data bandwidth. The Arduino cannot crunch that many numbers quickly because it runs to slow.

You need to look into something like a raspberry pi etc to take accurate samples of a wave osculating that quickly.

http://yaab-arduino.blogspot.com/2015/02/fast-sampling-from-analog-input.html

The link above they were able to get to 615khz with some cool hacks. Not even 1 mhz which is 1,000 times slower than 1ghz.

  • the above link is the best overall link I could find for you. If you have other questions please ask we will try to help you out.
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Original Poster1 point · 2 months ago

Thanks for your reply, I have much to learn. I suppose it's about time I venture into the realm of raspberry pi.

4

I'm attempting to control a 12vdc 80ma motor via a PWM output from my Arduino.
I have only two transistors types on hand, both seem poorly suited to the task as they get quite hot. They are PN2222a and S8050 npn transistors. The S8050 powered the motor, but not at low pwm, and at 255 its rpm was lower than when hooked right up to 12vdc. When given a low pwm, the motor didn't spin and made a high pitched hum.

I've read that bipolar transistors regulate current, and not voltage, and if I want to regulate voltage (with a lower drop across the transistor) I'll need an n-channel MOSFET. Looking at these, the various choices and specifications are mind boggling.

Might anyone be willing to assist me in choosing an N-channel MOSFET for controlling my motor (12v. 0.8ma) using 5v logic at the gate?

I appreciate your time and help! Thanks!

4
6 comments

Grapes, called fox grapes when found growing wild because they've hybridized with wild non cultivated varieties. They come in many varieties. I believe the lobes indicate it's a vitis labrusca variety. You can tell a lot on grapes heritage by the leaf morphology.

u/Warp101
Karma
465
Cake day
January 14, 2018
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