How to use Vegetronix soil moisture sensor (VG400) on Arduino
15.3 years ago arduino, moisture sensor
With the summer starting to come to a close it has been time for me to start thinking back to the computerized grow box. I have been doing some considerable work on the electronics and software over the summer. Better to break stuff while the plants are outside and not while killing them inside.
Though I have been happy with my homemade gypsum soil sensors I decided to try out a commercial option hoping for better accuracy and longer life. This is important with my current plans to include automatic watering to the latest version of my grow box. Don’t want to wake up to a flood in the garage due to a broken sensor. After some looking I came across the Vegetronix VG400 which measures the dielectric constant of the soil using transmission line techniques. Which I have no idea what that means but sounds impressive.
The hookup couldn’t be simpler, red wire to 3V, bare wire to ground, and black wire to an analog input. As you can see below in my completely not to scale diagram below.
From here it all comes down to some simple code to write on the Arduino to get some values.
| void setup() { // Setup serial Serial.begin(9600); }void loop() { Serial.println(analogRead(0)); delay(200); // wait 200 milliseconds |
Upload the code to the Arduino and now I can get a moisture value from the analog input between 0 and 614 (0-3 volts) depending on the degree of water saturation.
Though not as hacky as my PS2 controller moisture sensor solution definitely more elegant and reliable. Stay tuned for more details of other improvements to the computer controlled grow box.
Tags: arduino, cheap, growbox, led, outdoor plants, vegetables
Big events this week
15.3 years ago kids, sunflowers
My four five year old has been patiently been waiting for the “color sunflower” she planted from seed at a friends house this spring to finally bloom. Every morning she will run to the kitchen window and check on its progress. It turns out the sunflower was waiting to share her blooms on my daughter’s birthday which was definitely one of her favorite presents that day.
Here she is posing with her flower (still in pajamas)
Tags: garden seeds, outdoor plants
Doing recon at the local farmers market
15.3 years ago corn, farmers market, garden planning, garlic bulbs
Your mission, should you decide to accept it is to infiltrate a local farmers market to gain intelligence to help aid your personal garden.
Sure, the farmers market is a great place to find some fresh food you can’t or didn’t have time/space to grow in your garden. It is also a great place to get seeds/starts for your garden. It is also a great resource to figure out how various fruits/vegetables grow in your area.
Even if you are growing everything you want/need in your own garden a quick stop at your farmers market can help you check out your competition and see for example in my case, “hey their garlic grew just as bad as mine this year.”
This is also a good time to try out new fruits and vegetables you are thinking of growing next year. There is nothing worse than growing a bed full of arugula and figure out at that point you hate the stuff. If you are lucky enough you might even get a meal and some seeds to plant with next year depending on you seed saving ability.
Now as always you don’t want to blow your cover while doing surveillance, so make sure you have a good cover store. In my case I used a few people known as “my wife and daughters” to appear less conspicuous. You can even use techniques of taking a picture of your “daughter” to get some recon picture of their products for further analysis.
In the end it looks like my little spy helpers had a good time and we even contributed a little to the local farmers economy and got the secret ingredient to CVG Black Bean and Corn Salsa Recipe (ok, it was corn).
This post will self destruct in 10 seconds (sorry had to say it)
Tags: cheap, garden seeds, garlic bulbs, outdoor plants, salsa garden, vegetables
Grow box during the summertime – UPDATE
15.3 years ago computer, indoor growbox
UPDATE: With weather climbing my grow box got up to 111.5 degrees today with the lights off. If I was using one of those fancy computers with temperature sensors it would have turned itself off by now. Turning off computer so I will have something working this winter…
[July 25, 2009] I was planning on growing my jalapeno peppers in my grow box this summer, but given the higher than average weather we have been having.
With the weather being in the 90’s 100’s and given the CFLs on average increase the temperature by around 10 degrees the grow box has not been great place to grow plants unless I was thinking of growing cacti. Looking at my historical data the highest temperature this summer was 107.6 111.5 degrees.
As you can see above I have been making some progress on the computerized grow box, which I will plan on writing it up soon…
Tags: cheap, grow lights, growbox, outdoor plants, pepper plants, vegetables
Black Bean and Corn Salsa Recipe
15.4 years ago corn, peppers, recipe, salsa
My jalapeños peppers have been growing like crazy and I have had to start harvest to prevent the plants from stop producing. Given my tomatoes are still green I have been itching to do something with them, I decided to make some corn salsa. Given I couldn’t find a recipe that matched the ingredients I had on hand I decided to make my own.
CVG Black Bean and Corn Salsa Recipe
- 2 ears of corn (1-1/2 cups frozen corn)
- 1 small onion (chopped)
- 1/4 cup chopped cilantro
- 1/4 cup sliced green onions
- 2-3 cloves of garlic (chopped)
- 1/4 cup white vinegar
- 3 T sugar
- 1 chopped seeded jalapeño
- 1 chopped unseeded jalapeño
- 1-1/2 cups black beans (canned)
Directions: Cook corn for 2 minutes in boiling water and submerge in ice cold ice water. This helps stop the corn from cooking any more and also make handling while cutting the kernels a little more pleasant. Cut off kernels and add to bowl. Chop/slice remaining ingredients and add to bowl, stir, and refrigerate and serve chilled.
If you like your salsa a little spicier leave both pepper seeded.
Tags: cilantro, garden seeds, garlic bulbs, led, outdoor plants, pepper plants, salsa garden, tomato plants
How to fertilize/side dress tomatoes/peppers in your garden
15.4 years ago alfalfa pellets, compost, fertilizer, peppers, tomato
When your fruiting plants are flowering and bearing fruit this is a good time to give them a little extra boost. Though you don’t want to throw any old fertilizer at them at this point. You want them to get the nutrients they need to produce high yields of produce, though you don’t want to shock them with an abundance of nitrogen to stimulate new vegetative growth when you would rather the plant expend its energy making you food.
The solution to this problem is to provide your plants with a low dose of balanced fertilizer. I couple of my favorites are compost and alfalfa pellets applied every couple weeks while the plants are blooming/fruiting. This ensures the plants have all the nutrients they be lacking without throwing the plant into a growth spurt.
If you have a little extra time take the compost and add some water and let it sit in the sun for several hours and water or spray onto the foliage for a great dose of compost tea.
If you forgot to apply a little bone meal when you planted your peppers/tomatoes this is also a good time to sprinkle a handful under your plants and work into the couple inches of soil to provide your plants with a boost of phosphorous and also a little calcium to help prevent blossom end rot.
Hopefully with these tips you can help your green tomatoes turn into bright delicious red tomatoes.
If you want to learn more about the chemistry of organic fertilizers I have a whole post on that subject
Tags: alfalfa pellets, cheap, compost, organic vegetables, outdoor plants, pepper plants, tomato plants, vegetables
