Eggplants became too big in tight space now (stretching their shoulders 🙂 ). The middle plant below started to look stressed out by the side plants. So, it was time to move the middle one out of this area.
Now, this one has more space to grow horizontally and vertically. The leaves showed a little disease. So, I did a little bit of leaf cut.
Made Japanese “tsukemono” out of eggplants and cucumbers.
Made a video of the backyard garden for the first time as a story.
Just out of curiosity, measured the resistance of eggplants and tomato plants. When it is between the edge of a egg plant leaf and stem, the resistance value is about 2MOhm.
Old leaf doesn’t have moisture and it looks like the equivalent resistance of the old leaf is very high (i.e. open circuit). Small and young leaf have less resistance. Depending on the nutrition of the plant, the resistance seems to change.
I can use the tomato as a current limiting resistor to turn on a LED.
Tomato started growing more as the temperature in Oregon started going up.
There are six eggplants and each plant now has a bunch of flowers. At the same time, they attract snails 😛
Green onions. Bought green onions at a grocery store and kept them in a glass of water. Changed water every morning for two weeks and each has enough roots now. So, it was time to plant them outside.
SmartGarden device now is equipped with GPS sensor (Amazon Link) to keep track of real time information – GPS coordinates can be recorded as well. As the device has an USB charger block to power the Arduino microcontroller (Amazon Link) and other sensors, this became a portable device to check out brightness from the light sensor (Amazon Link).
The picture below shows the Analog Three-way meter and my own SmartGarden device.
Again, on a Friday night after work, when we had no plan, why not watch a free movie and eat popcorn with other people in a park. This is a very friendly and safe place to hang around thanks to the City of Portland. On this day (7/12), they had this Movies in the Park event at Colonel Summers Park in East downtown Portland.
How to get there?
It takes about 8 mins drive from downtown Portland. The traffic towards a bridge across Willamette River can get heavy depending on time of a day.
Previously, the smart gardening device was built as an alternative method to the analog three-way meter (amazon link) shown in the picture below.
Using Arduino Software on Windows OS.
The arduino module used in this project is Arduino Micro (Amazon Link).
The data of light sensor output to Arduino are voltage values. In general, when it is brighter, the resistance value of the light sensor becomes smaller. As an example, about 100 Ohm in the sun light and ~ 10M Ohm in darkness.
Arduino microcontroller is programmed so that the log from Arduino produces the voltage value at a node of the light sensor every second. This indicates the brightness captured by the sensor. The data will be shown on the Arduino console and 4-line LCD.
With LED Desk Lamp, Arduino and Light Sensor (Amazon Link).
LED Desk Lamp has 4 light brightness levels
As the desk lamp gets brighter, the voltage value goes down. This means that the resistance of the light sensor goes down.
Test this prototype outside and compare the results with the analog meter.
Every summer in Portland Oregon, Portland Parks and Recreation by the City of Portland offer free movie and live music concerts with local music bands. This is a very friendly event and kids would love it.
The movie starts after dusk (it started around 9:30pm). Free concert starts around 6:30pm.
kids playground, basketball courts and baseball field are there.
Food and Drink?
Free popcorn and food carts are available. Everybody is welcome to bring any outside food.
How was the movie?
The movie was Fantastic Beasts: Crimes Of Grindelwald from 2018. The movie was a little more than 2 hours (2 hr and 13 min). This is the second movie of the “Fantastic Beasts” series. The content is about what happened before Harry Potter. Young Dumbledore was in the movie.
They played the DVD version. The movie started after 9:30 and finished around 11:30. It got very cold. Extra blankets would help.