Aquaponic Farm

Felix and I have planned our aquaponic system. We are using a steel wire rack as the base. We will have a 20 gallon fish tank with two 10 gallon (36″x18″x6″) grow beds for a 1:1 fish tank to plant bed ratio. We will use a Four outlet power relay module to control the pump, grow light and fish food. This relay module will the control center of the operation. With this we can control remotely when the plants are watered, receive light and when the fish are fed. We are currently in the process of procuring everything we need for the project.

Here is our working Instructables tutorial 


Final project progress (Pomodoro Lamp)


I started drafting instructible instruction.

Here’s the starting paragraph about my project.

Pomodoro Lamp uses movement and light of a light bulb to increase your productivity. When you start a task, the light bulb rises up as the light turns on for 40 minutes. After 40 minutes, the light bulb falls back down and turns itself off for 20 minutes. The lamp repeats this on and off process until after the task is completed. You can also track how many 40-minute sessions it took to complete the task.


Step1  – Parts, Tools, Supplies

Step 2 – Circuit Diagram and codes


I was able to get the micro servo motor (where the light bulb would go) to go one way for 40 mins and then the other way for 20 mins to display the Pomodoro effect.

Step 3 would be about construction. I am working on connecting the shaft to the servo motor and I would include the process in this step. Moreover, I would include the CNC cut file and any adjustments I would make to keep the circuits in place.

Step 4 would include using Power Relay to turn the light on and off along with connecting with IoT for task tracking. For the IoT, I would like to create a work flow like this:

  1. Google Calendar Applet ‘If any new event added on Homework, then send data to create a task feed’.
  2. This turns on the light and raises the bulb.
  3. When you complete the event or task, turn off the light.

I am still exploring different applets to get this to work smoothly, as I found out that there are no such applets that end an event. So I am planning to look into ios reminders applet.


The following are the next obstacles that  I need to tackle:

1) Attaching the shaft to the motor

2) Making the power relay to work with IoT integration



Wk 11 HW & BoM for final

I finished Lesson 4 and the first half of Lesson 5 in class, so I don’t have photos or video of that.

I’ve decided to continue working on my bluetooth headphones for the final project. Proposed BoM for the headphones:

  • Microcontroller options:
  • 2 mini addressable RGB LED
  • Lithium battery 150 mAh, 3.7V and charger
  • Translucent ABS plastic (?) composite to 3D print the cover piece for the headphones
  • Plastic housing/neckpiece for the microcontroller (Not sure if I should purchase or try to 3D print it)
  • Cheap flat back BLE earbuds to attach LED and cover piece to
  • silicone covered stranded core wire – 30 AWG
  • White heat shrink tubing
  • soldering supplies
  • Glue to attach LEDs to earbuds. I think something like E6000 would work.

I was hoping to make the headphones wireless overall, like the Bluetooth headphones that hang around your neck. The microcontroller would be on the back of your neck like a necklace.

Week 11 homework


Here are my Arduino exercises.


Whenever I create a data for the weather ‘cloudy’, ‘clear’, or ‘rain’, the neopixel lights up in different ways.



This was tricky but we figured out that we needed to use the same Adafruit IO id and key.

When my friend hits a button on her circuit, the LED lights up on my circuits.


For my final project, here’s the bill of material.

  1. hobby DC gearbox motor or servo motor? (move the light bulb up and down)
  2. Power Relay FeatherWing (turn on and off the light)
  3. Stacking Headers for Feather – 12-pin and 16-pin female headers
  4. wires
  5. breadboard or microcontroller
  6. resistor
  7. transistor
  8. lightbulb and socket



Lesson 4/5/6 and BOM for the final project

For my final project, I decided to make two interactive products that can be used as a communication tool for two people. Below are the things that I am planning to buy. I am planning to make two flower bouquets!

Lipo battery and USB cable X2

Mini vibrating motor X2

vibrating sensor X2

NPN transistor(PN2222) X2

Diode(14N001) X2

100-1K ohm resistor X2

LED sequins or Neopixels

fake flowers

two vases to put flowers in/or fabrics to cover the bottom part


Lesson 4


Lesson 5

Lesson5-Button from Shin Young Park on Vimeo.

Screen Shot 2018-11-20 at 10.04.07 PM.png

Lesson 6

Lesson6 from Shin Young Park on Vimeo.


I finished my lesson6 first and then went over to finish lesson 5, but while I was working on lesson 5, my Huzzah started to not work. (sometimes it turns on, but sometimes it does not) So I am posting the photos I managed to finish. I will finish it after solving the problem!





BOM for final project

A typical user journey could be: when the user get into the door, he put the key on the key reader and it reads the key; if the key wasn’t there,  a warning sound will be played to tell the user to put the key on it. The reader only starts to work when the reed switch detects a change of status (closed-open-closed) and the distance sensor detects the user (it is important to have double check because sometimes the door will be opened and closed just because the user want to make sure it is closed.  When the user open the door again, the reed switch turns to open and simultaneously, the key reader will search for the key again, and if it is still detected, the warning sound will be played to tell the user that he should take the key.

And maybe the reed switch should be connected to another separated board (which can be connected to the main board with Bluetooth or WiFi) because the reader can be placed somewhere far from the reed switch this way.

And here is the exercise.

Aquaponic Farm

I am looking at this tutorial:

Felix, Helen Marko and I are going to work on it the aquaponic farm.

BOM from the tutorial:

Full BOM

Principal Components
Grow bed
Fish tank
Sump tank

Bell Siphon
25mm polypropolene tank fitting
1 off. 25mm female threaded fitting
1 off. short length* ~100mm length of pvc pipe.  note that this length is critical in determining the top level of the water during the flood cycle.
1 length off 50mm PvC pipe
1 off. 50mm Pvc endcap

Media Filter
90mm PVC pipe
90mm end cap

Outlet Pipe
1 off. 25mm male threaded fitting
1 off. 25mm 90 deg elbows
2 off. short lengths of 25mm pvc pipe to join fittings
2 off. 25mm 90 deg elbows
1 off. 25mm ‘T’ fitting
1 off. 25mm female threaded adapter
2 off. 25mm threaded male to 19mm barbed hose fitting (poly propylene)
2 off. 25mm end caps
2 off. 25mm pvc pipe cut to 200mm (depends on width of your grow bed)
various short lengths of 25mm pvc pipe to join fittings

Overflow Pipe
1 off. 50mm polypropolene tank fitting
1 off. 50mm female threaded adapter
Chicken wire

ATX power supply
Relay Kit