User:Hyunjitje

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Minor Digital Craft 4th Year

Practice Digital Craft 2nd Year


Hyunji.jpg

angiethebard@gmail.com
0915620


First Class

Gr5.jpg Gr5.1.jpg

I grouped up with Mickey, Axel and Ayo. Denis gave us a lecture about basic electricity. We did a small exercise to show what we learned from the class. We did a small play to show how plus and minus electrons work when they are close and far from each other.


Second Class

We experimented with small circuit boards and batteries.
Digi3.jpg

Battery: -8.78V (We switched around the + and the -, so the reading is in -. But we saw and changed it so it was right, but forgot to picture it.)
Resistance: 470 ohms
Current: 13.8 mA


Measuring Voltage and Current
Digi4.jpg Digi9.jpg Digi10.jpg 9V battery and diode


Here we measured the resister.

Resister1.JPG Resister2.JPG Resister3.JPG 5.jpg

Volt 1st resistor 9.83 Volt / 2nd 0.32 Volt / 3th 0.18 Volt/ 1th + 2nd together 10.15 Volt / 2nd + 3th together 0,5 Volt / 1th +2nd +3th together 10.83

I = V/R 9,11: 9,83 = 0,93 9,11 : 10.83 = 0,84

We measured the different resisters so we knew the value.

Third Class

Noise 01.jpg Noise 02.jpg

To be honest, I missed half of the class because of the unmatched planning on mywdka and wike page. I tried to follow what was going on during the class and Denis explained me what I could do. And then I realised I actually did the similar thing at an open course last year which was about making a circuit that makes noise when you touch. I could also made a noise with water.


Individual Project

Previous Work
Carto01.jpg Carto02.jpg

I made an weaving loom with LED at quarter 6 at fine art department and decided to develop the work. The concept was about weaving my own tapestry as a traveller. Since I have mainly worked with textile so far and I wanted to make my own textile. I got the idea of weaving a tapestry from a travel to Morocco. I visited Berber people's village and could see many tapestry works of them. They are also nomadic tribe. I have travelled a lot and now I am staying in the Netherlands. Therefore I wanted to describe my identity by weaving a tapestry. The light from the fibres signifies the star constellation, which guides you find the direction when you are lost on trip.

I decided to continue this work for this practice. This time, I wanted to make a wearable object like smart textile. I already had the material "optical fibre". I decided to make a cape which also signifies traveller, and to weave optical fibre through the cape. At the beginning I just wanted to use some LEDs and Arduino to programme some changes in the light as before. But when I talked to the teachers they suggested me to use light sensor "LDR", and I thought it would be awesome. So I decided to make a fibre-woven, lighted cape that interacts with lightness of surroundings.



Circuit and Material
Circuitdrawingtom.jpg
So I asked Thomas for help to make a circuit. I could get the light source from the package with optical fibre. I also measured the voltage and current of each R, G, B lines and white wire for + but forgot to take pictures.. From the result of measurement, I could know which transistor and resistor I need for this circuit.
3 x BD139 transistor for each R, G, B lines
3 x 360 ohm resistor for each R, G, B lines
1 x 10K ohm resistor for Arduino
1 x LDR (Light sensor)


First I tried with breadboard and then it worked properly. Then I soldered the actual circuit.
Circuitfiber01.jpg

However, when I took this to the last class and tried out if it works, there was a problem with the LDR-resistor part. When I tried to plug the voltage pin on Arduino it got really hot. Denis explained to me it was because I connected the voltage and ground so it was making a very short circuit. So I changed the connection between LDR and resistor. Then it started to work, but the value of LDR was not changing that significantly. It was in between 974-1024. So I asked Thomas and he said there is another error again.
Correctionldr.jpg

However, even after I fixed the circuit, LDR was working the same and for some reason, Red light was not working. I think I broke the transistor while I was soldering. Same thing happened to me before when I was soldering too long and too hot. So I had to give up some of my original plan. My original plan was to make the light brighter in the dark and after I realised the red light was not working, I wanted to programme like when it's dark, there is more Blue value and when it gets lighter it has more green value. But then LDR was not working. So I dropped the idea of programming complicated. I just put the blue and green light together all the time. Then finally it worked!
Circuitfiber02.jpg


There were many small mistakes during the process but to summarise what I failed are:
Use of LDR
Complicated programming

I kind of pushed myself to try out more complex circuit than I did before. But unfortunately not everything worked out as planned. But still, I learned new things such as how to prevent making a short circuit, how to measure voltage and current to know the right resistor, and I also vaguely remember DC and AC therefore I need a transistor. I still want to try to fix the circuit to accomplish my original goal and revise all new things I learned from the process.



I still need to put the picture of my end result. It's trippy.