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I created a (cool) logic gates circuit

At work, I need to have a good soldering skill. But honestly, I don't have the talent yet, so I need to practice. I asked my manager if I could practice soldering 1 hour a day, and he generously permitted me. For my soldering practice, I want to make something out of it. I want to produce little projects using the used or cheap components that are readily available. As my first project, I designed a logic gate circuit using transistors. The objective of the circuit is so that when I configure the 8-switch DIP switch, the circuit will be modified to a single functioning logic gate between OR, NOR, AND, and NAND gates. The 2-switch DIP switch is the two inputs. The red LED is the output (ON is 1, OFF is 0). The 8-switch DIP switch configuration is as follows: OR gate      00011100 NOR gate     00101110 AND gate     11000001 NAND gate     10100011 I am more comfortable using NPN transistors, but I only had two pieces of them. I needed more, so f...
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First BBQ Party in a Nature Park

 Our department at work organized a BBQ party at Nagata Nature Park. The BBQ was delicious, but what I liked most was the place. It was very beautiful. There were lots of tall trees and stylish pyramid cabins beneath them. It was a shame I was not able to walk around to see more of the forest. We only stayed from 10AM to 6PM. Having been to a Japanese nature park for the first time made me appreciate the beauty of nature. I would like to go to a nature park again with close friends, have a BBQ, camp, stay overnight, light fireworks, talk for hours by the fire, and be nervous about bears. Yes, that's a good idea. I would love that. [A]

hanabi

In her message, a Japanese tutor told me that she went to see fireworks in Kamakura and asked if I had ever seen fireworks in Japan. I handwrote my reply in Japanese to say that I have not yet done so and that I want to experience them someday. While writing, I learned that the Japanese word for fireworks is   花火    (はなび • hanabi) . Broken down,   花   means "flower" and   火  means "fire".   花火   is literally "flower fire". The Japanese see fireworks as flowers in the form of fire, and I find that deeply poetic. I had never thought of fireworks that way before, and learning this has changed the way I see them forever. In my eyes, they are no longer just bright, colorful explosions in the night sky. Fireworks are flowers made of fire. Violent and yet ever so delicate, their ethereal beauty makes them seem almost otherworldly. Perhaps that is why they bloom for only a few fleeting seconds.

The 2 o'clock problem

 A year ago, I took a math exam for a job application. I passed the exam, made it to the interviews, and actually got qualified for the training. Eventually, I decided not to take that opportunity, and I chose to pursue the job that I have right now. But this article is not about that missed job or any jobs. This is about a particular math problem in the math exam. It was so interesting that I told myself I would write about it. And after 1 year, here it is. The problem went like this: It is 2:00. At what time will the hour hand and the minute hand form a straight line? Before this exam, I had never solved a problem like this. I had no idea where to begin (let alone solve it). I could skip this problem and not give a fuck about this 1 point. But I did not. I wanted to solve it not for the point, but for the sake of solving it. I wanted to prove to myself that my knack for geometry from high school was still sitting behind my brain, awaiting to be tapped. I so began thinking. The fi...