Teaching Myself Electronics (Part Two) — Transcript

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1. 0:00Remember how I said that I needed to
2. 0:01teach myself electronics in order to get
3. 0:02into grad school?
4. 0:04No?
5. 0:05Well, then go watch the video then.
6. 0:10After a few conversations with a bunch
7. 0:12of advisers and faculty members, because
8. 0:14apparently it takes 20 people to answer
9. 0:15one question, it turns out that I don't
10. 0:17actually have to take any classes
11. 0:19beforehand to get into grad school. I
12. 0:21can just take them while I'm there.
13. 0:25So, all the hard work from my first
14. 0:26video just straight into the trash can.
15. 0:28So, I decided that instead of spending
16. 0:30my summer studying in my room by myself,
17. 0:32all alone, I was going to enjoy my
18. 0:34summer [music] and go to the beach and
19. 0:35hang out with my family and do all the
20. 0:37things that I am not going to be able to
21. 0:39do once I go to grad school. However,
22. 0:41you see after all my years in college,
23. 0:42there is something that I have learned,
24. 0:44an unsettling truth. And it's that
25. 0:46professors, more often than not,
26. 0:49don't know how to do their jobs. Now, I
27. 0:51have high hopes.
28. 0:53Actually, scratch that. I have moderate
29. 0:55hopes, medium hopes,
30. 0:57average hopes, that my professors at NYU
31. 0:59will be good. But, I have been
32. 1:01disappointed
33. 1:02way too much in my life. And so, just in
34. 1:05case, I'm going to resume my studies
35. 1:08in electronics. [music]
36. 1:09And what better way to resume something
37. 1:11that I haven't done in almost 3 months
38. 1:14than by taking a test [music] to see
39. 1:15what I know and what I don't know
40. 1:18and figuring things out from there.
41. 1:20Let's go.
42. 1:25So, I found this book online, and before
43. 1:27I even can get to the contents, it tells
44. 1:29me that I should take this [music] test
45. 1:30that it offers. If I pass it, I can move
46. 1:32on to the rest of the book because I
47. 1:33have sufficient knowledge. If I don't, I
48. 1:35should pause, study, and then come back
49. 1:38to [music] take the test again, and then
50. 1:39move forward from there. And some of you
51. 1:41might be thinking, "Maria, didn't you
52. 1:42just spend a whole video studying
53. 1:43Arduinos and stuff like that? Shouldn't
54. 1:45you know about basic electronics?"
55. 1:48No. See, I took physics 2 a while back,
56. 1:50and that taught me some of the basics.
57. 1:52And then I took the Arduino course, but
58. 1:53that didn't teach me anything other than
59. 1:56how to use the Arduino. I feel like I'm
60. 1:58lacking a lot of knowledge, [music] and
61. 1:59so that's why I'm taking a step back
62. 2:01from the Arduino and going back to the
63. 2:03basics. [music] And I'm going to start
64. 2:05by taking this test.
65. 2:09>> [music]
66. 2:10>> I have the test pulled up. I have my
67. 2:12physics review guide in hand. I have a
68. 2:14whiteboard where I can write down some
69. 2:16of my answers, and I'm going to keep a
70. 2:18tally of everything that I get right and
71. 2:20everything that I get wrong. So, without
72. 2:22further ado,
73. 2:23let's begin. Uh electrical and
74. 2:25electronic devices work because of an
75. 2:27electric current. What is an electric
76. 2:29current? Okay. Electric current is the
77. 2:32movement of electrons through a specific
78. 2:34surface area, but current can be
79. 2:37described in two different ways. In the
80. 2:39past, we didn't really know that it was
81. 2:40the electrons moving through the wire,
82. 2:42and so we thought there was a positive
83. 2:44charge moving, which technically there
84. 2:46is if you consider that the electrons
85. 2:49moving leave like a positive charge gap
86. 2:53moving in an opposite direction, but
87. 2:55traditional current flow is electrons
88. 2:59moving from negative to positive, but
89. 3:01what we describe as electrical current
90. 3:04is from positive to negative. So, it's
91. 3:06confusing. Am I right? Electrical
92. 3:09current is a form of electric charge.
93. 3:11Electric charge usually consists of
94. 3:12negatively charged electrons. However,
95. 3:14in semiconductors, there's also
96. 3:15positively charged carriers called
97. 3:17holes.
98. 3:19I was freaking. Do I just keep a tally?
99. 3:21Write at least three ways an electron
100. 3:24flow or current can be generated. Ooh.
101. 3:27Voltage difference between two points,
102. 3:30and then you connect those two points.
103. 3:32But, I mean a battery causes that. I'm
104. 3:34going to put battery. Can't really think
105. 3:36of anything. What else can
106. 3:38create a flow of electrons? Okay, let's
107. 3:40see what the answer is. Oh, wait, you
108. 3:42can also cause Oh, oh, I didn't I did
109. 3:45not read this, I swear. You can cause
110. 3:46electric current by a magnetic field.
111. 3:49I'm so stupid. You can induct induce it.
112. 3:52It just popped into my head as I was
113. 3:54reading the first sentence, but then it
114. 3:55says magnetically. Okay, so I'm not
115. 3:57going to give that to the point to
116. 3:58myself. Let's see. Chemically.
117. 4:00Oh, photovoltaic
118. 4:02generation of electrons, thermal. Yeah,
119. 4:05I only have one point here. I'm not
120. 4:07going to give myself this point cuz I
121. 4:08feel like I got magnetically, but only
122. 4:11after I saw it. Chemically was the only
123. 4:13one I got correct with the batteries.
124. 4:15I'm going to speed through some sections
125. 4:16because it really is just a lot of math
126. 4:18involved. Okay. Let's see if my math is
127. 4:21correct. Oh.
128. 4:23It is correct. 10 11.2, 10, and 30.
129. 4:27Another point for me.
130. 4:29I was debating on trying to explain this
131. 4:31in a professional and teacher-esque
132. 4:33manner, but then I decided not to
133. 4:35because you could literally Google any
134. 4:37of this online and you're going to find
135. 4:38already a really good channel explaining
136. 4:40this. So, basically, I'm going over
137. 4:41Ohm's law, power formula, Kirchhoff's
138. 4:43law, resistors, and the voltage divider.
139. 4:46All the basics. At this point, the only
140. 4:48two questions I got wrong was the one
141. 4:49about current sources and a little bit
142. 4:52of issue doing the mathematica for
143. 4:54Kirchhoff's law. But, I've done all this
144. 4:56before. It's just a lot of math and
145. 4:58understanding the math. Until this.
146. 5:01This is where I don't know any formula
147. 5:04because I don't actually remember really
148. 5:05learning this in class. Do I have
149. 5:07anything? Do I have a formula here?
150. 5:13Mhm.
151. 5:16I think I just realized what I'm going
152. 5:17to do. So, what I'm going to do is I'm
153. 5:19going to learn about capacitors and I'm
154. 5:21going to take this part of the test
155. 5:23again because I genuinely don't know how
156. 5:25to answer any of these questions. I
157. 5:26don't know what a Yeah, inside a
158. 5:27capacitor.
159. 5:29So, out of 33, 30 out of 33, 90%.
160. 5:36>> [music]
161. 5:38>> I'm pleasantly surprised that I did
162. 5:39pretty well on the exam except for like
163. 5:42two questions-ish. And then I already
164. 5:44knew that I didn't know anything about
165. 5:45capacitors, so
166. 5:47we just got to learn that now. But,
167. 5:49before I can get into studying, I've got
168. 5:51to do something more important.
169. 5:55I've got to finish packing.
170. 5:57>> [sighs]
171. 5:58>> Okay, let's do it.
172. 6:00>> [music]
173. 6:07[music]
174. 6:29[music]
175. 6:39[music]
176. 6:49>> I have moved in. Classes are going to
177. 6:51start this Monday. It is currently
178. 6:54Friday, and I'm going to study just a
179. 6:57little bit, you know, just just a little
180. 6:59bit beforehand. Boom. Going to take my
181. 7:01textbook. Where is it? There it is.
182. 7:04Electronics notebook. This is my the
183. 7:06start of my notes about capacitors and
184. 7:08capacitance.
185. 7:10We're going to continue the notes about
186. 7:11capacitors and capacitance. I spent
187. 7:13about an hour reading about capacitors,
188. 7:15thinking that I got the basics down, and
189. 7:17then deciding that, you know what? I'm
190. 7:19just going to take the test right now.
191. 7:20You know, I'm not going to wait, and I'm
192. 7:21not going to redo the first section. I'm
193. 7:23just going to start off where the
194. 7:24capacitors are, cuz [snorts] I read
195. 7:26everything, and I should be good.
196. 7:29Right? To what final voltage will the
197. 7:30capacitor charge?
198. 7:33Oh, 10. I won't even have to do an
199. 7:35equation because it will charge [music]
200. 7:37to the amount the battery has. But, I
201. 7:39quickly realized that I didn't study
202. 7:40well enough.
203. 7:41>> To answer you must know what the time
204. 7:43constant is. The most time constant of a
205. 7:45circuit.
206. 7:47>> What? I have no idea. Oh, I see it.
207. 7:50Okay, never mind. I was
208. 7:52going to read this part here. We're
209. 7:53going to find out what it is.
210. 7:54Let's read this entire section. Yeah, so
211. 7:56skimming a website did not do anything,
212. 7:58so I decided to pull out my fat textbook
213. 8:00and actually read it. And lo and behold,
214. 8:02I actually understood what capacitors
215. 8:04are. Now, once again, there's just a lot
216. 8:06of math involved as I do a bunch of
217. 8:07different formulas, so I'm not going to
218. 8:08get into it, but overall, I finished the
219. 8:10test with a decent average of a 93. It's
220. 8:13not 100%, but I'll take it for now.
221. 8:17I mean, there's a lot of things that I
222. 8:18think I need to learn right now. Number
223. 8:20one, more [music] about capacitors.
224. 8:22Number two, I feel like I don't really
225. 8:24know much about AC currents, either. I
226. 8:25mean, there's a lot. I've got like 3
227. 8:27days, and there's so much that I want to
228. 8:29really work on. I mean, most of which
229. 8:32I'm I'm going to be doing during the
230. 8:34semester, but I feel like it's always
231. 8:37good to just [music] do it right now.
232. 8:38And then, first And then, the lastly,
233. 8:40the other thing I want to do is I really
234. 8:41want to
235. 8:42>> [music]
236. 8:42>> start doing some hands-on projects
237. 8:45because reading books is great and all,
238. 8:47but that's not really going to teach
239. 8:48[music] you what is actually going on
240. 8:50when you do when you're dealing with
241. 8:52real circuits. I'm going to keep
242. 8:54studying, and I would show you that, but
243. 8:57it it's really boring. [music]
244. 8:58Like, I'm I'm going to try my best right
245. 9:00now to make this not boring at all, but
246. 9:02I am at the end of the day just reading
247. 9:03a book and studying. And when I do that,
248. 9:05I also don't really care about being a
249. 9:08YouTuber and being like, "So, what I'm
250. 9:10learning right now is this"
251. 9:12>> [music]
252. 9:12>> If you want to really learn this stuff,
253. 9:14don't look at me to teach you it. There
254. 9:15already exists fantastic [music]
255. 9:16channels online that teach you all of
256. 9:18this information. I'm just showing you
257. 9:20guys what I'm doing, and I want [music]
258. 9:22to document my progress so that when I
259. 9:24in 2 years' time have my degree in
260. 9:26engineering, I can look back and be
261. 9:27like, [music] "Wow, she was stressed for
262. 9:30so much and yet so little." So, that's
263. 9:32my goal is to look back and be like,
264. 9:35"Everything was fine." And yeah, I'll
265. 9:37see you guys [music] in the next video.
266. 9:43>> [music]