commit c5dee9ccd7273745cd4326746b7bc697975f6bd5
parent b4b57b966c21de080f8982e655e42d348fba1512
Author: thing1 <thing1@seacrossedlovers.xyz>
Date: Mon, 27 Oct 2025 09:55:18 +0000
added a lab, and many notes
Diffstat:
12 files changed, 196 insertions(+), 0 deletions(-)
diff --git a/CS12020/22.10.25.md b/CS12020/22.10.25.md
@@ -0,0 +1,4 @@
+22/10/25
+========
+
+
diff --git a/CS12020/24.10.25.md b/CS12020/24.10.25.md
@@ -0,0 +1,5 @@
+24/10/25
+========
+
+- look up andy's band the moon men
+-
diff --git a/CS12020/labs/lab4/Makefile b/CS12020/labs/lab4/Makefile
@@ -0,0 +1,10 @@
+all: compile upload
+
+upload: compile
+ arduino-cli upload --fqbn arduino:avr:uno . -p /dev/ttyACM0
+
+compile: lab4.ino
+ arduino-cli compile --fqbn arduino:avr:uno .
+
+monitor:
+ arduino-cli monitor -p /dev/ttyACM0
diff --git a/CS12020/labs/lab4/lab4.ino b/CS12020/labs/lab4/lab4.ino
@@ -0,0 +1,46 @@
+#include "util.h"
+
+const char *order[] = {"Secs", "Mins", "Hours"};
+const int time_orders = SIZE(order);
+
+const char *sports[] = {"swim", "run", "cycle"};
+const int number_of_sports = SIZE(sports);
+
+int
+input_time(const char *order, const char *sport) {
+ SEprintf("How many %s did %s take: ", order, sport);
+ return readint();
+}
+
+void
+input_sport(const char *sport, int times[time_orders]) {
+ for (int i = 0; i < time_orders; i++)
+ times[i] = input_time(order[i], sport);
+}
+
+void
+normalize(int times[time_orders]) {
+ for (int i = 0; i < time_orders - 1; i++) {
+ times[i + 1] += times[i] / 60;
+ times[i] %= 60;
+ }
+}
+
+void
+setup() {
+ int sport_times[number_of_sports + 1][time_orders] = {0};
+ Serial.begin(9600);
+
+ for (int i = 0; i < number_of_sports; i++)
+ input_sport(sports[i], sport_times[i]);
+
+ for (int i = 0; i < number_of_sports; i++)
+ for (int j = 0; j < time_orders; j++)
+ sport_times[time_orders][j] += sport_times[i][j];
+
+ normalize(sport_times[3]);
+
+ SEprintf("Total time: %dsec %dmin %dhr.\n", sport_times[time_orders][0], sport_times[time_orders][1], sport_times[time_orders][2]);
+}
+
+void loop() {}
diff --git a/CS12020/labs/lab4/tmp b/CS12020/labs/lab4/tmp
@@ -0,0 +1,54 @@
+#include "util.h"
+
+int
+input_time(const char *order, const char *sport) {
+ int i;
+ SEprintf("How many %s did %s take: ", order, sport);
+ i = readint();
+ SEprintf("\n");
+ return i;
+}
+
+void
+readtime(const char *sport, int secs[], int mins[], int hours[], int i) {
+ secs[i] = input_time("secs", sport);
+ mins[i] = input_time("mins", sport);
+ hours[i] = input_time("hours", sport);
+}
+
+int
+sum(int arr[3]) {
+ int total = 0;
+ for (int i = 0; i < 3; i++)
+ total += arr[i];
+
+ return total;
+}
+
+void
+setup() {
+ int secs[3] = {0}, mins[3] = {0}, hours[3] = {0}, res[3] = {0};
+ char *sports[] = {
+ "swim",
+ "run",
+ "cycle",
+ };
+
+ Serial.begin(9600);
+
+ for (int i = 0; i < SIZE(sports); i++)
+ readtime(sports[i], secs, mins, hours, i);
+
+ res[0] = sum(secs);
+ res[1] = sum(mins);
+ res[2] = sum(hours);
+
+ for (int i = 0; i <= 3; i++) {
+ res[i + 1] += res[i] / 60;
+ res[i] = res[i] % 60;
+ }
+
+ SEprintf("Total time: %dhr %dmin %dsec.\n", res[2], res[1], res[0]);
+}
+
+void loop() {}
diff --git a/CS12020/labs/lab4/util.h b/CS12020/labs/lab4/util.h
@@ -0,0 +1,21 @@
+#define SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
+
+void
+SEprintf(const char *fmt, ...) {
+ static char sbuf[64] = { 0 };
+ va_list ap;
+
+ va_start(ap, fmt);
+ vsnprintf(sbuf, 64, fmt, ap);
+ va_end(ap);
+
+ Serial.print(sbuf);
+}
+
+int
+readint() {
+ while (!Serial.available()) ;
+ int i = Serial.parseInt();
+ SEprintf("\n");
+ return i;
+}
diff --git a/CS18120/22.10.25.md b/CS18120/22.10.25.md
@@ -0,0 +1 @@
+22/10/25
diff --git a/CS18120/24.10.25.md b/CS18120/24.10.25.md
@@ -0,0 +1,9 @@
+24/10/25
+========
+
+EpIc mEmEs
+----------
+
+1, 3, 2, 5, 4, 6, 7
+
+
diff --git a/MP10610/21.10.25.md b/MP10610/21.10.25.md
@@ -0,0 +1,8 @@
+21/10/25
+========
+
+Differentiation
+---------------
+
+- see FIG1 for differentiation by first principles
+-
diff --git a/MP10610/23.10.25.md b/MP10610/23.10.25.md
@@ -0,0 +1,9 @@
+23/10/25
+========
+
+Differentiation
+===============
+
+- see FIG1 for the product rule
+- see FIG2 for a proof of the product rule
+- see FIG3 for the quotient rule
diff --git a/MP10610/27.10.25.md b/MP10610/27.10.25.md
@@ -0,0 +1,24 @@
+27/10/25
+========
+
+- see FIG1 for a use of eulers formula, when adding angles in polar form
+- we can use De moivres formula to multiply angles
+
+- the roots of unity all lie on the unit circle (with an imaginary y axis)
+- each root is evenly distributed along the unit circle
+- see fig4 for the roots of unity formula
+ - n is the number of roots that you are looking for
+ - when n is 0, the root is always 1, meaning 1 is always a root
+- FIG3 shows how to find the 5th root of unity
+ - m must be substituted in for all its values
+
+- to solve complex roots (see FIG4 for a worked example)
+ - write the right hand side in polar form
+ - multiply the right hand side by e^(2 PI i m) where m is an int
+ - take the nth root of the right hand side
+ - convert back into polar form (magnitude and angle)
+ - substitued the values of m into the angle
+ - we can then draw this on a circle, it will have a radius of the magnitude
+ - then draw on the angles found before
+
+
diff --git a/PH16210/23.10.25.md b/PH16210/23.10.25.md
@@ -0,0 +1,5 @@
+23/10/25
+========
+
+- see FIG1 for De Moivre's theorem
+ - this can be used to prove the addition formula of sin and cos
