From 54ca67bc4b75fe2ad6d2f68aa4eff61f781d2af8 Mon Sep 17 00:00:00 2001
From: Holden Rohrer <hr@hrhr.dev>
Date: Mon, 1 Nov 2021 16:18:06 -0400
Subject: updates for math and physics homeworks

---
 jarrio/week10resistors.py | 66 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 jarrio/week10resistors.py

(limited to 'jarrio/week10resistors.py')

diff --git a/jarrio/week10resistors.py b/jarrio/week10resistors.py
new file mode 100644
index 0000000..f7041c7
--- /dev/null
+++ b/jarrio/week10resistors.py
@@ -0,0 +1,66 @@
+class resistor:
+    def __init__(self, resistance: float):
+        self._resistance = resistance;
+        self.has_current(0)
+
+    def has_current(self, current: float):
+        self._current = current
+        self._voltage = current*self._resistance
+
+    def has_voltage(self, voltage: float):
+        self._voltage = voltage
+        self._current = voltage/self._resistance
+
+    def __repr__(self):
+        return f"Resistor with resistance {self._resistance}: current {self._current} through voltage {self._voltage}"
+
+class parallel(resistor):
+    def __init__(self, r1: resistor, r2: resistor):
+        self._r1 = r1
+        self._r2 = r2
+        self._resistance = 1/(1/r1._resistance + 1/r2._resistance)
+
+    def _update_children(self):
+        self._r1.has_voltage(self._voltage)
+        self._r2.has_voltage(self._voltage)
+
+    def has_current(self, current: float):
+        self._current = current
+        self._voltage = current*self._resistance
+        self._update_children()
+
+    def has_voltage(self, voltage: float):
+        self._voltage = voltage
+        self._current = voltage/self._resistance
+        self._update_children()
+
+class series(resistor):
+    def __init__(self, r1: resistor, r2: resistor):
+        self._r1 = r1
+        self._r2 = r2
+        self._resistance = r1._resistance + r2._resistance
+
+    def _update_children(self):
+        self._r1.has_current(self._current)
+        self._r2.has_current(self._current)
+
+    def has_current(self, current: float):
+        self._current = current
+        self._voltage = current*self._resistance
+        self._update_children()
+
+    def has_voltage(self, voltage: float):
+        self._voltage = voltage
+        self._current = voltage/self._resistance
+        self._update_children()
+
+r24 = resistor(24)
+r4 = resistor(4)
+r12 = resistor(12)
+r5 = resistor(5)
+rtot = parallel( r24, series( parallel(r4,r12), r5 ) )
+rtot.has_current(1)
+print(r24)
+print(r5)
+print(r4)
+print(r12)
-- 
cgit