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EIA96.py

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+index = {"01": 100, "02": 102, "03": 105, "04": 107, "05": 110, "06": 113, "07": 115, "08": 118, "09": 121, "10": 124, "11": 127, "12": 130, "13": 133, "14": 137, "15": 140, "16": 143, "17": 147, "18": 150, "19": 154, "20": 158, "21": 162, "22": 165, "23": 169, "24": 174, "25": 178, "26": 182, "27": 187, "28": 191, "29": 169, "30": 200, "31": 205, "32": 210, "33": 215, "34": 221, "35": 226, "36": 232, "37": 237, "38": 243, "39": 249, "40": 255, "41": 261, "42": 267, "43": 274, "44": 280, "45": 287, "46": 294, "47": 301, "48": 309, "49": 316, "50": 324, "51": 332, "52": 340, "53": 348, "54": 357, "55": 365, "56": 374, "57": 383, "58": 392, "59": 402, "60": 412, "61": 422, "62": 432, "63": 442, "64": 453, "65": 464, "66": 475, "67": 487, "68": 499, "69": 511, "70": 523, "71": 536, "72": 549, "73": 562, "74": 576, "75": 590, "76": 604, "77": 619, "78": 634, "79": 649, "80": 665, "81": 681, "82": 698, "83": 715, "84": 732, "85": 750, "86": 768, "87": 787, "88": 806, "89": 825, "90": 845, "91": 866, "92": 887, "93": 909, "94": 931, "95": 953, "96": 976}
+multipler = {"Z": 0.001, "Y": 0.01, "R": 0.01, "X": 0.1, "S": 0.1, "A": 1, "B": 10, "H": 10, "C": 100, "С": 100, "D": 1000, "E": 10000, "F": 100000}

bin/EIA96.py

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+index = {"01": 100, "02": 102, "03": 105, "04": 107, "05": 110, "06": 113, "07": 115, "08": 118, "09": 121, "10": 124, "11": 127, "12": 130, "13": 133, "14": 137, "15": 140, "16": 143, "17": 147, "18": 150, "19": 154, "20": 158, "21": 162, "22": 165, "23": 169, "24": 174, "25": 178, "26": 182, "27": 187, "28": 191, "29": 169, "30": 200, "31": 205, "32": 210, "33": 215, "34": 221, "35": 226, "36": 232, "37": 237, "38": 243, "39": 249, "40": 255, "41": 261, "42": 267, "43": 274, "44": 280, "45": 287, "46": 294, "47": 301, "48": 309, "49": 316, "50": 324, "51": 332, "52": 340, "53": 348, "54": 357, "55": 365, "56": 374, "57": 383, "58": 392, "59": 402, "60": 412, "61": 422, "62": 432, "63": 442, "64": 453, "65": 464, "66": 475, "67": 487, "68": 499, "69": 511, "70": 523, "71": 536, "72": 549, "73": 562, "74": 576, "75": 590, "76": 604, "77": 619, "78": 634, "79": 649, "80": 665, "81": 681, "82": 698, "83": 715, "84": 732, "85": 750, "86": 768, "87": 787, "88": 806, "89": 825, "90": 845, "91": 866, "92": 887, "93": 909, "94": 931, "95": 953, "96": 976}
+multipler = {"Z": 0.001, "Y": 0.01, "R": 0.01, "X": 0.1, "S": 0.1, "A": 1, "B": 10, "H": 10, "C": 100, "С": 100, "D": 1000, "E": 10000, "F": 100000}

resistors.pyw

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+from tkinter import *
+from PIL import ImageTk, Image
+import re
+#importing EIA-96 codes from EIA96.py:
+from EIA96 import index, multipler
+
+def calculate(e=None):
+    r_code = entry.get().upper().strip()
+    entry.delete(0, END)
+    entry.insert(0, r_code)
+    r_type = resistorCodeTypeCheker(r_code)
+    if r_type is None:
+        message_label.configure(text='Wrong Resistor Code!', fg='red')
+        r_label.configure(text='')
+        output_label.configure(text='')
+        return
+    message_label.configure(text='Enter Resistor Code:', fg='black')
+    resistance = resistanceСalculate(r_type, r_code)
+    resistance_value = unitAbbreviationsHandler(round(resistance, 3))
+    r_label.configure(text='Resistance:')
+    output_label.configure(text=resistance_value, fg='black')
+
+
+def clearEntry():
+    entry.delete(0, END)
+    r_label.configure(text='')
+    output_label.configure(text='')
+    message_label.configure(text='Enter Resistor Code:', fg='black')
+
+
+def unitAbbreviationsHandler(value):
+    if value < 1000:
+        answer = str(value) + " Ohms"
+        return(answer)
+    value = value/1000
+    answer = str(value) + " kOhms"
+    if value >= 1000:
+        value = value/1000
+        answer = str(value) + " MOhms"
+    return(answer)
+
+
+def entryMaxCharacters():
+    entry.delete(4, END)
+
+
+def resistorCodeTypeCheker(r_code):
+    patterns = ['^\d{4}$', '^\d{3}$', '^[R]+\d{1,3}$', '^\d{,2}[R]\d{1,3}$', '^\d{2}[A-F H R-S X-Z]$', '^[0]$']
+    types = ['4digits', '3digits', 'R+digits', 'digitsRdigits', 'EIA-96', 'zero']
+
+    for index, pattern in enumerate(patterns):
+        if re.match(pattern, r_code):
+            return types[index]
+
+
+def resistanceСalculate(r_type, r_code):
+    match r_type:
+        case '3digits':
+            value = r_code[0] + r_code[1]
+            power = r_code[2]
+            resistance = int(value)*(10**int(power))
+            return resistance
+        case '4digits':
+            value = r_code[0] + r_code[1] + r_code[2]
+            power = r_code[3]
+            resistance = int(value)*(10**int(power))
+            return resistance
+        case 'EIA-96':
+            value = index[r_code[0] + r_code[1]]
+            power = str(r_code[2])
+            resistance = int(value)*multipler[power]
+            return resistance
+        case 'R+digits':
+            value = r_code.replace('R', '.')
+            resistance = "0" + str(value)
+            return float(resistance)
+        case 'digitsRdigits':
+            value = r_code.replace('R', '.')
+            return float(value)
+        case 'zero':
+            return 0
+
+
+#Window elements initialization
+main_window = Tk()
+entry_text = StringVar()
+main_window.resizable(0, 0)
+main_window.minsize(300, 325)
+r_label = Label(font=('Courier', 16))
+main_window.bind('<Return>', calculate)
+main_window.title("SMD Code Calculator")
+ico = ImageTk.PhotoImage(Image.open("icon.ico"))
+main_window.wm_iconphoto(False, ico)
+output_label = Label(font=('Courier', 16), justify=CENTER)
+resistor_image = ImageTk.PhotoImage(Image.open("resistor.png"))
+r_image = Label(image=resistor_image)
+autor_label = Label(text='by CTL', font=('Courier', 8), fg='gray')
+message_label = Label(text='Enter Resistor Code:', font=('Courier', 16))
+clear_button = Button(text='Clear', font=('Courier', 16), command=clearEntry)
+calc_button = Button(text='Calculate', font=('Courier', 16), command=calculate)
+entry = Entry(font=('Courier', 21), width=4,  bg='black', fg='white', relief=FLAT, textvariable=entry_text, justify=CENTER)
+
+#Window elements placement
+clear_button.place(x=107, y=175)
+message_label.place(x=18, y=10)
+calc_button.place(x=82, y=125)
+output_label.place(x=76, y=266)
+r_image.place(x=101, y=50)
+r_label.place(x=76, y=246)
+autor_label.place(x=0, y=307)
+entry.place(x=115, y=62)
+
+entry_text.trace("w", lambda *args: entryMaxCharacters())
+main_window.mainloop()