# Initiating the schematic drawing process with specified components and connections:
# Creating a customized schematic for the user based on the provided image and component list.
import matplotlib.pyplot as plt
import matplotlib.patches as patches
fig, ax = plt.subplots(figsize = (10, 8))
# Parameters for components sizing
reg_size = (1, 0.5)
cap_size = (0.4, 0.4)
header_size = (0.4, 0.1)
conn_width = 0.1
# Adding power jack
pwr_jack = patches.Rectangle((0, 8), reg_size[0], reg_size[1], edgecolor = 'blue', facecolor = 'lightgrey')
ax.add_patch(pwr_jack)
plt.text(-0.2, 8.3, 'Power Jack', fontsize = 10)
# Adding LM7809
lm7809 = patches.Rectangle((0, 6), reg_size[0], reg_size[1], edgecolor = 'black', facecolor = 'lightgrey')
ax.add_patch(lm7809)