def play(u1, u2):
reference = u1[0]
measured = u2[0]
power = 10.0 * np.log10(measured / reference)
amplitude = 20.0 * np.log10(measured / reference)
return power, amplitude
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.description = """
Calculate ratio in decibels
"""
parser.add_argument("arg1",
help='Reference numeric value (No units are expected)')
parser.add_argument("arg2",
help='Measured numeric value (No units are expected)')
args = parser.parse_args()
arg1 = units.parse(args.arg1)
arg2 = units.parse(args.arg2)
res = play(arg1, arg2)
msg1 = units.format_verbose(res[0], 'dB')
msg2 = units.format_verbose(res[1], 'dB')
print('Power ratio : {0}'.format(msg1))
print('Amplitude ratio: {0}'.format(msg2))
print('R1 is expected to be [{0}]'.format(U.R))
os.exit(-1)
if r2[1] != U.R:
print('R2 is expected to be [{0}]'.format(U.R))
os.exit(-1)
return v_in[0] * r2[0] / (r1[0] + r2[0]), U.V
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.description = """
Voltage divider. Provide input voltage [V], first resistance [Ω] and second resistance [Ω].
The resulting voltage will be calculated according to the formula:
V_out = V_in * R2 / (R1 + R2)
For example: volt_divider.py 10V 4k7 1k2
"""
parser.add_argument("arg1", help='Input voltage V_in [V]')
parser.add_argument("arg2", help='First resistor of the divider R1 [Ω]')
parser.add_argument("arg3", help='Second resistor of the divider R2 [Ω]')
args = parser.parse_args()
arg1 = units.parse(args.arg1)
arg2 = units.parse(args.arg2)
arg3 = units.parse(args.arg3)
res = play(arg1, arg2, arg3)
msg = units.format_verbose(res[0], res[1])
print(msg)