Logarithm in PBP

[ronsimpson]

Savnik,

You need to get a book on basic electronics. Voltage Current Power and Resistance.
Power = voltage * current
In your case you can not see the current so: Power = Voltage * Voltage /Resistance (Voltage squared)
To prove that look at your table. Voltage of 22.4 volts = 10 watts and Voltage of 44.7 volts = 40 watts. Voltage increases 2:1 and power increases 4:1. That proves there is a voltage squared * constant.

Voltage * Voltage/50 = Power

To convert to db is very hard or very simple depending on how you look at it. You can fight BIG math for weeks. When you understand db it is almost as simple as finding Power. I will not tell you how now. You need to think about it for a while.

RonS.

[savnik]

Savnik,

You need to get a book on basic electronics. Voltage Current Power and Resistance.
Power = voltage * current
In your case you can not see the current so: Power = Voltage * Voltage /Resistance (Voltage squared)
To prove that look at your table. Voltage of 22.4 volts = 10 watts and Voltage of 44.7 volts = 40 watts. Voltage increases 2:1 and power increases 4:1. That proves there is a voltage squared * constant.

Voltage * Voltage/50 = Power

To convert to db is very hard or very simple depending on how you look at it. You can fight BIG math for weeks. When you understand db it is almost as simple as finding Power. I will not tell you how now. You need to think about it for a while.

RonS.

I am a electronic for 30 years.
Thank you for your help. You give me some idea how to calculate.

[mackrackit]

Savnik,

Your problem has been bugging me, I like math puzzles, and the post by Pic_User did clear things up.

Now if I understand your table correctly, POWER column is the reading you want and the VOLT column is the value you now have. If this is correct, then keep reading, if not than ...

This is the formula:

Step #1:

D = (VOLTS / 10) * 0.2 'D' is a dummy variable

Step #2:

POWER = VOLTS * D

This give an answer within .1 of the value in the power column.

Hope this helps.

[mackrackit]

I look back and see that ronsimpson said the same thing.

Now you have two ways to do it.

[ronsimpson]

P=v*d, D=(v/10)*.2

P=v*((v/10)*.2)

P=v*v*.2/10

P=v*v/50

[mackrackit]

P=v*d, D=(v/10)*.2

P=v*((v/10)*.2)

P=v*v*.2/10

P=v*v/50

I was looking at a way to change one set of numbers into another. Did not pay attention to your post or think in electrical terms. Just MATH. NUMBERS DO NOT LIE. NOT OFTEN

[ronsimpson]

You must be an Engineer not a Lawyer or Statistician. On subject; I need to get back to taxes.
Fuzzy logic (fuzzy math)