Recent content by Benjamin Sorensen

Thank you for the awesome reply! Is the IEEE-835/1994 document available for free? I would like to read about the equations you listed in more detail. Here is more information about my setup: Wire diameter: 20AWG (0.032in) Resistance per manufacture's spec sheet: 0.6348 Ω/ft 3ft of wire is...

Thank you for the awesome welcome! Current plan is to measure the change in resistance to calculate the actual power draw at high temperature. As science goes, I am predicting the resistance will be higher and with a constant voltage in, the power draw will be lower. I will report back on my...

That is a great point that resistance changes with temperature. Would attaching a voltmeter while a power supply is attached to the wire be a good way to measure resistance? I had trouble measuring current that way.

Sorry, I misspoke. The voltage delivered was constant. And the current drawn displayed on the power supply was also constant. I couldn't figure a good way to validate the current value displayed. Since when I hooked up a voltmeter, the voltmeter draw affected the readings. For example, the power...

I have considered that. Is that a good way to validate an experiment though? My goal is to confirm that my wire is indeed dissipating 13.15W. The resisitivity would just be a second way to calculate theoretical power dissipation. I would still need a way to validate that second calculation.

The power was calculated by first measuring the resistance of the wire to be 1.9Ω with volt meter. Then delivering 5V of DC power from a variable power supply. So, V2/R = 13.15W. The power delivered was constant for the 5 minutes or so it took to reach equilibrium temperature.

Thank you for the helpful response! You bring up valid questions. Which raw data would you like to see? I have graphical data outputted by the arduino showing the predicted exponential decay to the steady state temperature value. The power was calculated by first measuring the resistance of...

I'm having trouble verifying an experiment I ran to determine the power dissipation of a heating element. 13.15W of power was applied to 3ft nichrome wire. Temperature readings were collected until they stabilized at 128.5F (room temp was 70F). I want to create a mathematical model of the system...