I'm new to Arduino, but have some experience with C++.
Project Goal: Heat up a 1/2x3x4" aluminum platform anywhere from room temperature to 150F using a 1x2.5" Kapton heater and an Arduino Uno with PID control . Let the user set the temperature within this given range. Use a thermocouple to read the temperature of the platform and have the temperature displayed on an LCD monitor.
I would like to use K-Type thermocouples as my temperature sensor. Therefore I believe I will need either a MAX31855 or AD595 - anyone have a preference?
With the Kapton heater I have (model: HK5369R101L20A), the resistance is 101 ohm and yields 1.43W at 12V (current = 0.12A). This gives about 0.55W/in^2. If I use epoxy to mount the Kapton heater to my platform, it can crank up to ~240F! However, I think I need a lot more than 12V input to achieve a high temperature. Hoping to use about 50V (24.75W, 0.5A) to heat up the platform in a reasonable time.
Seems like I need some sort of amplifier to increase the power signal from the Arduino . What is the best way to get a high voltage to power this Kapton heater without frying the Arduino Uno? Any idea if I need a solid state relay and if so, what kind? Do I need a shield? Budget is not a concern - more focused on a simple solution.
Really appreciate your help!! Thank you.