The system will:
Measure temperature
Thermocouple
Convert signal (digital - mV)
ADC
Read signal & determine what it means
FRDM boards
Determine signal to send to heater
FRDM boards
Signal to heater amplified
Transistor used with PWM
Amplify voltage from PWM from Microcontroller
Relay used with PWM
Heat solution
Resistor heator? Resistive wire?
Hot plate