The Problem

The pushbutton switch (TOUCH2) energizes a temperature maintenance system.  As long as the pushbutton is depressed, the system should operate.  If the switch is deactivated, the entire system should shut down.

If the temperature drops below _______(to be provided), the lamp under the temperature sensor should come on and the fan should be turned off.  If the temperature is above __________(to be provided), the lamp should be turned off and the fan should come on.  This system should run continuously until the TOUCH2 sensor is deactivated.

Contestants will be allowed one trial run.  The second run will be considered final and the program and solution will be judged.

NOTE: The program is to be written on the programming forms provided.  The program will be entered into the computer exactly as it is written on the forms provided.

OUTPUTS
 Port “A” Controls the fan motor.
   Set the power level to 8
   Set the direction to left
 

 Port “B” Controls the heat lamp
 
INPUTS
 
 Port 1  Is connected to the temperature sensor
 
 
 Port 2  Is connected to the touch control switch.
 
 

WRITING THE PROGRAM
 The sheet labeled “procedures center” represents the top screen of the Logo software.
 The sheet labeled “Control Center” represents the bottom screen of the Logo software.