1. Applied Control Systems Technology

2. © t 4 Galway Education Centre 2 Applied Control Systems Inputs Push switches L.D.R. Microphone Tilt switch Infrared detector Furby the intelligent toy? – exhibits complex interactive behaviour Outputs D.C. Motor Speaker Infrared LED Process - Microcontroller

3. © t 4 Galway Education Centre 3 Applied Control Systems Microcontroller – PIC (Peripheral Interface Controller) A PIC is an IC which can be programmed to respond to one or more inputs and control one or more outputs, i.e. ‘a computer on a chip’ A PIC contains on board: - ROM (Read Only Memory) RAM (Random Access Memory) I / O (Input / Output) CPU (Central Processing Unit)

4. © t 4 Galway Education Centre 4 How are PICs used? Purchased blank Inserted into a circuit board A control program is developed and tested on the computer and downloaded to the PIC. Applied Control Systems PICAXE-08 PICAXE-18X PIC 16F628 INPUTPROCESSOUTPUT PIC LOGICATOR

5. © t 4 Galway Education Centre 5 Applied Control Systems PIC Applications: - Household appliances - Washing machines / microwaves Alarm systems Medical equipment Vehicle subsystems - engine management / remote locking Traffic lights Car barriers Entertainment industry Vending machines Display units

6. © t 4 Galway Education Centre 6 Advantages of PICs :- PICs can be repeatedly programmed and reprogrammed Increased reliability due to less circuitry requirements Rapid product changes can be made by changing the program and not the electronic hardware Greater product flexibility and adaptability Provides a platform to support the development of simple to complex solutions i.e. What If ? Applied Control Systems

7. © t 4 Galway Education Centre 7 Applied Control Systems Hardware: - Computer – USB port (Windows NT,ME,2000,XP) Circuit board – PICAXE 18X Training board Power supply unit - 9V, 550mA Download cable - USB AXE027 Software: - PIC - Logicator Version 2

8. © t 4 Galway Education Centre 8 Applied Control Systems PICAXE 18X Training Board (5 inputs, 8 outputs) Inputs 3 Analogue: - LDR Var. Resistor Temp. Sensor 2 Digital: - 2 PTM Switches Outputs 8 LED outputs 1 Piezo 1 Seven segment 2 External motors 4 External outputs 1 Stepper motor 1 Server motor