Technology Applied Control Systems t 4 Galway Education
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Technology Applied Control Systems © t 4 Galway Education Centre
Applied Control Systems Furby the intelligent toy? – exhibits complex interactive behaviour Inputs Outputs Push switches D. C. Motor L. D. R. Speaker Microphone Infrared LED Tilt switch Infrared detector Process - Microcontroller © t 4 Galway Education Centre 2
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) © t 4 Galway Education Centre 3
Applied Control Systems PICAXE-08 PICAXE-18 X PIC 16 F 628 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 LOGICATOR INPUT PROCESS OUTPUT © t 4 Galway Education Centre 4
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 © t 4 Galway Education Centre 5
Applied Control Systems • 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 ? © t 4 Galway Education Centre 6
Applied Control Systems Hardware: Computer – USB port (Windows NT, ME, 2000, XP) Circuit board – PICAXE 18 X Training board Power supply unit - 9 V, 550 m. A Download cable - USB AXE 027 Software: PIC - Logicator Version 2 © t 4 Galway Education Centre 7
Applied Control Systems PICAXE 18 X Training Board (5 inputs, 8 outputs) Outputs Inputs 3 Analogue: - 8 LED outputs LDR 1 Piezo Var. Resistor 1 Seven segment Temp. Sensor 2 External motors 4 External outputs 2 Digital: - 1 Stepper motor 2 PTM Switches 1 Server motor © t 4 Galway Education Centre 8