Electronic Systems & Programmable Components

Question 1

Light Dependent Resistor

Answer 1

Resistance changes in relation to light levels
- dark - high resistance
- light - low resistance

Question 2

Thermistor

Answer 2

Resistance changes in relation to heat
- low temperature - high resistance
- high temperature - low resistance

Question 3

Microprocessor

Answer 3

Main processor inside a computer,m designed to perform DIFFERENT functions
- cannot store data

Question 4

Microcontroller

Answer 4

A chip which is placed in a circuit and programmed to perform a SPECIFIC task
- has memory & can store data

Question 5

Advantages of Microcontrollers

Answer 5

• size of circuit can be reduced
• can be reprogrammed
• have pins for connecting several outputs - flexibility

Question 6

Disadvantages of Microcontrollers

Answer 6

• often cost more the traditional integrated circuits
• programming software & hardware required
• language of the system must be learnt beforehand