H446.1.1.3.input devices

H446.1.1.3.input devices

by Mr. Shingari

​Previous knowledge check

Wilf:​

You can identify Input, output and storage devices

Multiple Choice

Keyboard

• Input

• Output

• Storage

• None of the Above

Multiple Choice

USB Stick

• Input

• Output

• Storage

• None of the Above

Multiple Choice

Mouse

• Input

• Output

• Storage

• None of the Above

Multiple Choice

Speaker

• Input

• Output

• Storage

• None of the Above

Multiple Choice

CPU

• Input

• Output

• Storage

• None of the Above

Multiple Choice

Foot pedal

• Input

• Output

• Storage

• None of the Above

Multiple Choice

Braille Printer

• Input

• Output

• Storage

• None of the Above

Multiple Choice

Text to Speech Software

• Input

• Output

• Storage

• None of the Above

Multiple Choice

Microphone

• Input

• Output

• Storage

• None of the Above

Multiple Choice

CD

• Input

• Output

• Storage

• None of the Above

Multiple Choice

SD Card

• Input

• Output

• Storage

• None of the Above

Multiple Choice

The highest capacity optical storage medium is...

• CD

• DVD

• BluRay

• Magnetic Tape

Multiple Choice

A device that inputs moving images into a computer which is mainly used for video conferencing.

• Digital camera

• Video camera

• Web cam

• Film camera

Multiple Choice

What does OMR stand for?

• Optical Mark Recognition
• Optical Meter Reader
• Operator Mark Recognition
• Online Meter Reader

Multiple Choice

What does OCR stand for?

• Optical Character Reader
• Online Cloud Read
• Operating Command Recognition
• Online Cloud Recognition

Multiple Choice

What does OCR stand for?

• Optical Character Reader
• Online Cloud Read
• Operating Command Recognition
• Online Cloud Recognition

Multiple Choice

The device used to input the data from a contactless credit card

• Bar code reader

• Magnetic stripe reader

• RFID reader

• Pin Pad

​WALTs

• Describe different input devices

• Explain how different input devices can be applied as a solution to different problems

Open Ended

Give examples of keyboards that you have used or know about?

Open Ended

Which type of keyboards would be cheaper to replace ? e.g. physical (mechanical) or phones( virtual).

Open Ended

The person in the diagram is giving verbal commands to a computer using a microphone and built-in analogue-to-digital converter.

What problems might occur using speech recognition in this application? Name some situations in which this system would be useful, and some in which it would be impractical, giving reasons in each case.

Open Ended

Some modern mobile phones use what is known as OLED (Organic Light Emitting Diode) technology – this allows the screen to be curved.

Mobile phones that use this technology have what are known as AMOLED displays.

Find out the key advantages of this new technology compared to LCD screens.

http://www.oled-info.com/oled-mobile-phones)

​Walt:

​Understand wide range of Input devices

​Be able to recommend input devices for scenario given.

Multiple Choice

List of sensors:

Acoustic, Moisture/Humidity

Gas, pH

Infra-red, Pressure

Light , Temperature

• Acoustic

• urePress

• Temperature

• Moisture/Humidity

Multiple Choice

Which type of sensor would be most appropriate for group of application show below:

control the central heating system in a house

control or monitor the heat output in a chemical process

control or monitor the environmental temperature in a greenhouse

• Acoustic

• Moisture/Humidity

• Temperature

Multiple Choice

Which type of sensor would be most appropriate for group of application show below:

control or monitor the dampness of soil in a greenhouse

control or monitor the dampness of the air in a greenhouse

monitor the dampness levels in a factory making microchips

• Acoustic

• Moisture/Humidity

• Temperature

• Light

Multiple Choice

Which type of sensor would be most appropriate for group of application show below:

switch street lighting on and off at dusk and dawn

automatically switch a car’s headlights on when it gets dark

to close or open the greenhouse blinds to maintain light levels

• Acoustic

• Moisture/Humidity

• Temperature

• Light

Multiple Choice

Which type of sensor would be most appropriate for group of application show below:

Turn on a car’s windscreen wipers automatically when it starts to rain

detection of intruders in a burglar alarm system

count the number of people entering or leaving a supermarket

• Pressure

• Infra-red

• Temperature

• Light

Multiple Choice

Which type of sensor would be most appropriate for group of application show below:

detection of intruders in a burglar alarm system

checking the weight of a vehicle on a weigh bridge

measurement of air pressure to forecast weather

• Pressure

• Infra-red

• Temperature

• Light

Multiple Choice

Which type of sensor would be most appropriate for group of application show below:

pick up noise levels (e.g. footsteps) in a burglar alarm system

detect the noise of liquids dripping from a pipe in an oil refinery

monitor the sound levels in a car factory

• Pressure

• Infra-red

• Temperature

• Acoustic

Multiple Choice

Which type of sensor would be most appropriate for group of application show below:

pick up noise levels (e.g. footsteps) in a burglar alarm system

detect the noise of liquids dripping from a pipe in an oil refinery

monitor the sound levels in a car factory

• Pressure

• Infra-red

• Gas

• Acoustic

Multiple Choice

Which type of sensor would be most appropriate for group of application show below:

monitor or control the acidity levels in a chemical process

measurement of pollution levels in a river

check acidity levels in the soil in a greenhouse

• Pressure

• pH

• Gas

• Acoustic

Multiple Choice

Automatically turning street lights on at night and off during the day

• Monitoring

• Control

Multiple Choice

Changing the traffic lights at a junction to control the traffic flow

• Monitoring

• Control

Multiple Choice

Keeping track of a patient’s vital signs (e.g. heart rate, temperature) in a hospital

• Monitoring

• Control

Multiple Choice

Regulating the temperature in an air conditioning system

• Monitoring

• Control

Multiple Choice

Checking for intruders in a burglar alarm system

• Monitoring

• Control

Multiple Choice

Keeping track of the pollution levels in a river

• Monitoring

• Control

Multiple Choice

Ensuring that the anti-lock braking system in a car works effectively

• Monitoring

• Control

Open Ended

This monitoring system uses sensors and a computer to monitor the pollution levels in a river. The sensors send data to an interface box from where it is transmitted to a central computer.

The system uses oxygen level sensors and pH sensors. The people in the control room are monitoring for:

Oxygen levels in the river falling below 15%, and 

pH levels in the river going outside the range 6 to 8

Explain how the system can be used to show any trends so that action can be taken before pollution levels are exceeded.

Multiple Select

This monitoring system uses sensors and a computer to monitor the pollution levels in a river. The sensors send data to an interface box from where it is transmitted to a central computer.

The system uses oxygen level sensors and pH sensors. The people in the control room are monitoring for:

Oxygen levels in the river falling below 15%, and 

pH levels in the river going outside the range 6 to 8

Explain how the system can be used to show any trends so that action can be taken before pollution levels are exceeded.

• system stores data from sensors over a period of time

• graphs are plotted on a daily basis/statistical analysis is carried out on a regular basis

• so that operators on the control room can look for trends in pollution levels and take action if necessary

Open Ended

Street lamps switch on when it becomes dark and switch off again when it becomes light.  Name an input device that could be used for this application. 

What are the possible problems that could arise from the use of this input device? How could they be overcome?

Multiple Select

Street lamps switch on when it becomes dark and switch off again when it becomes light.  Name an input device that could be used for this application. 

What are the possible problems that could arise from the use of this input device? How could they be overcome?

• The ‘decision’ to switch the street lamp on or off involves the use of light sensors and a microprocessor.

• There should also be some mechanism to prevent the street lamps constantly flickering on and off due to heavy cloud cover 

• so on (e.g. use of a timer switch which prevents action being taken for 2 hours once street lamp switched on/off).