Download Input

What we will do today:
• Give examples of input devices.
Input Devices
• An input device in an electric circuit
transforms some form of energy into
electrical energy which is then passed
into the circuit.
• Examples of input devices are
microphones, solar cells and
thermocouples.
Input Devices
Input Device
Energy transformation
Microphone
Sound energy  Electrical
Energy
 Electrical
Energy
 Electrical
Energy
Solar cell
Thermocouple
Solar Cell
• A solar cell is an input device that
acts by transforming light energy into
electrical energy
Solar Cell
Area exposed (%) Voltage (V)
0 (fully covered)
25
50
75
100
Thermocouple
• A thermocouple is an input device,
constructed of two wires of
different metals, which transforms
heat energy into electrical energy.
What have we learned?
• We can now give examples of input
devices and state their energy
changes.