background image

Wiring Sequence

       

1-76, 2-3,  

4-40-58-11, 7-44, 8-43-77, 
9-16-59-66, 22-17-10, 
71-56, 68-60-57-55-24, 
70-B, 12-23-63-69-67-41,  
64-42, 65-A, 13-C

Wiring Sequence

       

1-76, 2-3, 

4-40-54-58, 7-44, 43-38-77-8 

9-16-59-62-66, 22-17-10,  

71-56, 68-60-57-55-24, 65-70  

69-67-63-61-41-23,  64-42 

53-39

63

EXPERIMENT

Darkness activated AM radio receiver
with volume control

Wiring Sequence

       

1-76, 2-3, 

42-64, 62-59-30, 11-31,  

40-60-29-4, 12-41-61-63, 

13-65, 44-7, 8-43-77

66

EXPERIMENT

Daylight activated FM radio receiver
with volume control

Wiring Sequence

       

1-76, 2-3,  

30-61-60, 11-31, 
40-62-29-4, 12-41-63-59, 
13-65, 44-7, 8-43-77, 
42-64

67

EXPERIMENT

Darkness activated FM radio receiver
with volume control

Wiring Sequence

      

1-8-43-60,  2-3, 4-29-58, 7-44, 57-20, 42-64, 63-41-12, 

21-27-59, 28-30, 65-13, 11-26-31-40

70

EXPERIMENT

Magnet control FM radio receiver with volume control

Wiring Sequence

      

1-76, 2-3, 4-39-40, 71-21, 20-42, 70-44-7, 54-43-77-8, 38-53

73

EXPERIMENT

Magnet control auto-sensor

Wiring Sequence

     

1-76, 2-3, 4-11-40-56, 12-26-41, 13-28-42, 44-7, 8-43-77, 55-46, 45-27

72

EXPERIMENT

FM radio receiver with mute function

Wiring Sequence

       

1-76, 2-3,  4-40-54-62, 7-44, 43-38-77-8, 9-16-59-66, 22-17-10,  

71-56, 68-61-60-55-24, 65-70,  23-41-69-67-63,  64-42, 53-39

62

EXPERIMENT

Daylight activated AM radio receiver with volume control

55

EXPERIMENT

Morse code training kit

Wiring Sequence

       

2-3, 4-53, 

54-39, 38-46, 1-45

56

EXPERIMENT

Boresome humming

Wiring Sequence

       

1-7-36-74, 

2-3,  26-37, 75-60-29-4, 

30-45, 28-46, 27-59-67, 

8-31-66

57

EXPERIMENT

Automobile’s “di, di” sound

Wiring Sequence

       

1-7-36-74,  

2-3, 26-37, 75-60-29-4, 

30-45, 28-46, 27-59-69,   

8-31-68

58

EXPERIMENT

Hoofbeat

Wiring Sequence

       

1-7-36-74, 

2-3, 26-37, 75-60-29-4, 

30-45, 28-46, 27-59-71, 

8-31-70

59

EXPERIMENT

AM radio receiver with mute function

Wiring Sequence

       

1-76,

2-3, 4-40-54-55-58,

7-44, 43-38-77-8, 

9-16-59-66, 22-17-10, 

71-68-60-57-24,

42-28-70,

69-67-41-26-23, 39-53, 

27-46, 45-56

60

EXPERIMENT

Big voice AM radio receiver with volume control

Wiring Sequence

       

1-76, 2-3,  

4-40-54-58, 7-44,

43-38-77-8,  9-16-59-66, 

22-17-10, 71-56,

68-60-57-55-24, 

65-70,  69-67-63-41-23,

64-42, 53-39

64

EXPERIMENT

Big voice FM radio receiver 

Wiring Sequence

       

1-76,  

2-3, 4-40-11, 12-41, 

13-42, 44-7, 8-43-77

65

EXPERIMENT

Big voice FM radio receiver
with volume control

Wiring Sequence

       

1-76,  

2-3, 4-40-11, 12-41-63, 

13-65, 44-7, 8-43-77,  

42-64

69

EXPERIMENT

Simple impact amplifier 

Wiring Sequence

       

1-76, 2-3,  4-40-54-56, 7-44, 42-64, 63-41-36-18, 

71-55-19,  8-43-77, 37-53, 65-70

68

EXPERIMENT

Big voice AM/FM radio receiver
with volume control

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Amplifier

 – An electronic circuit that amplifies the signal that is sent to it. The amplifying 

component can be a transistor, vacuum tube or appropriate magnetic device.

Battery

  –  A  source  of  energy.  It  contains  active  materials  which  will  be  irreversibly 

converted during the chemical reaction.  

Capacitance

 – A measurement of the capacity of a capacitor for storing electric charge.

Capacitor

 – A device consists of two conductors that are separated by an insulator. It is 

designed for storing electrical charge or as a filter in the circuit.

Circuit

  –  A  system  of  interconnected  components  /  devices  such  as  power  source, 

resistors, capacitors and transistors…etc. 

Diode

 – A device which is used in electric circuitry to allow an electric current to flow in 

single direction and block it in the reverse direction. 

IC

 (Integrated Circuit) – A small electronic device made of a semiconductor material and 

is  used  for  a  variety  of  devices,  including  microprocessors,  electronic  equipment  and 

automobiles.

LDR

  (Light  Dependent  Resistor)  –  A  device  with  a  layer  of  cadmium  sulphide  (CdS) 

material that changes resistance according to the amount of light shining on it.

LED

 (Light Emitting Diode) – A diode emits light when current is passing through it.

Microphone

 – A device converts sound into an electrical or acoustic signal.

Motor

 – A device converts electrical energy to mechanical motion.  

Reed Switch

 – A magnetically controlled switch made to open and close a circuit.

Resistance – 

 A measurement of the degree to which an object opposes an electrical 

current through it.

Resistor

 – A device designed for possessing resistance.

Seven-Segment  LED  Display

  –  A  display  device  which  is  commonly  used  in 

electronic circuits or equipment as decimal numeric display or indicator.

Speaker

 – A device that changes electrical signals to sound.

Switch

 – A device for opening and closing power source to a circuit.

Transistor

  –  A  semi-conductor  material  device  that  amplifies  a  signal  and  opens  or 

closes a circuit.

Variable  Resistor

  –  A  kind  of  resistor  and  a  device  of  adjustable  resistance  in 

electronic / electrical circuit.

Wire

 – A component which is used in the electronic / electrical industry as a conductor 

that is used to carry electricity or signals.

GLOSSARY

P.13

P.14

P.15

P.16

• Complete all wiring connections 

as indicated in the sequence. By 

tapping  the  push  switch,  LED 

will  flash.  This  is  equivalent  to 

Morse-Code.  By  learning  the  Morse-Code  table,  it  is 

possible to send a message out at night.

• Complete 

all 

wiring 

connections  as  indicated 

in the sequence. When the push switch is pressed, LED 

will  light  up,  and  the  loudspeaker  will  produce 

boresome humming sound like that of a mosquito.

• Complete 

all 

wiring 

connections  as  indicated 

in  the  sequence.  When 

the  push  switch  is  pressed,  LED  will  light  up,  and 

the  loudspeaker  will  produce  “di,  di”  sound  like 

that of automobile. 

• Complete 

all 

wiring 

connections  as  indicated 

in  the  sequence.  When 

the push switch is pressed, LED will light up, and the 

loudspeaker will produce hoofbeat like sound.

• Complete  all  wiring  connections  as  indicated  in  the 

sequence. Switch on the main switch. Then the LED will 

light  up.  Adjusting  the  variable  condenser  to  suitable 

position  will  allow  it  to  receive  AM  radio  signals.  By 

pressing the push switch, the radio will be mute.  Since 

AM  radio  wave  is  sensitive  towards  signal  direction, 

when the radio signal is weak, try to move the radio to 

other direction. 

Note:  If  you  cannot  receive  AM  signal  in  indoor 

area, you can go to outdoor areas and try it again.

• Complete  all  wiring  connections  as  indicated  in  the 

sequence. Switch on the main switch. Then the LED will 

light  up.  Adjusting  the  variable  condenser  to  suitable 

position  will  allow  it  to  receive  AM  radio  signals. 

Adjusting the variable resistor can change the volume. 

Since  AM  radio  wave  is  sensitive  towards  signal 

direction, when the radio signal is weak, try to move the 

radio to other direction.

Note:  If  you  cannot  receive  AM  signal  in  indoor 

area, you can go to outdoor areas and try it again.

• Complete all wiring connections as indicated in the sequence. Switch on the main 

switch. Then the LED will light up. However if the LDR is shaded, then the radio cannot 

work.  It  is  necessary  for  the  LDR  to  be  shone  by  bright  light  so  that  this  circuit  is 

connected. Adjusting the variable condenser to suitable position will allow it to receive AM radio signals. Since AM radio 

wave is sensitive towards signal direction, when the radio signal is weak, try to move the radio to other direction. 

Note: If you cannot receive AM signal in indoor area, you can go to outdoor areas and try it again.

• Complete all wiring connections as indicated in the sequence. 

Switch on the main switch. Then the LED will light up. If there are 
bright light shines on the LDR, then the radio cannot work. It is 
necessary  for  the  LDR  to  be  shaded  so  that  this  circuit  is 
connected. Adjusting the variable condenser to suitable position 
will allow it to receive AM radio signals. Since AM radio wave 
is  sensitive  towards  signal  direction,  when  the  radio  signal  is 
weak, try to move the radio to other direction. 

Note: If you cannot receive AM signal in indoor area, 
you can go to outdoor areas and try it again.

• Complete 

all 

wiring 

connections  as  indicated  in  the 

sequence. Switch on the main switch. If you press the 

button “select”, which is located at the left side of the 

panel,  then  it  will  perform  a  FM  auto-search.  The 

receiver  will  search  for  channel  from  lower  end  to 

upper  end.  It  will  stop  searching  when  it  finds  a 

channel. You may press search again to let it search 

for another channel. You will have to press the “reset” 

button if the receiver has searched to the upper most 

channel and cannot find anything. It is recommended 

to add a wire on the “FM. ANT”, which is located on 

the  left  side  of  the  panel.  The  wire  will  act  as  an 

antenna.  This  will  increase  the  strength  of  the  radio 

signal received.

• Complete 

all 

wiring 

connections  as  indicated  in  the  sequence.  Switch  on 

the main switch. If you press the button “select”, which 

is  located  at  the  left  side  of  the  panel,  then  it  will 

perform a FM auto-search. The receiver will search for 

channel  from  lower  end  to  upper  end.  It  will  stop 

searching  when  it  finds  a  channel.  You  may  press 

search again to let it search for another channel. You 

will have to press the “reset” button if the receiver has 

searched to the upper most channel and cannot find 

anything.  Adjusting  the  variable  resistor  can  change 

the volume. It is recommended to add a wire on the 

“FM.  ANT”,  which  is  located  on  the  left  side  of  the 

panel.  The  wire  will  act  as  an  antenna.  This  will 

increase the strength of the radio signal received.

•Complete  all  wiring  connections 

as indicated in the sequence. Switch on the main switch. 

The circuit is connected. However if the LDR is shaded, 

then the circuit will be disconnected and the radio cannot 

work. Therefore it is necessary for the LDR to be shone by 

bright light so that this circuit is connected. If you press the 

button  “select”,  which  is  located  at  the  left  side  of  the 

panel, then it will perform a FM auto-search. The receiver 

will search for channel from lower end to upper end. It will 

stop  searching  when  it  finds  a  channel.  You  may  press 

search again to let it search for another channel. You will 

have  to  press  the  “reset”  button  if  the  receiver  has 

searched  to  the  upper  most  channel  and  cannot  find 

anything. Adjusting the variable resistor can change the 

volume.  It  is  recommended  to  add  a  wire  on  the  “FM. 

ANT”, which is located on the left side of the panel. The 

wire will act as an antenna. This will increase the strength 

of the radio signal received.

• Complete all wiring connections as indicated in the 

sequence. Switch on the main switch. If the LDR is 
not shaded, then the radio cannot work. Therefore 
it is necessary for the LDR to be shaded so that this 
circuit is connected. If you press the button “select”, 
which is located at the left side of the panel, then it 
will  perform  a  FM  auto-search.  The  receiver  will 
search for channel from lower end to upper end. It 
will  stop  searching  when  it  finds  a  channel.  You 
may press search again to let it search for another 
channel. You will have to press the “reset” button if 
the receiver has searched to the upper most channel 
and  cannot  find  anything.  Adjusting  the  variable 
resistor can change the volume. It is recommended 
to add a wire on the “FM. ANT”, which is located 
on the left side of the panel. The wire will act as an 
antenna. This will increase the strength of the radio 
signal received.

• Complete  all  wiring  connections  as  indicated  in  the 

sequence. Switch on the main switch. If you want to 
use AM mode, connect lead A and lead B. You may 
connect  both  leads  to  an  unused  spring  for  easy 
handling. And then adjust the variable condenser to 
suitable position for receiving AM channels. Since AM 
radio wave is sensitive towards signal direction, when 
the radio signal is weak, try to move the radio to other 
direction. If you want to use FM mode, connect lead A 
and lead C. You may connect both leads to an unused 
spring  for  easy  handling.  Press  the  button  “select”, 
which is located at the left side of the panel, then it will 
perform a FM auto-search. The receiver will search for 
channel  from  lower  end  to  upper  end.  It  will  stop 
searching  when  it  finds  a  channel.  You  may  press 
search again to let it search for another channel. You 
will have to press the “reset” button if the receiver has 
searched to the upper most channel and cannot find 
anything. It is recommended to add a wire on the “FM. 
ANT”, which is located on the left side of the panel. 
The wire will act as an antenna. This will increase the 
strength of the radio signal received.
For  both  AM  and  FM  mode,  adjusting  the  variable 
resistor  can  change  the  volume.  This  circuit  enable 
users to switch between AM and FM easily.

Note  :  If  you  cannot  receive  AM  signal  in 
indoor  area,  you  can  go  to  outdoor  areas 
and try it again.

• Complete all wiring connections as indicated in the sequence. Switch on the main 

switch. Use the magnetic pole to access the reed switch. The circuit is then connected 
and  transferring  the  signal  of  loudspeaker  to  the  input  terminal,  loudspeaker  is 
producing self-coupled self-excited oscillating sound.

• Complete all wiring connections as indicated in the sequence. Switch on the main 

switch.  LED  will  light  up.  Slightly  scratch  the  buzzer.  You  will  find  that  the 
loudspeaker is amplifying the scratching sound. You may also beat the buzzer to hear 
the amplified sound of impact on the buzzer. Adjusting the variable resistor can change the volume. This principle 
can be used for security systems. People can fix a buzzer on the door, on the car door or on the window. Then if 
the door or window has been forced, loudspeaker will produce amplified impacting sound.

• Complete all wiring connections as indicated in the sequence. Use the magnetic 

pole to access the reed switch. If you press the button “select”, which is located 
at the left side of the panel, then it will perform a FM auto-search. The receiver will search for channel from lower end to 
upper end. It will stop searching when it finds a channel. You may press search again to let it search for another channel. 
You will have to press the “reset” button if the receiver has searched to the upper most channel and cannot find anything. 
Adjusting the variable resistor can change the volume. It is recommended to add a wire on the “FM. ANT”, which is 
located on the left side of the panel. The wire will act as an antenna. This will increase the strength of the radio signal 
received.

• Complete all wiring connections as indicated in the sequence. Switch on the main 

switch. If you press the button “select”, which is located at the left side of the panel, 
then it will perform a FM auto-search. The receiver will search for channel from lower 
end to upper end. It will stop searching when it finds a channel. You may press search again to let it search for another 
channel. You will have to press the “reset” button if the receiver has searched to the upper most channel and cannot find 
anything. By pressing the push switch, the radio will be mute. It is recommended to add a wire on the “FM. ANT”, which 
is located on the left side of the panel. The wire will act as an antenna. This will increase the strength of the radio signal 
received.

65

63

64

v- 43

sp 44

I/O

42

G

41

v+

40

4

3
2

1

7

8

29

31

30

27

28

26

59

60

100K

VI 13

V- 12

V+ 11

T

R

20

21

57

58

10K

71

70

10UF

v- 43

sp

44

I/O

42

G

41

v+

40

4

3

2

1

76

77

20

21

7

8

53

54

1k

39

38

v- 43

sp 44

I/O

42

G

41

v+

40

4

3

2

1

7

8

76

77

VI 13

V- 12

V+

11

T

R

27

28

26

55

56

5K1

46

45

Wiring Sequence

       

1-8-43-60, 2-3,  4-29-48, 7-44, 42-64, 63-41-12,  27-47-59,  

28-30,  65-13,  11-26-31-40

71

EXPERIMENT

Touch control FM radio receiver with volume control

• Complete all wiring connections as indicated in the sequence. Touch the touch 

plate with your finger. Note that if there is no response, you may need to dampen your finger first before touching. Then 
the circuit will be connected. If you press the button “select”, which is located at the left side of the panel, then it will 
perform a FM auto-search. The receiver will search for channel from lower end to upper end. It will stop searching when 
it finds a channel. You may press search again to let it search for another channel. You will have to press the “reset” 
button if the receiver has searched to the upper most channel and cannot find anything. Adjusting the variable resistor 
can change the volume. It is recommended to add a wire on the “FM. ANT”, which is located on the left side of the panel. 
The wire will act as an antenna. This will increase the strength of the radio signal received.

65

63

64

v- 43

sp 44

I/O

42

G

41

v+

40

4

3
2

1

7

8

29

31

30

27

28

26

59

60

100K

47

48

VI 13

V- 12

V+ 11

T

R

P.16

MADE IN CHINA

© 2008 AMAZING TOYS LTD. ALL RIGHTS RESERVED.

COLORS AND CONTENTS MAY VARY

website : 

www.amazing-toys.com.hk

If at any time in the future you should need to dispose of this product please note that Waste electrical products should not be disposed of 

with  household  waste.  Please  recycle  where  facilities  exist.  Check  with  your  Local  Authority  or  retailer  for  recycling  advice.  (Waste 

Electrical and Electronic Equipment Directive)

Wiring Sequence

       

1-21, 2-3,  4-40-54-58, 7-44, 43-38-20-8, 9-16-59-66, 22-17-10, 71-56, 

68-60-57-55-24, 65-70  23-41-63-67-69, 64-42, 53-39

61

EXPERIMENT

Magnet control AM radio receiver with volume control

65

63

64

9

10

59

60

100K

69

68

0.1UF

71

70

10UF

57

58

10k

16

17

23

24

22

v- 43

sp 44

I/O

42

G

41

v+

40

4

3

2

1

7

8

67

66

0.02UF

20

21

53

54

1K

39

38

55

56

5k1

• Complete all wiring connections as indicated in the sequence. Switch on the main switch. Use 

the magnetic pole to access the reed switch. The circuit is connected and LED will light up. 

Adjusting the variable condenser to suitable position will allow it to receive AM radio signals. Adjusting the variable 

resistor can change the volume. Since AM radio wave is sensitive towards signal direction, when the radio signal is weak, 

try to move the radio to other direction. 

Note: If you cannot receive AM signal in indoor area, you can go to outdoor areas and try it again.

62

61

65

63

64

9

10

59

60

100K

67

66

0.02UF

69

68

0.1UF

71

70

10UF

57

58

10k

16

17

23

24

22

v- 43

sp

44

I/O

42

G

41

v+

40

4

3

2

1

7

8

76

77

53

54

1K

39

38

55

56

5k1

Summary of Contents for 32072

Page 1: ......

Page 2: ...T R O N E X Connects to the circuit T R O N E X Connects to the circuit No 32072 No 32072 7 2 7 2 7 2 Amazing Amazing Science Workshop Science Workshop More than 72 exciting educational experiments ...

Page 3: ...le to build your understanding through experimenting and maybe trying out some interesting experiments on your own This electronic circuit kit contains more than 72 experiments and it is smartly designed that the main circuit board unit has all the relevant electronic components included All you have to do is simply connect the wires according to the wiring sequence of each experiment and follow t...

Page 4: ...ound with red LED 37 Magnet control motor dory sound with green LED 38 Magnet control ship sound with LED 39 Magnet control electronic metronome with LED 40 Manual control electronic metronome with LED 41 Manual control motor dory sound with red LED 42 Manual control motor dory sound with green LED 43 Manual control ship sound with LED 44 Manual control delayed motor dory sound 45 Magnet control d...

Page 5: ...polarity Do not use rechargeable batteries Non rechargeable batteries are not to be recharged Re chargeable batteries are only to be charged under adult supervision Re chargeable batteries are to be removed from the toy before being charged Different types of batteries or new and used batteries are not to be mixed Exhausted batteries are to be removed from the toy The supply terminals are not to b...

Page 6: ...76 1 4 EXPERIMENT Diode and capacitor charging discharging Wiring Sequence 2 76 50 51 77 75 49 45 39 46 37 52 1 36 38 74 6 5 M 2 1 76 77 2 EXPERIMENT Color filter in parallel with red LED light Wiring Sequence 2 6 52 51 39 1 76 5 77 38 5 EXPERIMENT LED light Wiring Sequence 2 3 4 35 34 77 1 76 6 EXPERIMENT Basic circuitry of LED light Wiring Sequence 1 34 2 3 35 38 46 45 39 77 4 76 6 5 M 2 1 76 77...

Page 7: ...ble resistor to a point which just will not trigger the color filter to rotate This time clap near the microphone or blow to the microphone or simply speak loudly will cause the color filter to rotate Complete all wiring connections as indicated in the sequence Switch on the main switch and touch the touching plate with your finger The circuit will be connected and motor will begin to rotate If to...

Page 8: ...h on the main switch Green LED will light up while red LED will not Shade the LDR a little bit green LED will become dimmer Shade the LDR a bit more then green LED will extinguish and red LED will start to light dimly When the LDR is covered completely green LED will extinguish and red LED will light up completely This principle can be used as light indicator to reflect the amount of light shining...

Page 9: ...se components will get overheated Complete all wiring connections as indicated in the sequence Switch on the main switch LED will light up Then cover the LDR completely LED will extinguish Do not uncover the LDR and wait After a while LED will light up again And then if you uncover the LDR the statue will be just like the beginning of the experiment You can repeat the experiment without switching ...

Page 10: ...ill light up At the same time the capacitor is being charged Remove the magnetic pole The triode can still be conductive for some time as the capacitor will release the stored electricity Therefore the LED will not extinguish immediately after you remove the magnetic pole Complete all wiring connections as indicated in the sequence Switch on the main switch Touch the touch plate with finger You ma...

Page 11: ... some time the LED will light up again If you want to repeat the experiment just press the push switch again Complete all wiring connections as indicated in the sequence Switch on the main switch Then touch the touch plate with finger The circuit will be connected and thus the speaker will produce motor dory sound At the same time red LED will light up When the finger is removed from the touch pla...

Page 12: ...uit is disconnected and thus everything will stop Complete all wiring connections as indicated in the sequence Switch on the main switch Then use the magnetic pole to access the reed switch The circuit will be connected and thus the speaker will produce ship sound At the same time LED will light up When the magnetic pole is removed from the reed switch the circuit is disconnected and thus everythi...

Page 13: ...time LED will light up And then release the push switch The circuit is disconnected and thus everything will stop Complete all wiring connections as indicated in the sequence Switch on the main switch Press the push switch The circuit will be connected and thus the speaker will produce motor dory sound And then release the push switch The circuit is disconnected However the motor dory sound will s...

Page 14: ...ill affect the sound and the brightness of the LED Complete all wiring connections as indicated in the sequence Switch on the main switch The LED will light up and loudspeaker will produce cicada like sound Adjusting the variable resistor for changing the resistance will affect the sound tone and the brightness of LED Complete all wiring connections as indicated in the sequence Switch on the main ...

Page 15: ...l produce di di sound like that of automobile Complete all wiring connections as indicated in the sequence When the push switch is pressed LED will light up and the loudspeaker will produce hoofbeat like sound Complete all wiring connections as indicated in the sequence Switch on the main switch Then the LED will light up Adjusting the variable condenser to suitable position will allow it to recei...

Page 16: ...again Complete all wiring connections as indicated in the sequence Switch on the main switch If you press the button select which is located at the left side of the panel then it will perform a FM auto search The receiver will search for channel from lower end to upper end It will stop searching when it finds a channel You may press search again to let it search for another channel You will have t...

Page 17: ...al received Complete all wiring connections as indicated in the sequence Switch on the main switch If you want to use AM mode connect lead A and lead B You may connect both leads to an unused spring for easy handling And then adjust the variable condenser to suitable position for receiving AM channels Since AM radio wave is sensitive towards signal direction when the radio signal is weak try to mo...

Page 18: ...m lower end to upper end It will stop searching when it finds a channel You may press search again to let it search for another channel You will have to press the reset button if the receiver has searched to the upper most channel and cannot find anything By pressing the push switch the radio will be mute It is recommended to add a wire on the FM ANT which is located on the left side of the panel ...

Page 19: ...rophone A device converts sound into an electrical or acoustic signal Motor A device converts electrical energy to mechanical motion Reed Switch A magnetically controlled switch made to open and close a circuit Resistance A measurement of the degree to which an object opposes an electrical current through it Resistor A device designed for possessing resistance Seven Segment LED Display A display d...

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