Data Sheet

-56-

90. Music Loudness

Reduction

Build the circuit shown and turn

ON the switch (62). Music will play

at a reduced volume because the

resistance in the lamp (76) is in

series with the speaker (93) and

reduces the voltage across the

speaker.

91. Parallel LED

Resistance

Press the switch (62), you will hear

some music in medium volume from

the speaker (93) with the lamp (76)

and LED (69) on. Remove the LED

(69) and notice the loudness does

not change. This is because the LED

(69) is in parallel with the speaker

(93) and lamp (76).

92. Mr. Magnet’s Birthday

Replace the press switch (61) with the reed switch (83) and turn the power on with switch (62). Put the magnet (7) on

the reed switch (83) and do not move it. The birthday song will play as long as the magnet is on the switch. Remove the

magnet (Mr. Magnet leaves the party) and the birthday song will stop.

93. Birthday Party Disc Jockey

Turn ON the switch (62). Use one nger and tap the touch plate (80) to make the music start over and over again. You

can make up a birthday rap song while starting over and over.

Note: You may need to

twist the LED (69) heart

attachment to clear the

speaker (93) so it ts

properly.

1st level

2nd level