User Manual

Turn on the slide switch (S1); the display on the LED-MC (U29) shows
“00”. Press the A button on the selector (S8) to increase the ones digit
on the display, and press the C button on the selector to increase the
tens digit on the display. When the display shows “21”, press the B
button on the selector to start.
Strange sounds will be heard on the speaker (SP2), and three LEDs
(D1, D2, & D10) change in sync with the sound.
-35-
Project 63
Tri-Light
Funky Siren (II)
Use the preceding circuit, but add
a connection between the points
marked B & C using a jumper
wire. The sound is different now.
Use the preceding circuit, but
remove the connection between B
& C, and add a connection
between C & D. The sound is
different now.
Use the preceding circuit, but
remove the connection between C
& D, and add a connection
between A & D. The sound is
different now.
Use the project 62 circuit, but
connect the end of the black
jumper wire to point D instead of
point C. The sound is different
now.
Project 64
Tri-Light
Funky Siren (III)
Project 65
Tri-Light
Funky Siren (IV)
Project 66
Tri-Light
Funky Siren (V)
Project 62
Tri-Light Funky Siren
Two of the LEDs are on or off at
the same time, and the other one
is opposite them - can you tell
which?