Data Sheet

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367. Low Volume Siren
Build the circuit to the left, turn on the switch (62) and you will hear a low volume
siren and the colorful LED (72) will light the ber tree (40). Turn off the switch (62)
and the siren will go off. In this circuit, the speaker (93) is in series with the 100W
resistor (41). The 100W resistor (41) limits the current through the speaker which
is why the volume is lower.
368. Lower Volume Machine Gun
Replace the 100W resistor (41) with the 1kW resistor (42) in project #367 and
connect points C and D with the 100W resistor (41) in project #367. Turn on the
switch (62) and you will hear lower volume gun shots and machine gun sounds and
the colorful LED (72) will light the ber tree (40). Turn off the switch (62) and the
sounds will go off. The 1kW resistor (42) limits the current more than the 100W
resistor (41) which is why the volume is lower in this project than in project #367.
369. Even Lower Volume Fire Siren
Replace the 100W resistor (41) with the 5.1kW resistor (43) in project #367 and
connect points A and B with the 4-wire (4) in project #367.Turn on the switch (62)
and you will hear an even lower volume re siren. Turn off the switch (62) and the
re siren will go off and the colorful LED (72) will light the ber tree (40). The 5.1kW
resistor (43) limits the current more than the 1kW resistor (42) which is why the
volume is even lower in this project than in projects #367 and #368.
370. Barely Audible Space Battle Sounds
Replace the 100W resistor (41) with the 10kW resistor (44) in project #367 and
connect points E and F with a 4-wire (4) in project #367.Turn on the switch (62)
and you will barely be able to hear space battle sounds and the colorful LED (72)
will light the ber tree (40). Turn off the switch (62) and the sounds will go off. The
10kW resistor (44) limits the current more than the 5.1kW resistor (43) which is
why you can barely hear the space battle sounds in this project.
371. Can You Hear Music?
Replace the 100W resistor (41) with the 100kW resistor (45) in project #367 and
connect points G and H with a 4-wire (4) in project #367. Turn on the switch (62).
The colorful LED (72) will light the ber tree (40), but can you hear music? Hold
your ear very close to the speaker and see if you can hear the music. Turn off the
switch (62) and the music will go off. 100kW is a lot of resistance which is why you
really have to have a good ear close to the speaker to hear the music in this circuit.
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