Data Sheet

-129-
343. Monolithic IC
Connect points C and D with the 1kW resistor (42) in project #342.
Press the press switch (61) for a while and you will hear gun shots.
Release the press switch (61) and wait for a while. You will eventually
hear the gun shots start breaking up and fading out. The IC in the 3-in-1
(11) is a monolithic IC, which means all the circuitry for producing the
sounds is contained in a single silicon chip.
344. Hybrid ICs
Connect points A and B with the 4-wire (4) in project #342. Press the
press switch (61) for a while and you will hear the re siren. Release
the press switch (61) and wait for a while. You will eventually hear the
re siren start breaking up and fading out. More advanced circuits than
in your 3-in-1 (11) may require several silicon chips, where the use of a
Hybrid IC would incorporate multiple silicon chips into a single package.
345. Rectier
Connect points E and F with a 4-wire (4) in project #342. Press the press
switch (61) for a while and you will hear space battle sounds. Release the
press switch (61) and wait for a while. You will eventually hear the space
battle sounds start breaking up and fading out. If you installed alkaline
batteries in your set, you will probably see that they last pretty long. That’s
because the power draw for most of the circuits you build is not too large,
and as long as you don’t leave your circuit on for a very long time then
the batteries should last a while. But some real-world applications of DC
circuits like the ones you built here require the circuit to be on all the
time. In this case you would want to be able to plug the circuit into an AC
outlet in your house and not worry about batteries. A rectier converts AC
power from your house outlets to DC power just for this purpose.
346. Alkaline Batteries
Connect points G and H with a 4-wire (4) in project #342. Press the press
switch (61) for a while and you will hear music. Release the press switch
(61) and wait for a while. You will eventually hear the music start breaking
up and fading out. For long battery life, it’s always recommended to use
Alkaline batteries. Alkaline batteries have a higher energy density for the
same voltage level than zinc-carbon batteries. This is accomplished using
a different type of electrolyte. Zinc batteries are mostly composed of
ammonium chloride while the alkaline batteries use potassium hydroxide.
[ 343 - 346 ]