Data Sheet

The speaker (93) converts electricity into sound. It does this
by using the energy of a changing electrical signal to create
mechanical vibtrations (using a coil and magnet similar to
that in the motor). These vibrations create variations in air
pressure which travel across the room. You “hear” sound
when your ears feel these air pressure variations.
The E-Blox
®
Circuit Builder™ plated adaptor (101) block
is used to connect to other E-Blox
®
series.
The volume (38) block contains two 50kW resistors,
adjustable from 200W to 50kW. In series with the center
tap is a 200W resistor to limit the current.
Some types of electronic components can be super-
miniaturized, allowing many thousands of parts to fit into
an area smaller than your fingernail. These “integrated
circuits” (ICs) are used in everything from simple
electronic toys to the most advanced computers.
The FM radio (24) contains an integrated FM radio
circuit. Refer to the figure below for the pin-out description:
The power amplifier IC (14) block is a module containing
an integrated circuit amplifier and supporting
components that are always needed with it. A description
of it is given here for those interested:
The three-in-one (11) block is a module containing
specialized sound-generation ICs and other supporting
components (resistors, capacitors, and transistors) that
are always needed with them. This was done to simplify
the connections you need to make to use them. The pin
descriptions are given here for those interested; see the
projects for connection examples:
-12-
More About Your E-Blox
®
Circuit Builder™ Parts
Three-in-One
T1, T2 - control inputs
SP1 - speaker – connection
SP2 - speaker + connection
I/O1 - music select
I/O2 - space sound select
(+) - power to batteries
(–) - power return to batteries
FM Radio:
(+) - power from batteries
(–) - power return to batteries
RF - antennta input
VOL - volume adjust connection
CH+ - tune up
CH– - tune down
OUT-L - left channel output connection
OUT-R - right channel output
See project #116 for
an example of proper
connections.
Power Amplifier IC
(+) - power from batteries
(–) - power return to batteries
OUT-L - left channel output connection
OUT-R - right channel output
IN-L - left channel input
IN-R - right channel input
EBX120_Manual_042817 5/17/2017 10:54 AM Page 13