PROJECTS: RFID TEDDY BEAR
makeprojects.com/v/28
MAKE IT.
BUILD YOUR OWN
CHARLIE’S BEAR
Time: 1 Day
Complexity: Easy
1. ASSEMBLE THE LECTRONICS
1a. Solder the Wave Shield
together, following the
instructions at ladyada.net/
make/waveshield. At the step
where you screw the plastic
volume dial onto the housing,
just insert the screw without
the plastic dial, and turn it
to maximum volume level.
1a
1b. Cut and strip 4 wires
about 6"– 8" long, and solder
them to the 4-pin connector,
leaving the other ends bare.
Mark the connector positions
Vcc, Enable, SOut, and GND,
to match the RFID reader’s
serial header, and connect
red and black wires to voltage
and ground, respectively.
1b
1c. If your battery holder has wire leads, solder its red wire to the inner terminal of the barrel connector (power plug) and its black wire to the outer
terminal. (If it has a 9V connector, solder the wires from
a 9V battery snap.)
Screw the housing onto the
plug and wrap the wires with
electrical tape if needed to
hold things firm. Solder the
wires to the 9V battery clip
and insulate with more tape.
1c
110 Make: makezine.com/28
NOTE: The length of the
wires isn’t critical, but leave
enough room to place the
RFID sensor in the bear’s
chest and have the wires
come out the back to reach
the rest of the electronics.
