Alarm Wiring Assembly and Pocket Pattern
G`\qf;J`i\e Piezo siren
";0M + 9V
2¼"
½"
Piece A
(top panel)
½"
;;
Jn`kZ_; JGJK Switch (SPST)
4¾"
6¾"
Top
31"
¼"
Piece B
(pocket front, back,
sides, and bottom)
4"
¼"
34"
Bottom
4"
24"
MATERIALS
Purse
Leather or vinyl scraps to match or contrast
with purse
Fabric scraps
Velcro
Barge cement or other heavy-duty glue for leather
12V DC 102dB Piezo Siren audible alarm RadioShack
part #273-079 or similar from All Electronics
( allelectronics.com)
9V battery
9V snap connector RadioShack #270-325 or similar
Push-on, push-off switch All Electronics #PB- 166,
RadioShack #275-1565, or similar
1" heat-shrink tubing RadioShack #278-1611
or similar
22-gauge wire
Thread
TOOLS
Leather punch
X-Acto knife, Olfa knife
Ruler
Wire strippers
Paper and pencil for patterns
Lighter or heat gun
Soldering iron, solder
Sewing machine
Chalk, tape, paper clip
2" exposed. Make a paper pattern first to test the
fit. The leather should be approximately 1 ¼" wide
at the top to allow for the switch, and taper down to
1" at the bottom. Fold the leather in half lengthwise
and sew it together, then slide the 22-gauge wires
through using an unbent paper clip.
1d. Strip the wire ends of the snap connector and
the siren, leaving ½" exposed. Attach the snap
connector to the battery. Place a 1" length of heat-shrink tubing over the black wire from the siren,
then twist this wire to the black wire from the snap
connector. Fold the twisted pair back on itself, slide
the heat-shrink tubing over the connection, then
use a lighter or heat gun to shrink the tubing around
the connection.
Using the same method, connect one of the
switch wires to the red wire on the siren, and
connect the other switch wire to the red wire on
the snap connector. Use 2 short and 2 long pieces
of heat-shrink tubing to cover as much of the
exposed wire as possible. Test your alarm. It should
be ear-piercingly loud.
2. Make the fabric pocket.
2a. Use the pattern diagram above and cut 2 pieces
115 Make:
