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Signal Systems 3004 tilt/motion sensor

Many vibration (also called tiltor motion) sensors are available; we used

cost and pin type as our criteria. We found this sensor at Jameco (www.

jameco.com), and Mouser (www.mouser.com) carries a similar low-

cost sensor. We chose this one because it doesn’t use a surface-mount

package, which is harder to work with.

16 ohm, 0.2 watt speaker

Electret microphone part #EM-99

We found this one at Jameco. You can use other electret microphones;

see Chapter 3 for the criteria to help you choose one. If you use another

model of microphone, you might have to adjust R3 to get the supply

voltage to the correct level.

Winbond Electronics ISD1110 voice record/playback chip (IC1)

0.01 microfarad capacitor (C1)

0.1 microfarad capacitor (C3)

4.7 microfarad electrolytic capacitor (C2)

Four^5 ⁄ 8 " 6-32 screws

Four 6-32 nuts

Three wire clips

5.1 kohm resistor (R1)

470 kohm resistor (R2)

2.2 kohm resistor (R3)

NO (normally open) momentary pushbutton switch (S1)

Breadboard (830 contacts)

SPST toggle switch (S2)

Four pack of AA batteries with snap connector

Four 2-pin terminal blocks

Enclosure

We use a wooden box 8" x 5^1 ⁄ 4 " x 3^1 ⁄ 4 ", with latches and clasp.

Velcro

An assortment of different lengths of prestripped short 22 AWG wire

Chapter 14: Couch Pet-ato 347