untitled

SPST normally open (NO) momentary push button switch (S4)

Holtek HT12E encoder (IC1)

1 megohm resistor (R1)

TWS-434 RF transmitter module

We bought this at Reynolds Electronics (www.rentron.com); Hobby

Engineering (www.hobbyengineering.com) carries a similar module.

400-contact breadboard

One 4 AA battery pack with snap connector

Five 2-pin terminal blocks

Plastic box

We use Radio Shack part #270-1806.

An assortment of different lengths of prestripped short 22 AWG wire

Battery

IC pack

Toggle

switch

Voltage

regulator

Transmitter module (to which

you’ve soldered the antenna)

Terminal

block

Push button

switch

Figure 13-5:

Key com-

ponents

of your

transmitter.

310 Part IV: Good Vibrations