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1. Orient the PC board as shown in the parts layout diagram with the five larger "pad" areas in a row
along the bottom.
2. Install C2, 47 uF. Observe polarity. Electrolytic capacitors have polarity markings. Generally,
capacitors will indicate the ( - ) with a black stripe or arrow, while PC boards will usually show the ( + )
hole.
3. Install R2, 47K (yellow-violet-orange).
4. Install C1, .01 or .02 uF. The holes for C2 are spaced far apart (you'll see why later) so just stretch
C1's leads to fit.
5. Install R1, 47K (yellow-violet-orange).
6. Install Q1, green power transistor. The metal back-side of Q1 must face as shown or your siren won't
work.
7. Install Q2, the black NPN transistor. Transistors always have to be installed in a certain way. Be sure
you position the flat side as shown.
8. Check your work - especially the soldering. Let's hook it up!
SM3—4
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