Page 4 of Realistic Police Siren Kit by Ramsey Electronics

SM3 4 SM3 4 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! 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!

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