Elenco Whooper Alarm User Manual download pdf

WHOOPER ALARM KIT

MODEL K-24

Instruction & Assembly Manual

No part of this book shall be reproduced by any means; electronic, photocopying, or otherwise without written permission from the publisher.

Elenco

Electronics, Inc.

Elenco

Electronics, Inc.

150 Carpenter Avenue

Wheeling, IL 60090

(847) 541-3800

Website: www.elenco.com

e-mail: elenco@elenco.com

QUIZ

1. The Whooper Alarm has ___________ oscillators.

2. The low frequency oscillations are generated by transistors __________ and __________.

3. The high frequency oscillations are generated by transistors __________ and __________.

4. When the power is first turned on, the voltage at the base of Q2 is ___________.

5. When the power is first turned on, the voltage across C1 is ___________.

6. Capacitor C1 charges through resistor _______ and discharges through resistor __________.

7. The charge to discharged ratio on C1 is ___________.

8. Capacitor C3 causes transistor Q3 and Q4 to _____________.

9. The frequency of oscillation of Q3 and Q4 is about ____________ cycles per second.

10. The speaker is driven by transistors ________ and ________.

Answers: 1) two; 2) Q1, Q2; 3) Q3, Q4; 4) 5.4V; 5) zero; 6) R2, R8; 7) 22:1; 8) oscillate; 9) 1,000; 10) Q4, Q5

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-6-TROUBLESHOOTINGConsult your instructor or contact Elenco®Electronics if you have any problems. DO NOT contact your place ofpurchase as they will n

-2-ASSEMBLE COMPONENTS TO THE PC BOARDFigure BCut two 4” wires and strip 1/8” ofinsulation off of both wires. Solder awire to each lug of the speaker

-4--3-MINIATURE RADIO TRANSMITTERThe Whooper Alarm puts out a wavering sound that is sure to startle anintruder. It can be used independently or as a

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Elenco Whooper Alarm User Manual