Elenco electronics, inc, Quiz – Snap Circuits K-24 User Manual
Page 8
Elenco Electronics, Inc.
150 W. Carpenter Avenue
Wheeling, IL 60090
(847) 541-3800
http://www.elenco.com
e-mail: [email protected]
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 ________.
Answer
s:
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