Lesson Plan Digital Electronics

Topics: Multivibrator, Flip-flop, Timer Pages: 4 (492 words) Published: February 26, 2012
At the end of the lesson, the students shold be able to:
1. Learn the functions of monostable multivibrator;
2. Apply the knowledge in making their own circuit; and
3. Discriminate the monostable multivibrator from other types of multivibrator.


Major Concept:Multivibrators
Sub-concept:Monostable Multivibrators
* http://www.eleinmec.com/article.asp?4
* http://www.allaboutcircuits.com/vol_4/chpt_10/8.html
* Tirol, Benjo, Learning Digital Electronics Thru Experiments - Manila : Electronics Hobbyists Publishing , 2002, pp. 123-126 Materials:printed materials for visual aids, breadboard & power supply, capacitors, resistors, transistor, LED, wires, switch


A. Preparatory Activities
1. Daily Routine
a) Prayer b) Greetings
c) Checking of Attendance
d) Collecting of Assignment
2. Review
1) What does BCD stands for?
2) What is the difference between an encoder and decoder?
B. Developmental Activities
1. Motivation
* “Pinoy Genius”
2. Lesson Proper

* Definition of Terms

* Multivibrators - an electronic circuit used to implement a variety of simple two-state systems such as oscillators, timers and flip-flops. * Stable - state of output where the device is able to latch or hold to forever, without external prodding. * Monostable - often called a one shot multivibrator is a pulse generating circuit in which the duration of this pulse is determined by the RC network connected externally to the 555 timer. In a stable or standby state, the output of the circuit is approximately zero or a logic-low level. When external trigger pulse is applied output is forced to go high.

* Building a Monostable Circuit using 555 Timer

* How to compute the time the output remains high
t = 1.1(R x C)

3. Application
The students will...
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