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== Introduction to Electronics == | |||
== Assignment 1: electric resistance and conductivity== | == Assignment 1: electric resistance and conductivity== | ||
'''555 timer in astable mode''' with speaker and different conductive materials | '''555 timer in astable mode''' with speaker and different conductive materials | ||
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schematic for 555 timer in astable mode with speaker and different conductive materials | schematic for 555 timer in astable mode with speaker and different conductive materials | ||
[[File: | [[File:555_astable_2_small.jpg]] | ||