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TOPIC 1: INTRODUCTION TO 555 TIMER







                  INTERNAL CIRCUITRY  OF 555 TIMER












                                                                     Source:www.CircuitsToday.com


































                                          Figure 1.3: Internal Circuitry of 555 timer





              It consists of voltage divider circuit, two comparators, a flip flop,

              a discharge transistor, and an output circuit.



























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