To design a delay timer circuit using 555 timer IC


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  1. Click on the components button to place the component.
  2. Make connections as per the circuit diagram and pin diagram of IC.
    3. Fig. 1 Circuit diagram of Delay before Turn ON Timer
    Fig. 2 Pin diagram of IC 555
  3. Click on 'Check Connections' button. If connections are right, click on ‘OK’, then Simulation will become active.
  4. Observe the Delay Time before the circuit turns on (LED glows).
  5. Compare it with the theoretical value.
  6. Click on the 'Reset' button to reset the page.