IC 555 Timer Chip

 The IC 555 timer chip is widely used in electronics and in various electronic circuits for its robust and stable properties.

History of the chip, it was designed by  Hans Camenzind in1971.

Application: toys, house appliances, electronic devices, etc.  

Operating modes: bistable, monostable and astable mode.

Basic idea: Touch on/off IC 555 timer circuit

This simple circuit demonstrates the comparator in the 555 timer chip.

Touch On-Off Sensor Schematic

Part list:

  1. IC 555 TimerChip
  2. LED‘s (or buzzers etc.)
  3. Resistors
  4. Breadboard
  5. Breadboard Connectors
  6. 9V battery clip


Finally, the IC 555 timer chip is an extremely robust and stable 8-pin device that produces a variety of applications such as delay timers, LED and lamp flashers, alarms and tone generation, etc.

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