IC 555 Timer Chip

Above all, 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

Firstly, it was designed by  Hans Camenzind in1971.

Secondly, the chip is in toys, house appliances, electronic devices, etc.  

In addition, the chip’s operating modes: are bistable, monostable, and astable mode.

Basic idea: Touch on/off IC 555 timer circuit

For instance, 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


In conclusion, 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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