Texas Instruments NE555 Precision Timers IC (SMD Package)

In the time-delay or monostable mode of operation, the timed interval is controlled by a single external resistor and capacitor network. In the astable mode of operation, the frequency and duty cycle can be controlled independently with two external resistors and a single external capacitor. The threshold and trigger levels normally are two-thirds and one-third, respectively, of VCC. These levels can be altered by use of the control-voltage terminal. When the trigger input falls below the trigger level, the flip-flop is set, and the output goes high. If the trigger input is above the trigger level and the threshold input is above the threshold level, the flip-flop is reset and the output is low. The reset (RESET) input can override all other inputs and can be used to initiate a new timing cycle. When the output is low, a low-impedance path is provided between discharge (DISCH) and ground. Operation is specified for supplies of 5 V to 15 V. What's included: 12 Pieces of NE555P 12 NE555P Texas Instruments Astable or Monostable Operation Adjustable Duty Cycle