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NE555 Pulse Frequency Duty Cycle Adjustable Module

NE555 Pulse Frequency Duty Cycle Adjustable Module

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NE555 Pulse Frequency Duty Cycle Adjustable Module Square Wave Signal Generator

There are 4 jumpers and 2 variable resistors on the module, users can adjust the output wave with these components, to get their ideal wave easily.


  • Input Voltage: 5V-15VDC. when power supply is 5V , the output current can be 15MA around;when 12V power supply, the output current can 35MA around
  • Input current: >=100MA
  • Output amplitude: 4.2V V-PP to 11.4V V-PP. (Different input voltage, the output amplitude will be different)
  • Maximum output current: >=15MA (5V power supply, V-PP greater than 50%), >=35MA (12V power supply, V-PP greater than 50%)
  • Output with LED indication(low level ,LED will on; high level,LED will off;low frequency, the LED flashes)
  • The output requency range is selectable:
    LF file: 1Hz ~ 50Hz IF file: 50Hz ~ 1kHz
    High-frequency file: 1KHz ~ 10kHz
    HF file: 10kHz ~ 200kHz
  • Cycle T=0.7 (RA+2RB) C (RA, RB for 0-10K adjustable)
    Low frequency:C=100UF; Intermediate frequency:C=1UF
    M-H frequency: C=0.1UF; High frequency: C=0.001UF


Before changing the frequency, please power off


  • Used as a square wave signal generator, offer the square wave signal for the use of the experimental development.
  • Used to produce driving stepper motor drives, offer the square wave signal.
  • Adjustable pulse for the use of MCU.
  • Generate adjustable pulse control circuit.