NE555 Adjustable Module Duty Cycle Pulse Frequency Square Wave Signal Generator

UMT Media
Availability: 71 In Stock
Modules / Sensor
UMT Media

Item Specifics

CONDITION: New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging is applicable). If the item comes direct from a manufacturer, it may be delivered in non-retail packaging, such as a plain or unprinted box or plastic bag. See the seller's listing for full details. See all condition definitions



EAN: 614614933342


MPN: Does Not Apply


This NE555 square wave pulse generator module can be used to produce square wave signals for experimental development, or in applications such as driving stepper motors, and as an adjustable pulse for microcontroller (MCU) applications.
Only 31mm x 22mm (1.2" x 0.9"), the board features an NE555 timer chip configured in four frequency ranges, 1Hz to 50Hz, 50Hz to 1kHz, 1kHz to 10kHz and 10kHz to 200kHz all adjustable with onboard jumpers and two trim-pots to adjust the output frequency and the duty cycle.
Input voltage to the module (VCC) is variable from 5V to 15V DC and draws approximately 15mA at 5v (35mA at 12v) with an output amplitude of 4.2V peak-to-peak to 11.4V peak-to-peak based on the supply voltage.
An indicator LED illuminates on a low-level output and flashes relative to the output frequency. At higher frequencies, the LED will appear to be on solid and without a visible flash.


  • Size: 31mm * 22mm
  • Main chip: NE555
  • Input Voltage (VCC): 5V-15VDC
  • Input current:~100MA
  • Output amplitude: 4.2V V-PP to 11.4V V-PP. (Varries with VCC voltage)
  • Maximum output current: 15MA (VCC=5V, V-PP greater than 50%), 35MA (VCC=12V, V-PP greater than 50%)

    Output LED indicator (low level, LED is on, high level, LED is off; LED flashes with frequency

    The output frequency is continuously adjustable using the onboard jumpers and potentiometers. Jumper settings are:

  • 1Hz ~ 50Hz
  • 50Hz ~ 1kHz
  • 1KHz ~ 10kHz
  • 10kHz ~ 200kHz

    The output duty cycle can fine-tuned using the onboard potentiometers. Duty cycle and frequency are not separately adjustable; adjusting the duty cycle will change the frequency

The output frequency and duty cycle are adjusted using the following variables:

  • Period T = 0.7 (RA +2 RB) C
  • RA, RB are 0-10K Ohm adjustable potentiometers
  • 1Hz ~ 50Hz: C = 0.001UF
  • 50Hz ~ 1kHz: C = 0.1UF
  • 1KHz ~ 10kHz: C = 1UF
  • 10kHz ~ 200kHz: C = 100UF


    As a square wave signal generator for experimental development
    Used to drive a stepper motor for generating a square wave drive signal
    Generate adjustable pulses for microcontrollers (MCU)

Package Includes:

    1X NE555 Duty Cycle Adjustable Pulse Frequency Square Wave Signal Generator Module 

UMT Computers Ltd
Unit 4 Ground Floor Meridian House,
Nazeing Glass Works Estate,
EN10 6SX
United Kingdom
VAT ID GB 700209102

Company registration number: 3446134
VAT number: GB 700209102
I provide invoices with VAT separately displayed.
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