Item specifics
Description
NE555 Pulse Frequency Duty Cycle Adjustable Module Product Overview
This module is a versatile square/rectangular wave signal generator based on the NE555 timer IC, designed for experimental development, stepper motor driving, and MCU clock signal generation. It features four selectable frequency ranges via jumper caps and two onboard potentiometers for frequency and duty cycle adjustment, covering an output frequency range from 1Hz to 200kHz. An LED indicator on the output provides clear signal status: LED on for low level, off for high level, and flashing at low frequencies. With compact dimensions of 31mm × 22mm, it is ideal for various electronic projects and educational experiments.
NE555 Pulse Frequency Duty Cycle Adjustable Module Key Features
Core Chip: Built around the NE555 timer IC, offering stable and reliable performance. Maximum operating frequency exceeds 500kHz, with timing range from microseconds to hours. Output current up to 200mA (source or sink).
Wide Input Voltage: Supports DC 5V to 15V (5V-12V recommended). Output current: ≥15mA at 5V, ≥35mA at 12V. Input current requirement: ≥100mA.
Four Frequency Ranges: Selectable via jumper caps:
Low range: 1Hz ~ 50Hz
Medium range: 50Hz ~ 1kHz
Medium-High range: 1kHz ~ 10kHz
High range: 10kHz ~ 200kHz
Frequency & Duty Cycle Adjustment: Two onboard potentiometers for adjusting output frequency and duty cycle. Duty cycle is adjustable but not independently adjustable from frequency – adjusting duty cycle will affect frequency.
LED Output Indicator: LED indicator on the output – lights up at low level, turns off at high level, and flashes at low frequencies.
Adjustable Output Amplitude: Output amplitude varies with input voltage, ranging from 4.2V V-PP to 11.4V V-PP.
NE555 Pulse Frequency Duty Cycle Adjustable Module Applications
This module is widely used in:
Square Wave Signal Generation: For experimental development
Stepper Motor Driving: Generating square wave signals for stepper motor drivers
MCU Clock Source: Generating adjustable pulses for MCU use
Adjustable Pulse Control: Controlling related circuits
NE555 Pulse Frequency Duty Cycle Adjustable Module Key Advantages
Based on the classic NE555 timer IC, it delivers stable and reliable performance with a maximum frequency of 500kHz and up to 200mA output current. The four frequency ranges with jumpers, combined with onboard potentiometers, enable continuous frequency adjustment from 1Hz to 200kHz. The LED output indicator provides clear signal status for easy debugging. With compact size (31mm × 22mm) and wide voltage input (5V-15V) , it suits various power scenarios. Low cost and easy to use – no programming required to generate stable square/rectangular wave signals. An ideal tool for electronics enthusiasts, students, and engineers for circuit experiments, stepper motor driving, and signal source building.
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FAQ
1 What is this module
It is a pulse frequency and duty cycle adjustable module based on the NE555 chip, capable of generating square wave and rectangular wave signals for stepper motor driving and MCU pulse control.
2 What is the input voltage of the module
The DC input voltage range is 5V to 15VDC and the input current must be greater than or equal to 100mA.
3 What are the output amplitude and output current
The output amplitude varies with the input voltage and is in the range of 4.2V VPP to 11.4V VPP. At 5V supply, the output current is approximately 15mA and at 12V supply it is about 35mA.
4 What are the size and core chip of the module
The module measures 3.1 centimeters by 2.2 centimeters and the core circuit is built around the NE555 timer IC.
5 What are the frequency range selections
There are four ranges which are low frequency from 1Hz to 50Hz, medium frequency from 50Hz to 1kHz, medium high frequency from 1kHz to 10kHz, and high frequency from 10kHz to 200kHz.
6 Can the duty cycle be adjusted independently
The duty cycle can be fine tuned but it is important to note that the duty cycle and frequency cannot be independently adjusted and adjusting the duty cycle will simultaneously change the output frequency.
7 What is the function of the output LED indicator
The module has an output LED indicator. It lights up at a low level output and turns off at a high level output and it flashes when the output frequency is very low.
8 How to calculate the output frequency
The calculation formula is that the period T equals 0.7 multiplied by the sum of RA and twice RB and then multiplied by the capacitance C. The resistance of RA and RB can be adjusted from 0 to 10 kilo ohms while the capacitance C is replaced according to the selected frequency range.
9 Is this module suitable for driving stepper motors
Yes it is suitable. It is specifically designed for generating square wave signals and its output pulses can be directly used as control signals for stepper motor drivers.
10 What are other applications for this module
Besides driving stepper motors, it can also be used as a square wave signal generator for experimental development, for generating adjustable pulses for microcontrollers MCUs, or for controlling other related circuits.