NE555 Pulse Frequency Duty Cycle Adjustable Module

Description

NE555 Pulse Frequency Duty Cycle Adjustable Module Square Wave Signal Generator is 5 V square wave signal generator. It generates a square wave signal used for experimental development. Also, used to drive a stepper motor for generating a square wave drive signal.The output duty cycle can be fine-tuned. The duty cycle and frequency are not separately adjustable, adjusting the duty cycle will change the frequency.

Features: NE555 Pulse Frequency Duty Cycle Adjustable Module

• Input Voltage: 5V-15VDC
• Output amplitude: 4.2V V-PP to 11.4V V-PP.
• Output Current : 15mA for 5V & 35mA for 12V.
• Size: 31mm * 22mm.
• Minimum – 50% duty cycle, 3.7 Hz & Maximum – 98% duty cycle, 1.3KHz
• Generate an adjustable pulse for MCU.
• Generate an adjustable pulse, to control circuitry associated.
• The output current can be 15 MA around; when 12V power supply, the output current can 35 MA around
• Output with LED indication(low level, LED will on; high level, LED will off; low frequency, the LED flashes).
• Max Output Current: >= ≥15MA (5V power supply, V-PP greater than 50%), >=35MA (12V power supply, V-PP greater than 50%)

The output frequency is adjustable:

• Period T = 0.7 (RA +2 RB) C
• RA, RB is 0-10K adjustable;
• Low profile when C = 0.001UF;
• IF stalls C = 0.1UF;
• High-frequency file C = 1UF;
• HF stalls C = 100UF;
• So buyers can calculate the frequency of the waveform.

Application: NE555 Pulse Frequency Duty Cycle Adjustable Module

• As a square wave signal generator generates a square wave signal used for experimental development.
• Used to drive a stepper motor for generating a square wave drive signal.
• Generate an adjustable pulse for MCU.
• Generate an adjustable pulse, to control circuitry associated.

Package Includes :
1 x NE555 Pulse Frequency Duty Cycle Adjustable Module Square Wave Signal Generator

NE555 Module Features & Operation:

• Size: 31mm * 22mm(1.2″ x 0.9″)
• Main chip: NE555
• Input Voltage (VCC): 5V-15VDC
• Input current:~100MA
• Output amplitude: 4.2V V-PP to 11.4V V-PP. (Varies 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. When the frequency is higher than about 30Hz, the LED will appear to be always on since the blinking is too fast to see.
• There is a 4-row x 2-pin header that provides jumper settings to select different frequency ranges. The jumper connects different value capacitors in the circuit to change the RC time constant of the circuit. The multi-turn potentiometer near the frequency range jumper provides fine control over the frequency once the range is set.
• Jumper settings are:
  ~1Hz ~ 40Hz
  ~40Hz ~ 500Hz
  ~500Hz ~ 40kHz
  40kHz ~ >200kHz
• The jumper ranges will vary between modules depending on the tolerances of the components used.
• 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