The NE555 Adjustable Frequency Duty Cycle Signal Generator Module is a low-cost, highly versatile hardware tool used to generate square and rectangular wave signals. It operates as an astable multivibrator based on the classic NE555 timer IC.

Technical Details

• Main Chip: NE555 precision timer IC
• Input Voltage: 5V 15V DC
• Input Current: 100mA
• Output Amplitude: 4.2V V-PP to 11.4V V-PP
• Output Current:
  • ~15mA (5V supply, V-PP >50%)
  • ~35mA (12V supply, V-PP >50%)
• Output Type: Square wave / pulse signal (TTL compatible)
• LED Indicator:
  • Low level = LED ON
  • High level = LED OFF
  • Low frequency = LED flashes

Frequency Ranges

• LF: 1Hz 50Hz
• IF: 50Hz 1kHz
• HF: 1kHz 10kHz
• VHF: 10kHz 200kHz

Adjustability

• Adjustable frequency and duty cycle via potentiometers
• Duty cycle and frequency are linked (adjusting one affects the other)
• Frequency formula:
  T = 0.7 (RA + 2RB) C
• Adjustable resistors: RA, RB = 010K
• Capacitor selection for ranges:
  • Low frequency: C = 0.001F
  • Intermediate: C = 0.1F
  • High frequency: C = 1F
  • Very high frequency: C = 100F

Applications

• Square wave signal generation for electronics experiments
• PWM signal creation for control systems
• Stepper motor drive signal generation
• Microcontroller testing and simulation
• Adjustable pulse generation for circuit development