Enhance your electronic projects with this versatile Pulse Frequency Generator, designed for precise and adjustable frequency output with clear LED indication. Compact and practical, this frequency generator features a reliable NE555 main chip, delivering stable square wave signals with adjustable pulse widths to suit a variety of applications. Key Features: · LED Output Indication: The built-in LED provides clear visual feedback—off when the output is low and blinking at low frequencies—making frequency monitoring simple and convenient. · Adjustable Frequency Range: Easily select from four frequency ranges (Low: 1Hz–50Hz, Intermediate: 50Hz–1kHz, Medium-High: 1kHz–10kHz, High: 10kHz–200kHz) using the shorting cap, allowing continuous fine-tuning of the output frequency. · Stable Square Wave Signal: Generates precise square wave pulses with adjustable parameters, ideal for testing, signal processing, and other electronic applications. · Compact and Practical Design: Measuring just 2.9 x 3.6 cm (1.14 x 1.42 in) and weighing approximately 10g, this pulse frequency generator is lightweight and easy to integrate into various projects. · Wide Compatibility: Suitable for multiple equipment types and scenarios, offering flexible use in DIY electronics, educational experiments, and professional setups. · Adjustable Components: RA and RB resistors adjustable from 0 to 10K ohms, with capacitance values varying by frequency range (0.001µF to 100µF), enabling customized frequency calculations and outputs. Specifications: · Item Type: Pulse Frequency Generator · Main Chip: NE555 · Size: 2.9 x 3.6 cm (1.14 x 1.42 in) · Fixing Hole Distance: 22.5 x 30.5 mm (0.89 x 1.2 in) · Weight: Approx. 10 g (0.35 oz) · Input Current: ≥100mA · Output Current: ≥15mA (5V power supply, V-PP > 50%), ≥35mA (12V power supply, V-PP > 50%) · Output Frequency Ranges:  - Low Frequency: 1Hz – 50Hz  - Intermediate Frequency: 50Hz – 1kHz  - Medium and High Frequency: 1kHz – 10kHz  - High Frequency: 10kHz – 200kHz Package Includes: · 1 x Pulse Frequency Generator This Pulse Frequency Generator is an essential tool for anyone needing accurate and adjustable frequency signals. Its compact size, LED indication, and wide frequency range make it ideal for electronics testing, signal generation, and experimental projects, providing reliable performance and ease of use.