NE555 Frequency Adjustable Pulse Generator

Classic NE555 Timer Architecture: Built around the industry-standard NE555 timer IC, generating stable, continuous square wave pulse signals for prototyping and circuit timing.

Selectable 4-Band Frequency Jumper: Features a 4-position jumper header to quickly select target frequency ranges:

Low Frequency (LF): 1Hz - 50Hz

Medium Frequency (IF): 50Hz - 1kHz

High Frequency (HF): 1 kHz - 10kHz

Ultra-High Frequency (UHF): 10kHz - 200kHz

Dual Multi-Turn Precision Potentiometers: Includes dedicated blue multi-turn trimmer potentiometers for independent, fine-tuned adjustment of signal frequency and duty cycle.

Output Status LED Indicator: Features an onboard LED indicator that flashes at low frequencies and stays illuminated at high frequencies to provide instant visual verification of output activity.

Flexible Operating Voltage Range: Functions across a broad supply range of 5V - 15V DC, making it directly compatible with 5V microcontroller logic and 12V control systems.

Direct Drive Capability: Delivers up to 15mA - 35mA output drive current, sufficient to directly trigger optocouplers, small relays, LED strings, or logic inputs.

Board & Component Construction: Double-sided FR4 PCB with DIP socketed NE555 timer IC, multi-turn blue potentiometers, status LED, 4-band jumper caps, and 3-pin headers (VCC, GND, OUT).

Technical Specifications:

Core IC: NE555 Precision Timer.

Input Voltage: 5V - 15V DC.

Input Current: >100mA.

Output Frequency Range: 1 Hz - 200kHz (adjustable across 4 jumper bands).

Output Duty Cycle: 50% - 100% adjustable.

Max Output Current: 15mA (at 5V), 35mA (at 12V).

Dimensions: 31mm x 22mm (approximate).

Usage Advice: When powered at 5V, output amplitude is approximately 5Vpp; when powered at 12V, output amplitude reaches approximately 12Vpp.

Handling & Storage: Handle by the PCB edges to prevent static discharge to IC pins. Store in an anti-static bag when not in use.

Essential Budget Pulse Source for Makers: Position as an indispensable, entry-level pulse generator for electronics hobbyists, STEM students, stepper motor testing, and MCU clock signal simulation.

Highlight Wide Frequency Range & Independent Duty Adjustment: Emphasize its 4 selectable frequency bands (1Hz - 200kHz) and dual multi-turn potentiometers as a huge value upgrade over single-resistor 555 circuits.

Recommended Cross-Sell Add-ons: Pair with NE555 Pulse Frequency Duty Cycle Adj. Square Wave Signal Generator, HW-515 DC 2CH PWM Signal Generator Module, XY-LPWM Signal Generator PWM 1Hz-150Khz 3.3V-30V Pulse Frequency Duty Cycle LCD, and DSO138 2.4" TFT Digital Oscilloscope.

High-Volume Entry Star: Feature prominently in your Signal/Frequency Module collection as a top-selling essential pulse generator board.