【Adjustable Frequency Output】 Easily adjust output frequency via onboard potentiometer. Frequency range: 10Hz to 5KHz, suitable for timing, pulse generation, and waveform shaping. 【Stable NE555 Timer IC Core】 Built around the reliable NE555 chip for precise and consistent pulse generation in single-channel mode. 【Wide Operating Voltage: 5–12V】 Works with both 5V and 12V systems, making it compatible with most Arduino boards, microcontrollers, and embedded systems. 【Plug-and-Play Ready】 Compact board size (29mm x 12mm) with onboard LED indicator and potentiometer. No programming required—adjust and use instantly. 【Great for Smart Cars & DIY Projects】 Perfect for controlling motor pulses, smart car signals, or general signal simulation in hobbyist and educational projects. This Oiyagai NE555 Adjustable Frequency Module (5-pack) is a must-have for Arduino and embedded system enthusiasts. Each module generates a single-channel PWM signal with adjustable frequency using an onboard potentiometer, powered by the classic NE555 timer chip.

With a working voltage of 5–12V and a frequency range of 10Hz to 5KHz, these modules are suitable for tasks like motor speed control, LED dimming, pulse simulations, timing circuits, and more.

The module includes an LED indicator for visual feedback and requires no code or external programming. Simply connect power, adjust the trimpot, and you’re ready to test and prototype. Compact and beginner-friendly, these modules are ideal for Arduino projects, robotics (e.g., smart cars), signal generation, and electronics education.