NE555 adjustable duty cycle pulse frequency square wave signal generator module - Function and benefits A versatile NE555 based module that provides a square wave signal for experimental development. It delivers an adjustable pulse suitable for MCU timing and to control associated circuitry, helping you tailor signal timing to your projects with a compact, easy-to-use module. - Electrical specifications Input Voltage: 5-15 VDC Input Current: >100 mA Output Current: 15 mA @ 5 VDC, 35 mA @ 12 VDC - LED indicator Output LED indicator is low-level active: the LED lights when the output is at a low level and is off when the output is high. The frequency is low when the LED flashes. - Controls and adjustment The module includes 4 jumpers and 2 variable resistors, allowing you to adjust the output waveform to achieve your desired duty cycle and frequency easily. - Practical applications - Generate timing references for MCU firmware development and testing - Provide a tunable test signal for breadboard circuits and low-power logic experiments - Characterize circuit responses and experiment with duty-cycle dependent behavior in simple control or timing circuits - Consistency and compatibility Uses the NE555 timer framework to produce a stable square wave. Compatible with 5-15 V DC supplies and designed to drive small loads directly, suitable for experimental development and signal generation for related circuitry.