Check the listing for details. NE555 Duty Cycle and Frequency Adjustable Square Wave Module DIY Kit. Condition: New. Listed at 0.99 USD. NE555 Duty Cycle and Frequency Adjustable Square Wave Module DIY KitProduct Image: Product Description: Description 100% brand new and high qualityModule Scope:-Used as a square wave signal generator produces a square wave signal for the experimental development use.-Used to generate the square wave signal to drive a stepper motor drive.-Produce adjustable pulse for the MCU to use.-Generating adjustable pulse to control the associated circuits.A brief description:-Size: 3.5CM * 3.6CM-The main chip: NE555;-Input voltage: 5V-15VDC. 5V power supply, the output current can about 15MA; 12V power supply, the output current can be so 35MA;-Input Current: ? 100MA-Output amplitude: 4.2V V-PP to 11.4V V-PP (depending on the input voltage, the output amplitude is not the same)-Maximum output current:? 15MA (5V power supply, V-PP greater than 50%), ? 35MA (12V power supply, V-PP greater than 50%)Advantages:-Output with LED indication, there is no output LED quantity (low straightforward, high level LED off relatively low frequency LED flashes);-Output frequency range grade optional continuously adjustable output frequency;-Low-frequency stall: 1Hz ~ 50Hz-IF stall: 50Hz ~ 1kHz-In the high-frequency stall: 1KHz ~ 10kHz-High-frequency stall: 10kHz ~ 200kHz-the output duty cycle can fine-tune the duty cycle and frequency is not adjustable separately adjust the duty cycle will change the frequency-the output frequency is adjustable;-Cycle T = 0.7*(Ra + 2*Rb)*C-Ra, Rb:0-10K adjustable;-LF gear C = 0.001UF;-IF file C = 0.1UF;-In the high-frequency file C = 1UF;,-High-frequency gear C = 100UF, the waveform frequency buyers can own calculations. Package Include:1PCS New NE555 Duty Cycle and Frequency Adjustable Square Wave Module DIY Kit FeedbackWarrantyShipmentFeedbackWe appreciate your feedback very much. As it will motivate us do better. If you have any questions with our goods or service, Please kindly contact us firstly before leaving negative feedback. Thank you in advance Warranty1. All merchandise will be carefully test before shipping. We will try our best to avoid any quality problem. 2. We promise warranty for quality in one year and we will repair it free of charge. The returning shipping should be paid by customer. 3. If you are not satisfied with the product, Please contact us. We'll provide you a satisfying solution.Shipment1.Normmly we will send the goods within 1-3 working days after your payment is verified . 2.Please check if the goods are in good condition and sign before the delivery man leaves.If you find the product is lost or damaged on the way. Please take photo and let the delivery men confirm it. Then we will help you let the shipping company compensate you.On Nov 10, 2022 at 06:21:14 PST, seller added the following information: