KNACRO Signal Generator 1-Channel 1Hz-150KHz PWM Pulse Frequency Duty Cycle Adjustable Module LCD Display with Switch

Size: 3 * 1.65 * 1.45in (78 * 42 * 37mm) Work Voltage: DC 3.3V-30V Frequency Range (Normal mode): 1Hz ~ 150KHz Frequency Range (Precise mode): 1Hz ~ 15KHz Frequency Accuracy: 2% Duty Cycle Accuracy: 1% at Normal mode Duty Cycle Accuracy: 0.1% at Precise mode Duty Cycle Range: 0.00% -100% Output Current: About 5-30mA Output Amplitude: Same to input voltage Work Temperature: -104 ° F ~ 185 ° F (-40 ° C ~ 85 ° C) Work Humidity: 0% ~ 95% RH Using Step: 1. Connect to power supply 2. Press rotary switch for 10second to switch Normal mode and Precise mode 3. Short press rotary switch to set frequency and change value by rotating switch 4. Press rotary switch for 2second to set duty cycle 5. Keep press for 5second to lock set parameters 6. Test 7. Press button ‘ON / OFF’ to turn on or off PWM output 8. Remove power and connect load to use module. This Signal Generator has two work modes: Normal Mode & Precise Mode. For the Operation Methods of Frequency Range Setting & Duty Cycle Range Setting, please check the PDF file at the "Technical Specification" Section on the product page.