["brand new and high qualityr Features:r Drive LED, motor, solenoid value and other loads directly.r Can be used to adjust frequency and duty cycle, fit for regulating the brightness of LED and the motor's speed.r Two modes can be chose: PWM: regulating frequency (continuous) and duty cycle.The number of pulses can not be set in this mode, and the pulse is cycle on or off. PULSE: positive pulse width for time, negative pulse width for time, power-on delay start for time, and number of pulses are adjustable.r With start and stop button, can control the output and stop of the signal.r Widely used in industrial for DC motor speed regulation, industrial conveyor belt speed regulation, lighting and lighting mediation, computer power supply cooling, for DC fans, etc..r r r Specification:r Model: ZK-PP2Kr Material: PVC and Fiber glass boardr Size: app.79 x 43 x 30mm/3.11 x 1.69 x 1.18inr Working voltage: 3.3-30V r Frequency range: 1Hz-150KHz, the accuracy is about 2%. Motor speed control generally chooses 20KHZ.r Duty cycle range: 0-, 1% stepping.r Number of pulses: 1-9999, or for infinity (display '----' stands for infinity).r Delay output time: 0.000s-9999s, the minimum can be set 1ms.r Positive and negative pulse width length: 0.000s-9999s, the minimum can be set 1ms.r Output load capacity: less than 8A (MOS switch tube).r Output amplitude: The amplitude is equal to the supply voltage (OUT+ is directly connected to the V+ module).r Color: As picture shownr Quantity: 1 Pcr r Module r I Button operation instructions:r 1. MOS tube switch type output, no waveform;r 2. The number of open times reaches the set value, the output is automatically stopped, and 'out 'disappears;r 3. Press the On button to control the start and end of the out put. OUT disappears to indicate no output, Output shutdown;r 4. Power-on reset of ON button to turn on the output, recalculate the number of open times;r r II PWM mode (display has "%" for PWM mode)r 1. The factory default mode is PWM mode, FREQ+ and FREQ-key set frequency, DUTY+ and DUTY-button set duty cycle; short press STOP r button control signal output or stop, stop output is 0, the screen displays "OUT" mark as There is output, otherwise it stops output; the default r factory frequency is 1KHZ and the duty cycle is 50%.r 2. If you want to switch to PULSE mode, long press the SET button (more than 6 seconds), do not release, you will see the screen change, "%" r disappears, it is PULSE mode.r r III PULSE mode (No "%" on the right side of the display is PULSE mode)r 1. The line above the LCD screen displays the positive pulse width for time. The P+ and P- buttons set the parameter. The line below the LCD screen r displays the negative pulse width for time. The N+ and N- buttons set the parameter. Press the STOP button to control the signal output or stop. r When the output is stopped, the output is 0. The screen displays "OUT" for output, otherwise it stops output; the default factory positive pulse r width is 0.5 seconds and the negative pulse width is 0.5 seconds.r 2. Pulse number and delay for time setting - In PULSE mode, press and hold the SET button for 2 seconds and then release, enter the pulse number r and delay for time setting interface, the screen displays SET, it will be turned off and cleared after entering. ;P+ and P- buttons set the delay for time, N+ r and N- buttons set the number of pulses, the factory default delay for time is 0 seconds, the number of pulses is infinite (display ----); then press SET r button 2 In seconds, it will automatically return to the pulse interface, press the STOP button, after the delay setting for time, start to issue the set r number of pulses. If the number of pulses is sent, it will automatically output 0. If the period is not sent, pressing the STOP button will turn off. r The output pulse is turned off and cleared, and the set number of pulses is issued each for time it is started.r r IV Application Operation Examplesr 1. PWM output 20KHZ, 60% duty cycle: Select PWM mode, the frequency is set to 20.00, and the duty ratio is set to 060%.r 2. The output is turned on for 0.6 seconds and turned off for 0.2 seconds. Infinite loop: select PULSE mode, the positive pulse width is set to 0.600, r the negative pulse width is set to 0.200, the delay for time is set to 0.000, and the number of pulses is set to --- -.r 3. Power on or press the start button, delay 5 seconds, then the output is turned on for 0.6 seconds, off 0.2 seconds, infinite loop: select PULSE r mode, positive pulse width is set to 0.600, negative pulse width is set to 0.200, delay The for time is set to 5.000 and the number of pulses is set to -- r --.r 4. Power on or press the start button, delay 5 seconds, then output high level 10ms low level 10ms pulse 100: select