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The signal generator is a device that provides electrical signals with different frequencies, rectangular waves, pulses and output levels and can directly control LED/motor/solenoid valves. It can also be used as a test signal source or stimulation source. PWM mode: adjust the frequency and the duty ratio. PULSE pulse mode: set the positive and negative pulse time, the number of pulses and the delay time. Features: LCD HD display. 1 channel signal output. High precision detection Support activated/disabled output. With start-stop button. Parameter memory function: the PWM motor speed controller can automatically save the set parameters to avoid data loss after a power failure. Voltage Input:3.3-30V, Connector Cable: 5.08mm Our motor regulator supports reverse polarity protection.