1MAIN PURPOSE: Voltage to frequency module, the voltage frequency pulse signal can generate different frequency according to the input level. 2010V TO 01KHZ: Frequency analog voltage signal module can convert 010V voltage into 010KHz frequency pulse signal. 3EASY OPERATION: Wide range of input controllable voltage and frequency, can be input directly without series resistance. 4SIMPLE WIRING: The signal conversion module has clear wiring terminals, has stable connection and less interference. 5COMPACT SIZE: The conversion board has a compact size, with mounting holes, easy to install and does not take up space. Item Type: Voltage to Frequency ModuleWorking Voltage: 13.5V-30VInput Controllable Voltage Range: 0-10VOutput Frequency Range: 0-10KHzSize: Approx. 33 x 34mm / 1.3 x 1.34inWiring Instructions: VCC: Working powerGND: Power groundF: Input frequency pulse signalVOUT: Output corresponding voltageGND: Output groundIndication: The frequency pulse signal is connected to F, and there is a corresponding voltage output at the VOUT end.Input and Output Correspond: 100Hz=1V1KHz=10V 1 x Voltage to Frequency Module If there is correspondence deviation in the during use, you can adjust the potentiometer on the board for calibration..Items from Sheng Xinshun's shop