MG995 SG90 Dual Servos Rotary Knob Serial Port Control Board 

Feature: The Dual Servos Knob Serial Port Control Board Futaba MG995 SG90 Steering Gear Debugging Module is a plug-and-play, easy-to-use servo controller with knob adjustment, reply function, serial command control, and three servo control modes. Support manual mode and return to medium mode, switch by button, with mode indicator. Support knob adjustment or serial command control in manual mode. The serial port command control can use the matching host computer software or connect to the external MCU. Specification: The onboard stable 8-bit MCU is used to generate high-resolution PWM signals with precise control. Steering gear control accuracy: 0.09 degrees (that is, PWM minimum change value 1us) Support steering gear with control period of 20ms and pulse width in the range of 0.5-2.5ms User can directly use 2S lithium battery charging head to debug and return to the steering gear. Power supply voltage range: 5-9V (Based on the actual servo supply voltage)