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What is the red, brown and yellow line of Yin Yan 8.5g steering gear?

Red: positive pole of power supply

Brown: ground wire

Huang: Signal line.

Spring steering gear;

Red: positive pole of power supply

Black: ground wire

White: signal line

General voltage range: 4.8-6.0

Signal PWM range: duty ratio: 1000us-2000us period T=20MS.

Steering gear in spring:

General voltage range: 4.8-6.0

Signal PWM range: duty ratio: 900us-2 100us period t = 20 ms.