thanks a lot DuaneB for your information. but here my problem is how do i designed my own rc receiver just for feeding the rc hobby gyro with PWM signal? thats mean my rc receiver only applied for 1 application only that is feed PWM signal to the rc hobby gyro. i use the rc hobby gyro with heading lock here.. the information you give me is only retrieving the signal from the RC receiver only, but here i want to create a signal that is similar with the signal come from that RC receiver. do you have any idea bout this? i'm stuck with this problem so long. i want to use this signal to operates the rc hobby gyro with rc servo to make pan tilt system for my dslr camera. pan tilt system sold out there are too expensive for me and i see someone use the rc hobby gyro the futaba gy401 with the servo to do it, but i dont know how can i do like that.. 