hi C,
The servo pulse should occur at a 20mSec rate, the pulse will vary in width from 1mSec thru 2mSec.
The width/period of the pulse sets the servo Angle.
Look at this link.
E
https://www.jameco.com/Jameco/workshop/Howitworks/how-servo-motors-work.html

 

hi C,
The servo pulse should occur at a 20mSec rate, the pulse will vary in width from 1mSec thru 2mSec.
The width/period of the pulse sets the servo Angle.
Look at this link.
E
https://www.jameco.com/Jameco/workshop/Howitworks/how-servo-motors-work.html

Hi E,
Yes, I understand that, thanks.

I'm not sure how this CODE works, but I think it is an 8BIT 'shift register', connected directly to the 8x SERVOS, that switches so fast that it appears to switch 'say' SERVO 1 on for 'say' 1.5ms. In a similar way to a dimming LED, all in HW.
To be honest, I haven't quite understood completely, and I'm trying to make a visualisation of the CLOCK PIN and DATA PIN, invovled.
C.

 

hi C,
Are all the 8 servo's driving the same control mechanism or different control surfaces.?

E

 

hi C,
Are all the 8 servo's driving the same control mechanism or different control surfaces.?

E

Hi E,
At the moment 3x Prop Motors, 1x steering servo, 4xspare, for 'say' cameras.
C

 

Moved to the correct thread.

 

Hi E,
Yes, I understand that, thanks.

I'm not sure how this CODE works, but I think it is an 8BIT 'shift register', connected directly to the 8x SERVOS, that switches so fast that it appears to switch 'say' SERVO 1 on for 'say' 1.5ms. In a similar way to a dimming LED, all in HW.
To be honest, I haven't quite understood completely, and I'm trying to make a visualisation of the CLOCK PIN and DATA PIN, invovled.
C.

No. RC servos require a single pulse of 1 to 2 ms width to position itself. It doesn’t switch so fast it “appears” to be a single pulse. It IS a single pulse. You can use a register to update the control signal several times (quickly) as long as each of the 8x control signals stay on or off the required pulse widths.

 

No. RC servos require a single pulse of 1 to 2 ms width to position itself. It doesn’t switch so fast it “appears” to be a single pulse. It IS a single pulse. You can use a register to update the control signal several times (quickly) as long as each of the 8x control signals stay on or off the required pulse widths.

Hi D,
I'm having a lot of difficulty visualising it all, I'll get it in the end, thanks.
NOTE: As the CONSTANTS question has been asnwered anything on the 'shift register, would be better here please: https://forum.allaboutcircuits.com/...rvo-motor-output-on-18f4431-oshonsoft.186657/
C