SteenbeckDigital wrote:
>
> Found a article about RtLinuX and RC-servos.
> Tryed the example with a 300MHz Pentium and
> could hear the machines load from the servo.
> Using a professional RC-servo I could
> even see the machines load.
> The jitter is slightly to big for this.
Not exactly. Some Mainboards are bad designed:
when moving the mouse, there are current
peaks, that lowers the +5Volt a little bit.
Consequently, the high-level of the CMOS/TTL-Output
is not at a stable voltage. Many RC-Servos don't like
this (I had this experience several times and it was
mentioned in the article as well).
Use a 74LS245 with its _own_ power supply to
buffer the signals, or write a "busy-loop-programm":
main() {for(;;);};
Then you shouldn't hear that much (maybe then you hear
nothing).
> This shows the limit of RtLinuX.
At least, it shows the limit of PC-Hardware.
RT-Linux gets the best out of it ...
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