EE question: convert RS232 voltages to RC servo

[Hugh Meyer]

Ether,

As Eric said the input is an opto isolator. If you look at the schematic for the Jaguar, it is very similar, but not identical. A few years ago I made a device that would drive the victors and found it required about twice as much current as the Jaguars. I wanted the same device to drive either.

On your drawing you didn't say if the other side of the input was going to + vcc or gnd. If it is going to gnd, then 1200 will not supply enough current.

I will try to dig up the stuff I used. Seems like I remember it needed to be in the 400 ohm range.

-Hugh