Thread: EE question: convert RS232 voltages to RC servo
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Unread 19-06-2012, 03:31
EricVanWyk EricVanWyk is offline
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Re: EE question: convert RS232 voltages to RC servo
Victors are opto-isolated, so really you just need to get your current in to the right range. You should be able to do this with a resistor and a(n optional?) diode (to be nice to the LED in the opto at -12V.

I'm not sure what value resistor would be best.

Your base resistor seems a bit high by my math, I'm not convinced it will turn on enough to register as a low... but my BJT math is extra rusty. I'd replace the BJT with a FET and lower the gate resistance to 100k, like the digital-age/class-D EE whippersnapper I am.