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Old 06-09-2010, 09:18 PM   #1
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Hitec SPC System

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Has anyone tried out the Hitec Optima Rx SPC (Supplementary Power Connection) System?

I am curious to know if you feed in the main battery power supply to the receiver (say 6S @ 22.2V), does the main voltage display on the Tx through the built-in telemetry system? Right now, it shows my BEC voltage on the Tx.

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Old 06-09-2010, 09:56 PM   #2
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Re: Hitec SPC System

Tried it through the SPC port. It displayed the voltage for the SPC battery. I wonder if you were to put a Y in line between the battery and receiver to spit the power. Run one line unregulated into the SPC to Power the Receiver and run the second one over to the Battery connection and regulate it down to 6 volts. Not sure if this would work but would allow for one battery and reading on the transmitter is true to the SPC battery power. Not sure if you were to power the SPC first then power the channel 7/9 Battery connection it will hold the SPC as priority display voltage.
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Old 06-10-2010, 12:40 AM   #3
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Re: Hitec SPC System

There is a diagram on page 21 of the manual. Sounds like it matches the way that you were connecting your main battery and the BEC.

When powering on, I think it doesn't matter if you power on the SPC first or the BEC first as the Rx will not be taking in the +6V from BEC anymore. The BEC will only be used to feed the servos.

And according to your testing, if the Tx is showing the SPC input voltage, then I can actually use this feature to monitor the main battery voltage/usage while airbourne.

What a good idea!!
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