Futaba FASST on 8FG. HFP current draw... - RC Groups
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Apr 11, 2012, 06:59 AM
Retired Air Traffic Controller
Webheadfred's Avatar

Futaba FASST on 8FG. HFP current draw...

Good morning folks! The build is coming along and I wanted to throw a few questions out there.

I'm using a Futaba 8FG Super and the R6208SB reciever. Has anyone used the FASST mode with the HFP? I've also managed to get the S-BUS working with the PWM converter. Can I use these extra channels with the HFP?

Also, is 1 amp enough current for the Hoverfly Pro board and or the GPS board? I'm considering building a linear supply just for those controllers. I realized the ESC had switching supplies after seeing the torrid and reading the manual for the ESC. (imagine that!) I thought I could eliminate a little noise with a few parts laying around.

Best regards,
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Apr 11, 2012, 08:28 AM
A man with too many toys
It says 7.4v battery or regulated power but does not list current. I expect that it is way lower than 1 amp.

Apr 11, 2012, 08:53 AM
Retired Air Traffic Controller
Webheadfred's Avatar
Thanks RC... I was more wondering about the current draw on the HFP and GPS boards. With all the components, I'm thinking it may be at least close to 1 amp.
Apr 11, 2012, 09:43 AM
Retired Air Traffic Controller
Webheadfred's Avatar
Well that was about dumb since the ESC's are only used to power the reciever. I can just power the reciever and not use the ESC BEC function. DOH!
Apr 11, 2012, 03:47 PM
I'll fly anything...
Efliernz's Avatar
I recommend no matter what you do that you check the rx voltage with a meter with everything connected.

I made a little video for the CopterControl forum demonstrating why you should use separate ubecs for the camera servos and why you should always check the voltage. I was going to use some small and cheap HK ubecs for the rx and control board but found that even 500mA-1A on a "3A ubec" took the voltage below 5v!


Openpilot Multicopter voltage testing / board malfunction (4 min 42 sec)


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