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actually this is to be expected. with no load, the diodes produce no
drop.
if you're worried, try hooking a DC motor (or other real load -- light
bulb, 10 ohm resistor, etc). across the servo motor supply and then
measure the voltage. you should see the 6v.
fred
> I started to look at the specs to hook up a Futaba servo (6V), and found
> that with no load, the servo ports are at 10V. OK, with no servo
> current, I expect little voltage drop across the diode string, but the
> top of the diode string (on the expansion board), i.e. the HB main
> battery, is at 11.3V!
>
> The HB seems to work just fine, but I'm concerned about hooking up my 6V
> servo to a 10V sourse. I've yet to load the servo ports with a resistor
> or something to see if that brings it down, but even with a 0.7v/diode
> drop, we'd be significantly high.
>
> Am I misunderstanding the schematics?
>
> Thanks,
> Kevin
> --
> Kevin Nickels <kevin@dime.engr.trinity.edu>
> Assistant Professor, Engineering Science
> Trinity University, San Antonio TX, USA
>
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Message is in Reply To:
 | | Overcharged battery?
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| I've got a pre-assembled Gleason Research HB with expansion board, and have a couple questions. We've left it plugged in (on normal charge mode) for a week or so. I started to look at the specs to hook up a Futaba servo (6V), and found that with no (...) (27 years ago, 15-Mar-00, to lugnet.robotics.handyboard)
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