Thanks Keith! If the parts I need to fix up Floyd arrive in time (little doubt), I'll be at XPRS in Black Rock Sept 13-15th to fly him on a K700 to ... out of sight.
On Sat, Jul 27, 2013 at 4:43 PM, Keith Packard <kei...@keithp.com> wrote: > Peter Hackett <peter.hack...@cal.berkeley.edu> writes: > > > I was at LDRS32 last weekend and used my TeleMetrum for the first time. > WRT > > deployment and data logging, it worked flawlessly. > > Yay! > > > However before the flight I tried to do Monitor Idle over the radio > > link (while still under the Easy-Up while prepping my rocket) > > and I couldn't get it to work. Just to make sure things were working > > well enough to fly with it, I plugged into into the computer via > > USB and the status was all green. > > You may actually have had things too close together -- we don't have any > automatic transmitter power adjustment stuff working, so if the radio > signal is too strong, it's like someone screaming in your ear. Usually > 10-12 feet is sufficient, unless the antennas are pointed right at each > other. > > > I turned it off and plugged it into the USB to get it to change > > but the orange light didn't light up. I tried various computers > > and stand alone USB chargers, but I never saw the charge > > light go on. > > If the battery voltage is too low, the charger won't go into 'fast > charge' mode, which is what the light indicates. It's being careful to > not make the battery explode... > > > I did a monitor idle and found that the battery voltage was > > "red" (I think around 3.5V) > > Yeah, that's pretty darn low :-) > > > Even though the charge light wasn't on, I left it plugged into > > a USB cable (while turned off) and checked it every hour or three. > > > > When on and monitor idle, the battery voltage would read a little > > higher each time I checked. Eventually (10 to 12 hours) > > it got to ~ 3.7 and I tried to do a radio link ... and it worked jut > fine. > > (Grr) > > Sounds like the battery was successfully recharged. Presumably the RF > environment at home was enough different that it started working. > > > Is ~ 4.1V normal? > > That's a fully charged battery. > > > And RE the radio link. Any thoughts on why I couldn't get it to > > work at LDRS (at Black Rock Nv)? > > I'd bet you were just too darn close. Hard to know without having been > there. > > > It was hot (up to 114 degrees at LDRS) could this effect > > the radio link? > > I can't think of how it would... > > -keith >
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