MikeB wrote:You would get 24V, but still at 0.5A.
Mike.
What, my fuzzy math is wrong, again!
Hi Mike. Of course dumb me, I'm putting the 2 outputs in series to get the 24v. The currents don't double in series. The module is capable of 12 watts total.
Was I in the ball park on the charger requirements? I did those test awhile ago with batteries not at end of their discharge.
I don't know what the Taranis chargers max charge current draw is. In any case the concept is ok and there are higher current surplus DC to DC converters around. This is more of a R&D project to show another constant 12v DC source that will work on a running auto alternator.
Using a fully charged 3 cell lipo seems to work in a pinch for a short recharge boost. Just plug a lipo cell meter in the balance port to make sure you don't drain your lipo while doing a short recharge with this method.
FYI, while discussing Taranis tx charging. Off the main topic but it is used to charge my TXs.
For those that are members of an organized RC club or group, a serious RC power source. Not practical for get together flying.
6 weeks ago at my local RC field,
I added another 40 amps of solar panels to our 60A we had. This in turn charges a 20 battery 100A 12v battery bank (2000A). This is backed up by a 5Kw generator and 100A charger.
I have a wireless weather system that reports the Wx conditions every 5 min 24/7 as well as battery voltage and storage container temps.
Soon I'll have the ability to remotely control generator from home.
More for winter months when the solar charging system suffers from short days. Electric flyers are multiplying so fast that the charging system can't keep up in the winter weekends.
I still like trying new 12v charging options, the purpose of this topic. Either 12 volts into the Taranis charger, or 12v for a smart charger for external tx battery charging.
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