Quote:
Originally Posted by BrianG
He used a BEC and a low-voltage cutoff/alarm, but that's getting a bit pricey just for a radio battery solution IMO. Not to mention what would happen if the BEC went bad and outputted the full 2s (or higher) battery voltage. Not sure how sensitive these radios are to overvoltage, but 8.4v (2s @ 4.2v/cell) is quite a bit higher than 6v...40% higher to be exact.
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Here we go again
. The cost isn't that much - $10 cheap switching BEC, maybe $5 for the components to make your own dead-bug style audible low voltage alarm (schematics are at RC Groups).
The chance of the BEC failing in the TX is MUCH less than if used to power a RX at a higher input voltage. So, you are much more likely to have a fried RX than TX due to switching BEC failure.
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