I am looking at options to power my TX2 in a mobile way. I have read both documents:
I note they recommend li+ batteries. Is there a technical reason for this? I ask because I tried to power the board from a 15V dry cell battery pack (10 x 1.5 volt AA’s) and separately from a cordless drill pack (14,4V and very capable in terms of current output).
Testing with a meter, the dry cell pack shows no load 15.4V and the drill pack shows 16.4V no load, both well within the stipulated 5.5V -19.6V limits.
It has been suggested to me by a well known online TX2 developer that the TX2 will not turn on in the presence of such a voltage dip, and that many users have tried using a capacitor to prevent it. He uses a lipo battery to power his TX2 projects.
I have not had any success with a total of 5000 uF added capacitors in parallel across the battery terminals, and allowing the caps to charge before attempting to turn on (charge confirmed by measuring across cap terminals with meter).
The board works fine with the power brick (I tested this just now) so there is no fault. I have ordered a 3S 11.1V lipo pack in the hope this will work. I see that there is zero drop from the mains power brick when powering on (measured using the record function on my meter as well as oscilloscope), so do li+ batteries just have zero power drop?