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Voltage limit on newer version?

Hi,

for quite a while now we've been successfully using 5v io-li batteries with the first version of the AM. When we try them with the newer devices (from round 6) they don't even turn on (no led flashes at all). Is this change due to a hardware modification or is it has to do with the firmware, and it's therefore amendable without adding or changing any hardware?

Many thanks!

2 comments

2 Comments

Xavier Puig-Montserrat

Oct 04, 2019

Hi Alex,

Thanks for the quick answer!

We solder the batteries onto the terminals. After following your instructions I've noticed that the only devices that don't work fine are those we welded power cables to yesterday.

Please apologize for rushing the question, I should have double checked that before.

Thanks,

Alex Rogers

Oct 04, 2019

Hi,

Nothing should have changed in this respect. Are you soldering the batteries onto the original battery terminals or are you powering the device through the USB port?

If the latter, the latest firmware has a 'Enable low-battery cutoff' option which should be unticked so that the AudioMoth carries on making recordings even though it sees a 0V battery.

If you take out the AA batteries, put the switch to CUSTOM, and then plug the power supply into the USB socket, the AudioMoth should immediately start flashing both LED to indicate that you are trying to make a scheduled recording but the time has not been set.

Does this work from a normal USB cable powered from a laptop? If so, the AudioMoth is working fine. If it doesn't work with a USB Li-Ion power supply, it may be that the power supply is not switching on as it sees the load as being too small. A couple of people have reported that their Li-Ion phone chargers cut off due to this reason.

Alex