USB battery cable / bracket thingy
John - Is the circuitry voltage protected? I'm assuming yes, since I believe the standard usb voltage is larger then 3 volts.
If so, how about a cable or clip on device that would connect a standard 9volt battery direct to the mini USB slot?. Cable would work, but a holder that a 9volt battery is inserted into, with a mini male plug would work also.
Regards - Don
I'm looking into a rechargeable internal battery myself, I think that's the better way to go.
Good comment. Probably the staff could answer. I was looking at the simplicity of the 9v connector setup and making a case for it, maybe with some sort of step down circuitry built in. For a long term (one month+) in place alarm.
I've noticed that battery life is really effected when experimenting, moving it around, etc., vs just letting it sit with one trigger.
Regards - Don
The best solution is to run another connector of some sort, and have 2 external cells connected to the battery terminals. You get all the benefits of the extra power reserves of AA, C or D cells, plus battery voltage reporting, and no issues with going over or under voltage. It's also by far the most efficient method. AA's are highest power per $ value, and they're approx 3x the capacity of AAA's
However I'm still going down the rechargeable path. Initial tests have shown it should work perfectly. With the exception of the low battery warning point.
Anyone wishing to follow my experiments on a rechargeable battery for TWINE, can follow it here...