Hi,
I can't believe, some mouths ago i tested my system with atmega328 and Sim900A with a MT3608 Step Up.
I got 3.7 to 5v and all went right with different battery.
Today i've been tested the same system but i find that the MT3608 can't supply the right current(I think) to the Sim900a that go down on start.
I tried that with different battery with the same result.
I know that:
1) Sim900A need to 2A peak to start
2) If i use a usb power supply 1.5A system start without problem and the sim9000A starts.
Sorry for my english ... too much beer and i need to sleep.
Thank's
I can't believe, some mouths ago i tested my system with atmega328 and Sim900A with a MT3608 Step Up.
I got 3.7 to 5v and all went right with different battery.
Today i've been tested the same system but i find that the MT3608 can't supply the right current(I think) to the Sim900a that go down on start.
I tried that with different battery with the same result.
I know that:
1) Sim900A need to 2A peak to start
2) If i use a usb power supply 1.5A system start without problem and the sim9000A starts.
Sorry for my english ... too much beer and i need to sleep.
Thank's