Dear group,
I am currently developing a wrist-worn based device using the PIC18F24J50.
The problem I am having is with the design of a battery circuit and specifying the correct Battery. It requires;
-Charging from USB (5v vbus)
-To last up to one month
The wrist device samples an accelerometer at 10Hz when active. If no activity (acceleration) has been detected for 25 seconds the PIC is put into deep sleep mode.
Can anyone recommend a suitable Battery and charging circuit from USB? The PIC runs on 3.3v
How can I minimise battery usage?
Where can I source a suitable Battery? Does anyone know any good suppliers?
Really appreciate any help here.
Thanks