MontassarIn the previous update, I posted a new schematic of a custom board for this project based on the STM32F407VG ( obviously ) . Soon after I decided to edit go over it again and remove some parts which I thought I can replace the regulator & the usb port and replace it with a 2 pin header that will later on connect to one of these cheap/small modules for voltage regulation and battery control.
3.3V linear voltage regulator.
LiPo battery charging module from sparkfun.
I had 2 main reasons behind this decision : First is to reduce the work necessary to get this up and working later on & simplify the PCB design process as much as possible. The second is having these modules laying under the main board and reduce it height & width.
The Gerber files will be soon submitted to OSHPARK if no one points something odd on the schematic.
Currently in work:
I'm currently working on the website for this project. It's gonna be a place where I share all the resources behind this project including schematic files, source code.
Discussions
Become a Hackaday.io Member
Create an account to leave a comment. Already have an account? Log In.
AMS1117: Quiescent Current: 5mA (typ) 11mA (max).
There are LDO out there that consumes a lot less current. Even a Buck converter like this consume 1/100X quiescent current.
http://www.skyworksinc.com/Product/1328/AAT2120
Are you sure? yes | no
Indeed , however I was not really concerned about the power consumption at this point so I threw in the AMS117-based module as an example. Thank you for the reply. By the way I see you used an "MCP1700T-3302E/TT" in one of your similar projects.
Are you sure? yes | no
Still though the voltage regulator wins. It's the standard within something like this. As for the power consumption, i believe the software will be the major player in that. Also using a BLE module instead of the HC05 will save me a couple of mA.
Are you sure? yes | no
3.3V linear voltage regulator. <-- a buck converter will comsume less power, resulting in longer battery life ;)
Are you sure? yes | no