Hello all,
I am a student trying to see if I can design a lower power version of the pro mini than what one can buy. This is for a bigger project of mine where I look into energy harvesting and if it can extend battery life for a low power application. I have done this schematic in KiCAD following the arduino schematic for the pro mini while tweaking a few things like using another voltage regulator and having no power LED since that is what I've seen people do to the base pro mini to get power consumption down.
This is the arduino schematic:
The application for this was like temp, humidity and such monitoring so I also added a BME680 and used this schematic design from Sparkfun:
There is also some pins for me to connect an e-paper display to display all the info, would used one from waveshare: here
This is the KiCAD schematic from me:
This is for the AtMega328p:
This is for the voltage regulator:
This is for the BME680:
This is for the FTDI breakout, battery and e-paper display:
This is the full schematic:
And then the 3D model, it's 4 layers so I could have a ground plane and a power plane:
I understand it's not quite pretty or space efficient but I wanted to hear opinions on its viability like if it would actually work or if I overlooked anything. I would appreciate any advice or suggestions for this. Also are the capacitors here supposed to be the load capacitance of the crystal oscillator? I'm using the HC49 which has load capacitance of 20pF.
Thank you for your time, really appreciate the help
I am a student trying to see if I can design a lower power version of the pro mini than what one can buy. This is for a bigger project of mine where I look into energy harvesting and if it can extend battery life for a low power application. I have done this schematic in KiCAD following the arduino schematic for the pro mini while tweaking a few things like using another voltage regulator and having no power LED since that is what I've seen people do to the base pro mini to get power consumption down.
This is the arduino schematic:
The application for this was like temp, humidity and such monitoring so I also added a BME680 and used this schematic design from Sparkfun:
There is also some pins for me to connect an e-paper display to display all the info, would used one from waveshare: here
This is the KiCAD schematic from me:
This is for the AtMega328p:
This is for the voltage regulator:
This is for the BME680:
This is for the FTDI breakout, battery and e-paper display:
This is the full schematic:
And then the 3D model, it's 4 layers so I could have a ground plane and a power plane:
I understand it's not quite pretty or space efficient but I wanted to hear opinions on its viability like if it would actually work or if I overlooked anything. I would appreciate any advice or suggestions for this. Also are the capacitors here supposed to be the load capacitance of the crystal oscillator? I'm using the HC49 which has load capacitance of 20pF.
Thank you for your time, really appreciate the help
