Devlog #7 Adding holes and mounting holes, battery, pcb changes and adding a hatch and expanding the case

Making holes for micro sd card and micro usb connector:

I have created holes for the micro sd card and micro usb cable.
The micro usb cable is there for when i need to flash code, but dont want to unsolder everything and for when not using battery to test it.
I will mount the micro sd card module with two screws to the case.

Battery:

I always had battery planned in my circuit, but for now i didnt know how big or wich capacity. I chose li-pol. because they fit my size requirements and are small, effiecent. I tried many different sizes and capacities, until i found the one that barely fits in the design (450mah). It should be able to runthe mp3 player for few hours, so that is okay.

PCB changes:

• moved some things to the opposite layers
• moved some things somewhere else, so that it fits in the case
• changed the classic dupont pint for the micro sd card, for a smd spi connector cable, because that is what the micro sd card reader also uses so it uses less space

Case design change:

I had a green pcb still visible with pins and condensators, wich doesnt look good, and can be dangerous. So i covered that part with a hatch and left only the buttons visible.

Things left:

• create bom
• polish the design and the pcb
• check the code for errors
• find the components online
• submit my project