I couldn't find a panel-mounting MicroSD card reader anywhere, so I decided to design one!

Many microcontroller projects use MicroSD cards but the reader is normally mounted onto the board, making it difficult to access if the board is mounted in an enclosure. Separate modules are available but none have a convenient mounting system to allow permanent installation in a project enclosure.

This tiny breakout adapter board will allow you to mount a MicroSD card reader into the face panel of your enclosure, allowing easy access to insert and remove the card. Connections are broken out to a pin header of your choice (horizontal/vertical, top or bottom) or could be hardwired. The option to mount the pins on the underside allows the module to be integrated with a standard breadboard (2.54mm spacing). When connected, the reader uses the SPI protocol to communicate with the microcontroller.

The board is 40mmx20mm and is based on a standard design:

https://circuitdigest.com/fullimage?i=circuitdiagram_mic/Micro-SD-Card-Module-Schematic.png

It uses a LD117 regulator to ensure the required 3.3V.

The model of MicroSD card slot used here is a surface-mount Molex 104031-0811:

https://sigma.octopart.com/16323961/technical_drawing/Molex-1040310811.pdf

All components also are SMD except the mounting brackets and pin header. The solder pads for the SMD resistors and capacitors are enlarged to allow hand-soldering. The board is one-sided with no vias, with a ground pour on both sides which is also grounded to the enclosure via the brackets.

The mounting brackets used are 614 6-32 from Keystone:

https://www.keyelco.com/userAssets/file/M65p118.pdf.

The mounting holes required in the face panel are 30mm apart and 3.5mm diameter. You will also need a slot in the faceplate for the MicroSD card.