M.2-SHELL-A

An introduction
 
to use: Use it with the open source m.2 interface core board (core board project link: https://oshwhub.com/alitas/ESP32-WROOM-32-M.2). I use the one in the picture below. This method is for reference only. Connector model: NGFF 67P, 3.2H, M-KEY 4+5, fixing screw model: 3*10 M3; 2 m3 type nuts, one in the middle and one at the bottom. You need to control both Board spacing (tilt too high or too low), otherwise it may result in poor contact between the board and the connector.
  2. Soldering tips: Pay attention to check for pin adhesion. This has been taken into account in the design. There is a free space between adjacent valid pins. It is also recommended to use rosin and other fluxes, which are very easy to use and can basically guarantee that there will be no problems.
  3. Test: The gap between the two boards is very small, but it has been tested that it does not affect the welding of the power strip and does not hit the core board. The IO corresponding to the silk screen is accurate. I have tested the three IO ports and there is no problem. If the pins are useless In this case, the priority is to check whether the poor contact is caused by the installation angle problem. The picture below shows the light bar welded during the test.