Plugs into an ST-Link V2 to convert the 100mil 20-pin header into a 100mil and 50mil 10-pin headers with standard SWD pinout. A reset switch and some test loops are also provided.

Because of the height of the header on the ST-Link relative to the housing, I recommend using a piece of ~1/16" or 2mm thick craft foam as a spacer between the bottom of the board and the ST-Link. It can be cut to eh outline of this board, with a rectangle cutout for the header on the bottom, and glued or double-stick-taped to the bottom of the PCB.

 Comment             Pattern     Quantity  Components
------------------------------------------------------------------------------
 100                 RESC1608X85L35N    1    R1                           100O 100mW 1% 100 PPM/°C 0603 Thick Film Resistor
 430 182 095 816     430182080816     1    SW1                            SMT Tact Switch
 5015                5015             5    TP1, TP2, TP3, TP4, TP5      SMT Micro Miniature test point
 966210              966210           2    J1, J2                       2x5-pin 100mil SMT through-board female headers
 Value               20021521-00010T1LF    1    J3                      50mil 10-pin SMT box header
 Value               N2510-6V0C-RB-WD    1    J4                        100mil 10-pin SMT box header