-- For **TMK converter Rev.1** use `make -f Makefile.rev1` instead.
-- To select keymap use `jis`, `spacefn` or your own in place of `plain`.
+For **TMK converter Rev.1** use `Makefile.rev1` instead.
+
+If your use DIY converter with ATMega32u4 board you can use `Makefile.32u4`, but note that progarmming with 'dfu' may not work for your converter.
+
+
+Build your own converter
+------------------------
+Use ATMega32u4 as controller and Makefile.32u4 to build firmware.
+
+1. Wire **Vcc** and **GND** properly.
+2. Connect **Clock** to `PD1` and **Data** to `PD0` line. (Compatible to Soarer's converter pin configuration)
+3. You need pull-up resistors on both signal lines. 1K-10K Ohm would be fine.
+
+You can configure controller and pin configurations in Makefile and config.h.