diff --git a/doc/app_notes/sensing.png b/doc/app_notes/sensing.png new file mode 100644 index 0000000..9027c93 Binary files /dev/null and b/doc/app_notes/sensing.png differ diff --git a/doc/bb-clk.jpg b/doc/bb-clk.jpg new file mode 100644 index 0000000..0141de7 Binary files /dev/null and b/doc/bb-clk.jpg differ