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diff --git a/converter/ps2_usb/README.vusb b/converter/ps2_usb/README.vusb
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+V-USB Support
+=============
+You can also use this converter on ATmega(168/328) with V-USB instead of Teensy.
+The converter on V-USB lacks some features for now: USB NKRO and System/Media control.
+
+To build a firmware use Makefile.vusb instead of Makefile.
+
+
+Circuit
+-------
+                +---+   +---------------+
+USB            GND  |   |   ATmega168   |
+===                 C3  |               |
+5V <-------+--------+---|Vcc,AVCC       |        PS/2
+           R1           |               |        ====
+D- <----+--+-----R2-----|INT1        RXD|------->DATA
+D+ <----|---+----R3-----|INT0        XCK|------->CLOCK
+        Z1  Z2          |               |      ->5V
+GND<----+---+--+--+-----|GND            |      ->GND
+               |  |     |               |
+               |  C2-+--|XTAL1          |
+               |     X1 |               |
+               +--C3-+--|XTAL2          |
+                        +---------------+
+R1:     1.5K Ohm
+R2,R3:  68 Ohm
+Z1,Z2:  Zenner 3.6V
+C1,C2:  22pF
+C3:     0.1uF
+X1:     Crystal 20MHz(16MHz/12MHz)
+
+
+This is my V-USB converter on breadboard.
+[IMG]http://i.imgur.com/8jJCZl.jpg[/IMG]
+
+
+EOF