diff --git a/Readme.md b/Readme.md
index 64d0a68..9886e62 100644
--- a/Readme.md
+++ b/Readme.md
@@ -86,6 +86,22 @@ See *Project/USB-Serial* for a fully usable USB-Serial bridge and how to use the
 In the CDC.h you can also see the new Control Line functions for advanced users.
 Keep in mind that the USB_ENDPOINTs for the u2 Series are set to 16 bytes, so the Serial buffer is also smaller (normally 64b).
 
+**If you don't want to use the USB-Core** you can also choose under *Tools/USB Core* "No USB functions" to get rid of the USB stuff
+and save the ram for other stuff if you don't need it. You also don't need the HID Project essentially if you don't want to use the USB functions.
+Due to a bad Leonardo/Micro bootloader you need to add an add an ISR into every sketch as workaround.
+**This is not needed for HoodLoader2 devices**, since the bootloader does a true watchdog reset on reprogramming and not a simple application jump
+(the usb clock is then still on and breaks any delay functions).
+Checkout the 'Leonardo_Micro_NoUSB_Blink' example.
+
+```cpp
+// workaround for undefined USBCON has to be placed in every sketch
+// otherwise the timings wont work correctly
+ISR(USB_GEN_vect)
+{
+  UDINT = 0;
+}
+```
+
 ### HoodLoader1 (legacy, new stuff coming soon)
 
 **Try the HoodLoader1 example. It provides the basic Serial protocol API to send HID reports. You have to copy this to every sketch again.**
@@ -131,6 +147,10 @@ Install HoodLoader2 and flash the hex file. If it works please leave me some inf
 Troubleshoot
 ============
 
+**Any random weird problem** is mostly solved by a pc reboot or a port switching. Try another (USB2.0) port if you have any problems with your device.
+You might also try it on another pc to see if your OS mixes up drivers. Once I had a problem with my USB-Hub, so ensure to connect it directly.
+You could also try a different/shorter USB cable.
+
 **Switching the HID-Core** might confuse the OS since the USB device changes completely from one second to the other.
 Therefore go to Printers and Devices on Windows and select remove. Reconnect your Arduino and maybe remove it again if its not working properly.
 Alternatively you can also restart your PC or use another USB PID (in the boards.txt) to see if its a Windows problem or not.
@@ -193,7 +213,6 @@ Generalize HID key definitions via HIDTables for example?
 update Burning via ISP (advanced)
 Test with Android phone (HL1)
 "Emulate" HL1 protocol
-test no usb function with leonardo (usb workaround?)
 remove dev HL2 link
 ```
 
diff --git a/examples/Projects/Leonardo_Micro_NoUSB_Blink/Leonardo_Micro_NoUSB_Blink.ino b/examples/Projects/Leonardo_Micro_NoUSB_Blink/Leonardo_Micro_NoUSB_Blink.ino
new file mode 100644
index 0000000..8309b26
--- /dev/null
+++ b/examples/Projects/Leonardo_Micro_NoUSB_Blink/Leonardo_Micro_NoUSB_Blink.ino
@@ -0,0 +1,31 @@
+/*
+ Copyright (c) 2014 NicoHood
+ See the readme for credit to other people.
+
+ Leonardo_Micro_NoUSB_Blink
+ 
+ Blinks Led and shows what workaround is needed to fix the timing.
+ This is not needed for HoodLoader2 devices any more.
+*/
+
+
+// workaround for undefined USBCON has to be placed in every sketch
+// otherwise the timings wont work correctly
+ISR(USB_GEN_vect)
+{
+  UDINT = 0;
+}
+
+// the setup function runs once when you press reset or power the board
+void setup() {
+  // initialize digital pin 13 as an output.
+  pinMode(13, OUTPUT);
+}
+
+// the loop function runs over and over again forever
+void loop() {
+  digitalWrite(13, HIGH);   // turn the LED on (HIGH is the voltage level)
+  delay(1000);              // wait for a second
+  digitalWrite(13, LOW);    // turn the LED off by making the voltage LOW
+  delay(1000);              // wait for a second
+}