NyBorad V0_2 WriteInstict.ino was uploaded as V0_1 (my mystake) but everything passed well - Instincts are loaded - MPU is calibrated - Joints are callibrated (bcs the wiring schema is for V0_1 was used) and saved I took out batteries and left my cat for the night. On a next day I wrote done Nybble.ino (still as V0_1) but IR didnt work So I again took out batteries and left my cat for the night at a rest postion. On a 3rd day I put a full charged non-protected batteries and power on my cat - A non-stop buzz come from the board after power-on - The blue led and the green led are constantly on - if FTDI is pluged (yes, GND to GND) into the board before power on - the PWD and REN leds are constantly on I see /dev/ttyUSB0 under my Ubuntu, port speed 57600 but cant upload any sketch nor any bootloader now avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x00 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x00 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x00 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x00 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x00 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x00 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x00 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x00 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x00