Hi. am using arduino uno r3 having the problem L indication LED is continuously blinking and i can not upload or dump program
please find the below error and reply
Arduino: 1.8.5 (Linux), Board: "Arduino/Genuino Uno"
Archiving built core (caching) in: /tmp/arduino_cache_480616/core/core_arduino_avr_uno_5ae566d2b74f299eedfb0fc6b9173d06.a
Sketch uses 928 bytes (2%) of program storage space. Maximum is 32256 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Maximum is 2048 bytes.
/snap/arduino-mhall119/5/hardware/tools/avr/bin/avrdude -C/snap/arduino-mhall119/5/hardware/tools/avr/etc/avrdude.conf -v -patmega328p -carduino -P/dev/ttyACM0 -b115200 -D -Uflash:w:/tmp/arduino_build_478206/Blink.ino.hex:i
avrdude: Version 6.3, compiled on Jan 17 2017 at 11:00:16
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "/snap/arduino-mhall119/5/hardware/tools/avr/etc/avrdude.conf"
User configuration file is "/home/raj/snap/arduino-mhall119/5/.avrduderc"
User configuration file does not exist or is not a regular file, skipping
Using Port : /dev/ttyACM0
Using Programmer : arduino
Overriding Baud Rate : 115200
avrdude: ser_open(): can't open device "/dev/ttyACM0": Permission denied
avrdude done. Thank you.
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.