LED flash grenade?
I am trying to make an LED flash grenade that I can use for airsoft/paintball. Basically I want it to countdown (from around 6-9 seconds just long enough to push the button and toss it into a room) and when it reaches 0 it would turn on multiple LED's (in a 360 degree pattern) but only for a brief period. (just long enough to temporarily blind someone.) I am pretty new to electronic circuits. I think I would use a 555 timer but not sure. What would be the easiest way to do this? Thanks in advance for the help.