Not as yet mate, will get them later today.How long do you think they will work for.Not for long. If all of them are flashing LEDs, they will each need their own path and resistor. If each pulls 20ma, then 30 X 0.02 then the total current is 0.6A.
You can use none blinking diodes in series to drastically reduce that current, but 9V batteries just don't have much juice in them.
Do you have a datasheet of the LED you are thinking of using?
Even "D" cells won't last long, but maybe long enough. Radio Shack has some pretty good battery holders at reasonable prices.
by Aaron Carman
by Jake Hertz
by Aaron Carman