Airsoft bb counter help..

[hawktalk]

what i would like to do is make a device to count down how many bbs i have shot from a set number like a 130rd mid cap mag say. anybody have any ideas or diagrams to help. this unit preferably counter unit will have to be at end of muzzle and the display near the mag well.

[dewey-1]

You can read of this for ideas:

http://www.airsoftforum.com/board/Shot- ... p=18059608

[hawktalk]

i think if i knew a bit about all this programming etc it would be easy but no diagrams and there was a busted link which could have been a diagram
im really looking for a easy to follow diagram. i saw one on YouTube which uses infrared emitter and a receiver and whenever the gab was iterupted by pellet then it would read up on display but the guy is selling one for $50 and gives no info other than it uses IR