In this instructable I will be showing you how to adapt the chronographing method to give approximate rate of fire of an automatic airsoft gun.
You will need:
1. An airsoft gun
2. A computer with audio capture card ( one with a microphone input to be precise)*
3. A microphone
4. An audio capture program ( Audacity is open source, free and worked well for this application. It can be downloaded here http://audacity.sourceforge.net/)
5. A target that will cause a sound when struck and an appropriate backstop
6. As always with projectiles, A SAFE AREA TO TEST THE DEVICE AND AN APPROPRIATE BACKSTOP. ACCIDENTS HAPPEN AND SO PRECAUTIONS SHOULD ALWAYS BE TAKEN TO PREVENT INJURY.
- A device that captures audio with a high enough bit rate, preferably in .wav format could be substituted for the computer, if you can't put the computer in place, or don't have a capture card. I haven't tried this but I don't see why it couldn't work. I know there are .mp3 players out there with microphones and recording software, and usb ports are on all, if not most computers these days.
Ready to go? On to the set up