DIY Paintball Gun Chronograph
We have seen DIY bullet speed measuring systems before, this DIY Paintball Gun Chronograph by Instructables user KLASH69 has been well documented and includes schematics, PCB layouts and code so you can get a jump on building your own. “The operation of this chronograph is rather simple, there are two IR transmitters and two IR Detectors, each transmitter/detector pair is placed exactly four inches apart. When an object breaks the