Making a Homemade Chronograph (two different types explained!)

In this video I show you my homemade chronographs i've used to measure the velocity of my spudguns. Both have good and bad points, I prefer the Phototransistor one personally as it is easier for me to setup. Both work great though. Any questions, just ask. Much thanks to Jimmy101 and Technician1002 of Spudfiles.

Category:

Howto & Style

Tags:

• spudgun
• spud
• gun
• launcher
• potato
• bazooka
• pneumatic
• combustion
• hybrid
• Kartoffel
• pneumatisch
• air
• Kanone
• pneumatique
• patator
• PAL
• Patators
• Air
• Comprimé
• PAC
• damage
• golfball
• golf
• ball
• nerf
• airsoft
• pressure
• video
• how
• to
• how-to
• make
• simple
• basic
• homemade
• home
• made
• powerful
• power
• high
• qev
• piston
• valve
• sprinkler
• hammer
• ignitor
• propane
• mapp
• hair
• spray
• chronograph
• phototransistor
• audio
• computer
• laptop
• audacity

[szerszen2007]

What s the name of this music?

[MrCrowley45]

@szerszen2007 Buckethead - "Soothsayer"

[hl2forever]

nice work, ill have to try the phototransistor one, whats the name of the music ?

[MrCrowley45]

@hl2forever if you have any problems when making the PT chrony, just send me a message or something and ill be happy to help.

[SeahunterDK]

@MrCrowley45

I was wondering how close you have to be to the phototransistors to get a measurement?

Lets say you take a shotgun or rifle and you fire it from a distance of 2 meter, would it be possible to read something like that? Those projectiles/slugs are not very big and if they have to pass by close to the phototransistors it would be difficult to do´, or not?

[MrCrowley45]

@SeahunterDK

Not sure. According to the guy who made the tutorial on making these (known as Jimmy101 on the Spudfiles forum), it should be able to pick up airsoft BBs (6mm) travelling supersonic, but probably not much faster than that. The PTs are only a few mm big, might be too hard to shoot over both from a distance of 2m reliably.

You could enhance the effect on the phototransisters though, like putting them inside a tube and making you shoot through the tube.

[anielsen100]

thanks for the video. now i know my modified air rifle shoots 710fps with 14.3gr ammo pretty good for a Canadian gun eh :)

[AverageJoe115]

Haha! "And something to shoot at. TV" haha, nice!

[spinafire]

Awesome. Audacity is more useful than I thought!

[MegaGunDog]

@CompIexmetal

And you're just trying to be smart by looking at this video and commenting.

Shut up you asshole, he was trying to help.

Thanks MrCrowley45.

[CompIexmetal]

your just trying to make your self look smart get a real life dude