Watersports (To kill a laserbird, 3 of X)

After you’ve broken two laser tubes (one chinese, one high quality) because of lack of refrigeration, it’s about time you hodor honor the promise of making that damn waterflow sensor you said you were going to make in the first place the first time you broke the laser.

Everything starts with a drawing:

Deadpool-Trailer-Screengrab-Crayon-Art-Drawing

Nice try, but no, that’s not even a (blood) flow detector.

IMG_20160515_000859

Looks like a plan, doesn’t it? XD

Let’s build something

IMG_20151209_180456

Cut and drill the acrylic as needed:

IMG_20151209_191722

Mill some slots for the water to run past the buoy:

IMG_20151209_192803

Add magnets, of course!

IMG_20151209_194942~2
Acrylic rod drilled and sealed with epoxy.

Polish:

IMG_20151209_194942

Glue nicely to prevent leaks:

IMG_20151209_195652

Mill a slot, glue some reed sensors (since it’s not a tachometer, you don’t really need hall effect sensors), add connector of your chosing. I used a DB9 because I want all the connectors for external devices to be all different, so I can’t mistakenly connect two.

IMG_20151217_204650

Succes!

How it works:

The magnet buoy resides at the short piece, acting as a loose plug. Once water starts flowing, it will push it upwards, however, if there is not enough flow, the venturi effect will prevent the buoy to get past the slot interface and up to the top of the sensor, signaling for a decreased flow, probably because of clogged filter. If there is nothing wrong with the setup, the water will swiftly push the magnet carrier up to the top of the assembly, activating the laser enable and allowing you to lase whatever you want.

So, the laser is safe-ish, for now. ^^

 

Advertisements

One response to “Watersports (To kill a laserbird, 3 of X)

  1. Pingback: Milling a Flow Sensor to Safeguard a Laser Tube | Hackaday

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s