| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| mathew | "I ran a test in our kit packing area and found 26ppb of formaldehyde. while running the test, a Rotameter from VWR arrived in the mail. I hooked ..." | Read more » | over 9 years ago | |||
| danbeavers | "@davidmack I don't know how much vacuum a 5lpm pump will produce but it needs to generate "below 7psia" to get sonic or choked flow. An aquarium ..." | Read more » | over 9 years ago | |||
| mathew | "I broke the tip off the tube with a pair of pliers. I do need a proper tip breaker-- my method left a good mess. " | Read more » | over 9 years ago | |||
| mathew | "Can i get a 250ml pipette? My choice of graduated cylinder volume was based on a desire to make the time period I measured long enough that my reac..." | Read more » | over 9 years ago | |||
| mathew | "the pump's output seems fairly consistent without a warm-up. I wanted to see if the setup retained its configuration from yesterday, so I ran thre..." | Read more » | over 9 years ago | |||
| DavidMack | "Looks like a nice setup! For bubbles, the cheap ready made option would be any liquid bubble--the kid's toy to blow bubbles. @danbeavers I think ..." | Read more » | over 9 years ago | |||
| danbeavers | "Looks like you had problems breaking the tip of the tube. What process did you use? I am really curious to find out how much flow variation there..." | Read more » | over 9 years ago | |||
| blurb | "Hi. I needed a similar valve (albeit for higher pressures) recently, Made one much like yours, except I used a swagelok 40 series ball valve and a ..." | Read more » | almost 10 years ago | |||
| WitLegow | "fyi, I just noticed that the local public library in Houston has a 3D printer that is available for use by anyone, they only charge by the gram for..." | Read more » | almost 10 years ago | |||
| arguin | "Amazing! " | Read more » | almost 10 years ago | |||
| JSummers | "Hi, Since this uses a stepper motor (12 volts), I think you will need the motor driver. The Arduino will do the job of the LaunchPad that we used..." | Read more » | almost 11 years ago | |||
| murfrox | "An arduino would be able to be used in place of both the development board and the motor driver, right? " | Read more » | almost 11 years ago | |||
| mathew | "I'm glad you skipped the laser cutters etc. and went straight to the wood shop. far more accessible. My experiences with MDF are similar. It love..." | Read more » | about 11 years ago | |||
| JSummers | "I have never been very happy with my results when machining mdf. It does not take fasteners well (especially screws) and I recall having trouble w..." | Read more » | about 11 years ago | |||
| jbreen | "What about using MDF? Wouldn't that get rid of the issues with wood grain? " | Read more » | about 11 years ago |