hardware

3d printed Straw Pipetter

Christopher Pendlebury has created a simple pipetter suitable for dispensing liquid in the 200μL to 1000μL range.

Instructions

1. Print StrawPipette.stl
2. If necessary, clean up hole so straw slides in easily. The straw should stay in snugly, but shouldn’t crush the straw.
3. If required, sterilise some drinking straws.
4. Insert straw and use pipette:
i. Insert into liquid, cover top of straw with thumb.
ii. hold thumb on straw while transferring liquid.
iii. release thumb to dispense liquid.
5. Change straw when you would change a micropipette tip.

Print your own via Thingiverse

 

GoGoFuge: an open source microcentrifuge


Keegan Cooke, the developer of the Mudd Watt, has adapted Cathals dremelfuge into a pretty nice looking tabletop microcentrifuge.

Intro to Spectral Workbench

 

PLOTS continues to impress with the quality and accessibility of their work. The software suite they just released to accompany their $30 spectrometer is much nicer than anything i’ve seen packaged with “research” grade specs.

PLOTS Spectral Workbench is the client software for the video spectrometer, and can be found here:

https://github.com/jywarren/spectral-workbench

It is in alpha, though with some configuration it should run on Linux, Mac, or Windows. It is free and open source (GPLv3) and requires the open-sourceProcessing environment. Click the “zip” download to get a copy.

To learn how to use the software, see:

Spectral Workbench usage »

It uploads spectra to the open source spectral database at:

Spectral WorkBench (may be renamed)

The website is a place to archive, share, and interpret spectral data. By uploading spectra to the website, you agree to release the data under a Creative Commons Zero license (the equivalent of a Public Domain dedication), which allows for unrestricted use by anybody.

How to add a double decker to your shaker

Joseph Elsbernd, of the Cheap Ass Science Blog brings us a rather simple but ingenious way to get double the area out of your shaker/rocker using nothing but a bit of pvc tubing and your choice of decking material.

Via Cheap Ass Science

Swiss Army Tube Block

Kyle Lawson has designed a versatile tube holder capable of being printed with a 3D printer.

In biological sciences, we use 6 different sizes of tubes for samples. This two part block, is the only block I know of that can accept all 6 types of tubes. I designed it so that I could split into 2 halves to be used as 2 separate racks. I’m really excited about scientists and hobbyists being able to produce useful equipment at home… provided they have access to a 3D printer.

Tube sizes that it holds include: 0.2mL, 0.5mL, 1.5/2mL, 5.0mL, 15mL, 50mL

If you are interested in printing the tube block, Kyle has made the design available on thingiverse(link below) under a CC BY-NC license

Swiss Army Tube Block of Science V.1 by IdFarmer(aka Kyle Lawson)