DIY laboratory shaker

Jordan Miller uploaded his open source orbital shaker project to Thingiverse.

This is an open-source orbital shaker for mammalian cell and tissue culture and for bench-top science. The orbital shaker fits inside a standard 37 ºC/5% CO2 cell incubator and puts out no heat so you can load up the incubator full of these things. We have used them for 2 weeks now and the design is very simple, inexpensive, and scaleable. Our cells are growing happily in these shakers.

Orbital shakers are typically ~$1,500 and even more expensive if you need one that is designed for a cell incubator so that it will not put out any heat (incubators only have heating and not cooling functions, so if equipment puts out too much heat it will kill all the cells in the incubator).

I used an arduino microcontroller, Pololu stepper motor controller, and an inexpensive stepper motor. A DC motor could have been used but it is very difficult to control the rotational speed with high accuracy since the DC motor rotation speed varies based on load. Instead I used a $10 stepper motor and a pololu stepper motor controller at 1/16th stepping.

6 thoughts on “DIY laboratory shaker

  1. Anyone else get the urge to build one of these and toss a big flood lamp on top and fill the plastic containers with ferric chloride? You could save tons of etchant in comparison to a bubble tank.

  2. Why are you shaking mammalian monolayer cultures in the first place? They grow just fine sitting still. If your intention is to grow these cells in suspension, you’d be better off using a suspension bottle with a simple rotary impeller blade, driven by a magnetic stir plate.

    Bacterial broths need agitation, but in that case you only need a big rotating wheel tilted at a 45-degree angle, with clamps for your favorite flask or tube sizes. In any case, an Arduino seems unnecessary for anything besides blog cred. How about just a servo hacked for continuous rotation?

  3. One could consider programming the motors to turn in opposite directions to cancel out shaking of the support structure. Might be essential for scaled-up versions.

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My interests include writing, electronics, RPGs, scifi, hackers & hackerspaces, 3D printing, building sets & toys. @johnbaichtal

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