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Abstract
An open-source 3-D printable laboratory sample rotator mixer is developed here in two variants that allow users to opt for the level of functionality, cost saving and associated complexity needed in their laboratories. First, a laboratory sample rotator is designed and demonstrated that can be used for tumbling as well as gentle mixing of samples in a variety of tube sizes by mixing them horizontally, vertically, or any position in between. Changing the mixing angle is fast and convenient and requires no tools. This device is battery powered and can be easily transported to operate in various locations in a lab including desktops, benches, clean hoods, chemical hoods, cold rooms, glove boxes, incubators or biological hoods. Second, an on-board Arduino-based microcontroller is incorporated that adds the functionality of a laboratory sample shaker. These devices can be customized both mechanically and functionally as the user can simply select the operation mode on the switch or alter the code to perform custom experiments. The open source laboratory sample rotator mixer can be built by non-specialists for under US$30 and adding shaking functionality can be done for under $20 more. Thus, these open source devices are technically superior to the proprietary commercial equipment available on the market while saving over 90% of the costs.
Highlights
The success of free and open source development of software is well established and this method of development outside of purely software has grown most rapidly in electronics such as with the Arduino microcontroller [1]
The opensource Arduino is already established for use in low-cost high-quality scientific and engineering equipment [2,3,4,5,6,7] including: an ambient sensor cloud system using OpenFS for high-throughput phenotyping [8], electrophoresis [9], imaging [10,11], mass spectrometry [12,13], mechatronics [14], microscopy [15,16], oceanographic research [17], optics [5,6,18], sensors for open hardware [19], including for colorimetry [20], in-vivo optimal imaging [21], nephelometry [22], pressure monitoring [23], smart plugs [24], soil moisture [25], Skinner boxes [26], vision research [27] and developing a wireless sensor node to monitor poultry farms [28]
One of the most important control projects for scientists is the use of the Arduino for the open source 3-D printing community around the self-replicating rapid protoyper (RepRap) 3-D printer family [34,35,36,37,38]
Summary
The success of free and open source development of software is well established and this method of development outside of purely software has grown most rapidly in electronics such as with the Arduino microcontroller [1]. One of the most important control projects for scientists is the use of the Arduino for the open source 3-D printing community around the self-replicating rapid protoyper (RepRap) 3-D printer family [34,35,36,37,38]. The combination of free and open software and hardware design can be combined with RepRap 3-D printing for distributed digital fabrication of.
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