Team:Aachen/OD/F device


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OD/F device

Measuring Optical Density (OD) is a central element in microbiological work and synthetic biology in general. Often the qeustion is, how many cells are in a suspension. The OD can give you a hint.

Commercial OD meters cost several hundred dollars (OD meter), and can limit the spread of synthetic biology. Especially for BioHack-Spaces, DIY laboratories and schools we wanted to develop an alternative.

With our OD/F device we want to enable many to people for good, precise and cheap science.

Especially for the Interlab Study also fluorescence has been of importance. Here the correlation between OD and fluorescence should be measured. Since the taks of measuring OD and fluorescence are often performed at the same time, we want to present a device that can measure both with easy changes. Finally we can tell you, how much fluorescence there is per cells.

OD device

F device

Getting your Device

Table 1: Number of pieces, components and costs for building your own OD/F device

number of pieces components costs [$] order e.g. from
1arduino UNO R312.66
2light to frequency sensor TSL 235R5.90
1display 2x16 l2C18.97
1filter slide5.20
2small breadboards3.00
1power supply5.00
1 case20.24
-odds and ends like header sockt/pins2.52-

Building your own OD/F device