Digital Designs and Scientific Hardware - Open-Source Lab: How to Build Your Own Hardware and Reduce Research Costs - page 226

FIGURE 6.69 The electronic schematic for the pHduino datalogger.
You are encouraged to build on these open designs and improve the resolution of this in-
strument to compete with the most expensive and sophisticated commercial pH meters. The
pHduino was designed to be a simple, easy to understand, and easy to modify analytical tool
like the open-source spectrometers to be discussed in Section 6.6 . Like the open-source col-
orimeter, the pHduino could also be immediately improved to be a field instrument (bey-
ond a bench top!) by providing a case for it similar to the Geiger counter in the previous sec-
tion. Again, we are at the beginning and just scratching the surface of open-source scientiic
hardware. You should expect more sophisticated high-performance tools to be on the Internet
shortly—may be you can help accelerate their development?
6.5 Biology: OpenPCR, Open-Source Centrifuges and
More
OSH can also be used for biology, biological science, and bioengineering. In this section, we
will look at designs for an open-source polymerase chain reaction (PCR) machine, open-source
centrifuges, and many other biological research tools. The results of the equipment from the
designs are discussed similarly to the last section to provide data for conclusions about future
development of other open-source analytical tools discussed in Chapter 7 .