Open-Source Microcontrollers for Science - Open-Source Lab: How to Build Your Own Hardware and Reduce Research Costs - page 80

FIGURE 4.25 Troubleshooting pin connection for keypad.

FIGURE 4.26 Color indicator on dehumidifier.

4.5.9 Open-source technological evolution for the Bear

Chamber
If you build the Polar Bear Open-source Environmental Chamber following the instructions
above, it will work and perform to the specifications. This, however, may not be adequate for
your environmental chamber needs. Perhaps you need a larger chamber or one that can cool
to −10 °C. Similarly, depending upon your technical expertise, you may have many ideas for
ways to improve the design, function, code, etc. of the Bear Chamber. Excellent! Please do
it. This piece of scientific hardware is open source [ 4 ] , which means that you can use all the