There are three or four areas that require monitoring and /or adjustment.
- The temperature within the integrating sphere
- The value of the light dependant resistor to monitor illumination levels
- Adjustment of the series resistor that controls the LED generating the illumination
- There will also be some sort of a visual ON indicator, which may be the transparent plastic cylinder on the right of the image. Safety is paramount and nobody wants to put their paw into a running integrating sphere.
This is some more (very slow) progress on the instrumentation pod, shown below. The rectangular recess in the middle is for a thermometer. This is required to access the performance of the CMOS sensor at various temperatures. We expect a 7 degree Celsius temperature change above ambient as the web cam warms up. This should lead to increased noise levels. Temperature effects are a critical component of true random number generators as the generated entropy will change, thus having a possible detrimental effect on the output. We have a cunning yet simple plan as to how to mitigate this effect.