Latest compact board is back from OshPark (www.oshpark.com) and testing is complete. Using the base Adafruit transimpedence amp design we were able to come up with a simple formula for convert the raw ADC values into a UVI. We’re debating whether or not it’s worth it to come up with a resistor divider which gives a bit more signal, but basically doubling the ADC readout and then dividing by 100 does give us plenty of headroom in case someone encounters some really crazy UV exposure. Additionally, we added a slow on-off warning blink should the ADC return a maxed-out value.
