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Parallax TSL235R Manual

Light to frequency converter arduino demo

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TSL235R Light to Frequency Converter (#604-00084) Arduino

Demo

Please note: This demo was created to support the 2013 National microMedic Contest kits,

which are no longer available.

The TSL235R Light to Frequency Converter registers the intensity of light, and outputs a

corresponding stream of pulses. The frequency of these pulses is proportional to the brightness of

the light. This demo connects the TSL235R to the Board of Education Shield for Arduino and

displays sensor values in the Serial Monitor.

At lower brightness, the sensor outputs a series of pulses at a low frequency.

•

Conversely the higher the brightness, the higher the frequency.

•

A main benefit of the TSL235R sensor is that it has a higher range of light intensities it can

respond to, compared to typical all-analog sensors. With appropriate modification of code, it can

function in very low or very high light situations.

Connections

To connect the light sensor to the Arduino Shield, attach the three leads of the device as shown

in the figure.

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Page 1 Conversely the higher the brightness, the higher the frequency. • A main benefit of the TSL235R sensor is that it has a higher range of light intensities it can respond to, compared to typical all-analog sensors. With appropriate modification of code, it can function in very low or very high light situations.
Page 2 = millis(); temp = count; freq = temp - oldcount; avg = avg + freq; if (loopcount % 50) { Serial.println(avg / 50); avg = 0; loopcount = 0; loopcount++; oldcount = temp; Copyright © Parallax Inc. Page 2 of 3...

604-00084