How to measure light intensity with photodiode, using nrf52832?

Question

Im using PCA10040 nrf52832 to measure light intensity with photodiode, 
 im using SAADC and SPI example to measure values but im not able to see any changes on UART as light intensity changes. 
 please suggest.

awneil · Accepted Answer

You never mentioned any amplifier - we are not mind readers! 
 But, again, start simple! 
 Start with the SAADC example, to learn to use the SAADC on its own . 
 Then use an SPI example, to learn to use the SPI on its own . 
 Then - once you have understood both parts and have them working well - bring the two together. 
 Note that a photo- transistor should give you a usable voltage without the need of an amplifier. 
 Digital light level sensor are also available

awneil · Answer

Pooja Vernekar said: Connected AIN0 (P0.02) to VDD. 
 You need to swap it between VDD and GND to see a change

How to measure light intensity with photodiode, using nrf52832?

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