How to Listen to Light

Step 5: Test the light sensor (in DC mode)

This is just a quick test to see if the light sensor is working, not wired up backwards, etc.

I switch my multimeter in small-dc-current mode, then connect the probes to the audio plug and see what happens.

It looks like the light from the fixtures above is causing the solar cell to produce about 20 microamps of current.

This is good.