Green LED measurements p3

Continued from Green LED array measurements p2

At 2:42 pm PT, 78 F, the green LED array, radio shack part number 276-009, was producing 588 mV DC, and climbing. It is noted that the LED array DC voltage will begin to slowly decrease when the electrometer is connected to it, which is nothing unexpected, for technical reasons that are beyond this blog post. In one sentence, the electrometer input bias current has higher precedence than the LED array, which causes a very slow disturbance to the diodes. I have left the electrometer on for the past several hours, and merely tilt it to take a measurement.

Between ~ 2:42 pm and ~ 2:25 pm the green array charged the 0.01 uF capacitor from 480 mV to 588 mV DC, which comes to ~ 1.1 pA. The resistance cannot be calculated since we do not know how much DC voltage the array was producing at that very moment.

Continued at Green LED array measurements p4

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