Weak Light Measurement Circuit

Published:2011/4/27 18:41:00 Author:Christina | Keyword: Weak Light, Measurement | From:SeekIC

The PD in this figure is one kind of photodiode such as S1226，S1336，S2386.etc (produced by the Hamamatsu Corporation), A1 is the operational amplifier, model can be the AD515，OPA111，OPA128.etc; A2 is the operational amplifier OP-07; capacitor (C1) can use the 10 to 100pF burning polystyrene capacitor; feedback resistor R is the metal glaze resistor, the maximum is 10GΩ; K is the low-leakage relay. The whole circuit is in the metal shield box, the shield box and the circuit ground is connected. In the figure, W is the pioneer 0 circle precision potentiometer.



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