Test the light level with which photocell and integrated op-amps

Recommend you use the high-precision rail-to-rail dual op-amp OPA2333, which is a commonly used rail-to-rail op-amp, and the output amplitude can be very close to the supply voltage. It is low-power, small-size zero-drift amplifier. It realizes the perfect combination of high precision, micro-power consumption, and a micro-small package.The OPA2333's excellent features of ultra-low misalignment (2uV), ultra-low quiescent current (17uA), operating voltage as low as 1.8V, and SC70 or SOT23 packages, make it an ideal choice for applications such as medical instrumentation, temperature measurements, test equipment, security, and consumer applications. The price of this op amp is not very high, usually in the range of $5 to $10. It is recommended that you get the OPA2333, which is a dual op-amp, and the OPA333, which is a single op-amp. When using it you should connect it to be used as an in-phase amplifier, otherwise it will drop the photocell voltage because of the low input impedance of the amplifier.