Circuit Project Electronic

This is circuit Simple Light Meter, I use Poto Resisitor for sensitivity light.
And display ligh value by M1 or mini meter 1mA.
It is very small circuit,have lot part electronics and,very low cost.
R-100K for Control light sensitivity
Cds = Poto Resistor
Detail more, Please read in this image circuit.
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Circuit measures the temperature and ambient brightness of the surrounding environment at the location it is placed. The data from the ADC is the calculated and displayed on the LCD. The main CPU unit on board the device is the PIC16F873.
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Used to test TV and VCR remote controls
The circuit can be powered from a small 9-12 volt DC, 250 mA or greater wall transformer. It may also need an additional 1000 uF filter capacitor across the DC output if the wall transformer does not have a built in capacitor. For use with a 9 [...]