Linear light-meter circuit

Posted on Aug 10, 2012

This circuit uses a low-input-bias op amp to give a steady dc indication of light level. To reduce circuit sensitivity to light, Rl can be reduced, but should not be less than 100 K

Linear light-meter circuit
Click here to download the full size of the above Circuit.

The capacitor values in the circuit are chosen to provide a time constant sufficient to filter high-frequency light variations that might arise, for example, from fluorescent lights.

Leave Comment

characters left:

New Circuits



Popular Circuits

Car 20W audio booster amplifier
simple mic pre-amp based LM358
high frequency waveform generator
RGB To Color Difference Converter
LM4844 Stereo 1.2W Audio Sub-System With 3D Enhancement
Versatile Op Amps Need No Resistors
Micropower Low Noise Boost Converters with Output Disconnect
Precision current sink sourcel
TMPO1 internal functional block diagram and basic application circuit
A simple remote control switch circuit
Digital circuit touch delay circuit 3
Light control principle circuit rooster crows