Bar graph light meter by ic 741
If you want simple meter the intensity of the light in a simple way. This circuit is very interesting, because with a LED display with 5 levels.The main equipment is uA741 the most popular op-amp circuit, to used the photo transistor is a device for receiver a lighting to change is electricity very low. We use IC1 acts boost up current, or to compare the voltage levels.The VR1 adjusts the offset voltage to the LED display complete , the intensity of light to measure.The power supply size use +9 V and -9V.
Related Links
Lighting Meter
Bar graph led display
Lighting Meter
Light Meter By LM334
Simple Light Meter by Photo Resistor
Temperature – Light Brightness Meter with LCD
Categories: Lighting, Meter Tags: bar graph led display, Led lighting circuit, lighting meter
or 
