Build a Logarithmic Light Meter Circuit Diagram, this is a very simple circuit, A light meter is a device used to measure the amount of light, The meter reading is directly proportional! to the logarithm of the input light power. The logarithmic circuit behavior arises from the non linear diode injunction current/voltage relationship The diode in the amplifier output prevents output voltage from becoming negative (thereby pegging the meter), which may happen at low light levels due to amplifier bias currents. Rl adjusts the meter full-scale deflection, enabling the meter to be calibrated.
Logarithmic Light Meter Circuit Diagram
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