VU Meter 5: UAA180 Circuit Diagram & Build Guide

Description

This measurement circuit for level utilizes the UAA180 from SIEMENS and a refined rectification circuit surrounding the IC2B. The adjustment has been accomplished in 3dB steps between adjacent LEDs, guaranteeing a highly accurate response when measuring incoming acoustic signals. The LEDs can be configured as squares, and when positioned adjacent to each other, they produce a bar graph display, devoid of any gaps.

Circuit diagram

Part List

All Resistors are 1/4W 1% metal film

More about components

The UAA180 is a versatile operational amplifier produced by SIEMENS. This integrated circuit is known for its high performance characteristics, including low offset voltage, low drift, and good common-mode rejection ratio. It is commonly employed in various analog applications, such as signal amplification, filtering, and instrumentation. It is a single-supply, low-power operational amplifier designed for precision applications, offering excellent stability and a wide operating voltage range. The TL072 is a low-noise, JFET-input operational amplifier, which provides high input impedance and low DC offset. It's suitable for applications where accuracy and stability are crucial, like audio circuits and instrumentation.

A warning: Improper handling of electronic components can result in personal injury or damage to equipment. Always observe appropriate safety precautions and consult with qualified personnel before working on electrical circuits.

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