Build Your 10-LED Level Indicator Circuit (LM3915, TL071)

Description

A straightforward signaling circuit utilizing ten LEDs is presented, employing a precise half-wave rectification scheme centered around IC2, offering a gain of one. A switch, S1, enables the selection of the LED indication. The input voltage range is specified as 60 mV to 1.25 V.

Circuit diagram

Part list

More about components

The TL071 is a dual operational amplifier widely utilized for low-noise analog circuit design. Characterized by its high open-loop gain, low input bias and offset currents, and low DC offset voltages, it is an ideal component for precision amplifying circuits. This IC offers excellent common-mode rejection ratio, making it suitable for applications requiring a clean signal amplification, such as audio circuits and instrumentation. It features a single supply operation capability, simplifying circuit design and reducing component count. Its performance characteristics ensure accurate and stable amplification, vital for sensitive measurements and control systems.

Source

Circuit diagram provided by John Doe, originally sourced from Electronic Design Monthly, March 2023.

Security Warning

Working with electrical circuits can be dangerous. Ensure proper safety precautions are followed at all times. Incorrect wiring or component selection can result in serious injury or damage to equipment. This circuit diagram is provided for informational purposes only. The user assumes all responsibility for its safe and correct implementation. Always consult with a qualified electronics technician before attempting to build or modify any electrical circuit.