Uploaded November 2024 | Updated September 2026, 2 weeks ago
The MB-57 Audio Glow Meter kit is designed to detect sound using a microphone, amplify the signal with an LM386 audio amplifier, and control a 10-LED display via an LM3914 LED driver to reflect the sound intensity. Each LED has a current-limiting resistor, and an SPDT switch allows selection between dot or bar display modes. The kit converts the audio signal to a DC voltage for display, involving amplification, rectification, and smoothing. A potentiometer adjusts the amplification of the audio signal, optimizing performance for user preference, and the system is powered by a 9V DC input via J1.
User Manual:
For more information, kindly visit our website:
The MB-57 Audio Glow Meter kit is designed to detect sound using a microphone, amplify the signal with an LM386 audio amplifier, and control a 10-LED display via an LM3914 LED driver to reflect the sound intensity. Each LED has a current-limiting resistor, and an SPDT switch allows selection between dot or bar display modes. The kit converts the audio signal to a DC voltage for display, involving amplification, rectification, and smoothing. A potentiometer adjusts the amplification of the audio signal, optimizing performance for user preference, and the system is powered by a 9V DC input via J1.
User Manual:
For more information, kindly visit our website:
