Arduino Bar graph Stereo VU meter on VFD display GP1287
https://maker.pro/arduino/projects/arduino-bar-graph-stereo-vu-meter-on-vfd-display-gp1287
A simple Stereo VU (Volume Unit) meter that represents the intensity of an audio signal using a series of bars. VFD Display type is GP1287.
DIY Arduino VFD display 20x2 VU (Volume Unit) Meter
https://maker.pro/arduino/projects/diy-arduino-vfd-display-20x2-vu-volume-unit-meter
How to make a VU meter with 38 bars per channel on a modified 20x2 VFD display.
DIY Analog style Stereo VU meter on I2C Oled
https://maker.pro/arduino/projects/diy-analog-style-stereo-vu-meter-on-i2c-oled
How to make an extremely simple but visually effective VU meter at 0.9 inches Oled displays SSD 1306
DIY Simple FFT Spectrum Analyzer on 16x16 LED Matrix
https://maker.pro/arduino/projects/diy-simple-fft-spectrum-analyzer-on-16x16-led-matrix-1
Visually beautiful spectrum analyzer that can also function as an Audio VU Meter and Waterfall Analyzer.
Arduino Ohm Meter
https://maker.pro/arduino/projects/arduino-ohm-meter
The main principle behind this is the voltage divider network.
Arduino flicker meter-Determining the quality of light bulbs
https://maker.pro/arduino/projects/arduino-flicker-meter-determining-the-quality-of-light-bulbs
Numerous studies have shown that flickering, Although high frequency and then totally invisible, It can also cause headaches, eyestrain...
Arduino Liquid Level Meter with simple Homemade Sensor
https://maker.pro/arduino/projects/arduino-liquid-level-meter-with-simple-homemade-sensor
How to make a sensor yourself, and then with the help of a microcontroller to accurately determine the level of liquid in the container.
Arduino Tachometer (RPM meter) with IR sensor module
https://maker.pro/arduino/projects/arduino-tachometer-rpm-meter-with-ir-sensor-module
A very simple way to make a tachometer where the result is displayed on an OLED display in the form of an RPM number and a progress bar for greater visibility.
Arduino Can-Bus (Wired) Communication
https://maker.pro/arduino/projects/arduino-can-bus-wired-communication
Learn how to use CanBus module.