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Analog Style VU Meter on OLED Display – Arduino Compatible
This is an analog-style VU meter on a 0.96″ OLED Display. The project has a 0.96″ OLED display, Atmega328 Microcontroller, 3.5 mm audio EP socket for audio signal input. This Arduino compatible hardware can be program using Arduino IDE. Operating Supply 5V DC.
Analog Style VU Meter on OLED Display – Arduino Compatible – [Link]
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VU meter over i2c, yikes! You need not only SPI, but HW SPI just to get close to speed and smoothness of a real mechanical VU meter.