Analog Style VU Meter on OLED Display – Arduino Compatible

Rajkumar Sharma
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SKU: EL113356
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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.

Specifications

Operating Supply: 5V DC
0.96″ OLED display
Arduino Compatible
PCB dimensions: 40.48 x 27.31 mm

Connections

CN4 or CN3: Audio Signal Input (From Headphone or Audio Signal)
PR1 Trimmer Potentiometer: Audio Signal Level Adjust
CN2: Programming Connector
CN1: OLED Disapply 0.96 Inch – 4 Pin

Resources

Credits: Arduino Code Author is Mirko Pavleski
Project page: DIY Analog Style Stereo VU Meter on I2C OLED

Arduino Programming

Arduino code is available as a download to test the project. A new ATMEGA328 chip is required to bootloader flashing before programming the microcontroller with Arduino IDE. For more info check the link below:

https://www.arduino.cc/en/Tutorial/BuiltInExamples/ArduinoToBreadboard

Schematic

Parts List

NO.	QNTY.	REF.	DESC.	MANUFACTURER	SUPPLIER	SUPPLIER PART NO
1	1	CN1	4 PIN MALE HEADER PITCH 2.54MM	WURTH	DIGIKEY	732-5317-ND
2	1	CN2	8 PIN MALE HEADER PITCH 2.54MM	WURTH	DIGIKEY	732-5321-ND
3	1	CN3	OPTIONAL
4	1	CN4	3.5MM FEMALE EP SOCKET	CLIFF	Element14	2518188
5	2	C1,C3	0.1uF/50V SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
6	1	C2	10uF/10V SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
7	2	C5,C6	22PF/50V SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
8	1	C7	10uF/16V SMD SIZE 1210 OR 1206	MURATA/YAGEO	DIGIKEY
9	1	D1	1N4148	MICROCHIP TECH	DIGIKEY	1086-15170-ND
10	1	PR1	10K TRIMMER POT	NIDEC COPAL	DIGIKEY	CT6EP103-ND
11	1	R2	0E SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
12	1	R3	1M 5% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
13	2	R4,C4	DNI		DIGIKEY	DO NOT INSTALL
14	1	U1	ATMEGA328TQPF-32	MICROCHIP	DIGIKEY	ATMEGA328PB-AURCT-ND
15	1	X1	16Mhz	ECS INC	DIGIKEY	X1103-ND
16	1	R1	10K 5% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
17	1	OLED	BLUE 0.96" OLED Display I²C 4-PIN		ALIEXPRESS