POV (Persistence of Vision) – Open-Source Arduino Nano Hardware

Rajkumar Sharma
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SKU: EL114713
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This is an easy and simple hardware to create a POV display. The hardware consists of a Hall sensor, Arduino Nano, 17 x 5mm LEDS of various colors, etc. The Hall Sensor is connected to analog pin A5 with a pull-up resistor. The circuit works with 3.7V to 5V DC and a 3.7V battery is ideal to use. The user may use as many LEDS as required. This project can also be used to create many applications such as Bar-Graph display, LED light effects. A large 8.5 mm hole is provided to mount the motor coupling. Refer to the diagram for mounting the hall sensor, motor, and magnet.

POV or persistence of vision refers to the optical illusion that occurs when visual perception of an object does not cease for some time after the rays of light proceeding from it have ceased to enter the eye. The illusion has also been described as “retinal persistence”, “persistence of impressions”, simply “persistence” and other variations.

More Information is available here: http://electronoobs.com/eng_arduino_tut21.php

Arduino Nano Pins

Hall Sensor: Analog Pin A5 with Pull Up resistor, Normally High and goes low when magnet is near to the sensor.
LED D2 to D18: Arduino Pin A4, A3, A2, A1, A0, D13, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12
LED D1 : This LED is optional and not installed, user may assemble this LED if the board is used for other application.

Arduino code is available to test the board. The code makes use of 6 LEDs, refer to the diagram to mount the PCB on the motor shaft, Magnet, and Hall sensor potion.

Credits: Original Author of the Arduino Code is Palak Mehta.

Features

Supply 3.7V to 5V DC
On Board 17X LEDs – Various Colours
On Board Hall Sensor
Multiple Mounting Holes for Mounting the battery
5MM Mounting Hole for Motor Shaft
PCB Dimensions 194.95 x 29.37 mm

Schematic

Connections

Mounting on motor

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	3	D1,C1,R21	DNP
3	1	C2	47uF/25V	NICHICON	DIGIKEY	493-15345-3-ND
4	1	C3	1uF/10V SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
5	2	D2,D3	LED-ORANGE 5MM THT	WURTH	DIGIKEY	732-5018-ND
6	2	D4,D5	LED-YELLOW 5MM THT	BROADCOM	DIGIKEY	516-3193-2-ND
7	4	D6,D7,D8,D9	LED-RED 5MM THT	SUN LED	DIGIKEY	1497-1031-ND
8	8	D10 to D17	LED-GREEN 5MM THT	CREE	DIGIKEY	C503B-GCN-CY0C0791-ND
9	1	D18	LED-BLUE 5MM THT	TT	DIGIKEY	365-1180-ND
10	2	R1,R20	0E SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
11	16	R2 TO R17	330E 5% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
12	1	R18	100E 5% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
13	1	R19	10E 5% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
14	1	R22	10K 5% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
15	1	U1	ARDUINO NANO	ARDUINO	DIGIKEY	1050-1001-ND
16	1	U2	A1102LUA-T OR A3144	ALLEGRO	DIGIKEY	620-1003-ND