POV by Using Seven Segment Display

In this tutorial we are going to see how to make pov display by using old seven segment display

Step 1: Components Required:

Arduino (use any Arduino boards)

Old LCD display

Reed Switch (1)

9V Battery and Adapater

1k Resistor (2)

DC motor

Wheel (1)

Magnet (1)

Few Wires

12V use old charger

Step 2: Soldering Seven Segement Display:

Solder the apporiate pins to turn on straight array of led inside the seven segement

After checking few hours i find right pins for me . Because it vary for other seven segment display I took this

seven segment from OLD oninda dvd player

Step 3: Assembling:

1) First place the seven segement in a rectangular pvc pipe by using plastic zip lock

2) Now make the rectangular pvc flat and put two holes for fixing arduino

3) Fix the arduino with pvc by using screw and nut

4) Connect Battery to arduino Vin pin and Gnd

5) Connect reed switch state dectection circuit under the pvc

6) Now Glue the wheel under the pvc

7) place a magnet to turn on the circuit

8) Now connect it with motor

Step 4: Circuit Diagram :

LED Chaser Code Link

Make the circuit as per the schematics

Instead of Using Seven segment Display You can also LED

Before assemebling this part i have the LED in seven segment display

I have used the reed switch before . When the pov display start the spin it will print

the word entire circle it doesn't have proper start and stop position to fix this problem

I used a reed switch . Reed Switch (It is simple a switch in which circuit will be closed when we bring a magnet field close to the switch)

When it sense the magnet field it start to print the word in same position

Instead of reed switch we can also use Hall effect sensor , Proximity sensor

Step 5: Coding:

code link

Enter the word to print

Select the port number and board type

Upload the program