Introduction: Led POV SMD PCB

Hello everyone, I bring a very interesting project and I like a lot, a Led POV which creates the illusion of seeing a number of characters from a row of leds that are rotating.

This project was created several years ago, and I share the idea to build.

The first thing I did was prepared with 8 standard leds, controlled by a PIC16F84A and to rotate them a blender was used.

Step 1: Suplies


- PCB Wizard

- Any program to PIC (a used PicBasic)


- 1 x PIC16F887 SMD

- 15 x leds blue SMD and 2 x infrared leds (transmitter and receiver)

- 15 x Resistors 220 ohm SMD, 3 x resistors 1k ohm SMD, 1 x resistor 10k ohm SMD, 12 x resistors 0 ohm SMD, 1 x resistor 22 ohm and 1 x resistor 220 ohm

- 6 x pin headers female right angle and 4 x pin headers male right angle

- 2 x Button

- 1 x Crystal oscillator 4MHz

- 2 x Ceramic capacitors 15pf, 2 x ceramic capacitors 100nf, 1 x electrolytic capacitor 100uf and 1 x electrolytic capacitor 10uf

- 1 x Voltage regulator 7805

- 1 x Diode 1N4007

- 1 x Battery holder 9v

- 1 x Battery 9v

- 1 x Switch

- 6 x Jumper wires

- 1 x Old motor microwave fan

- 1 x Terminal block two pin

- PCB copper, ferric chloride, toner print, photographic paper, spray varnish, clamps, wire cutter, hot glue silicon and Dremel

Step 2: PCB Design

This is my PCB design, SMD devices was used to minimize space.

The software that was used PCB Wizard, adding the library for resistors SMD and PIC SMD.

So too the PCB voltage regulator was battery 9v design.

I leave the files of the two PCB.

Step 3: PCB Completed

These are the final results of the PCB, I used the toner transfer method, welding was done in the traditional way using liquid flux.

You see, the connections of the 9V battery to the regulator PCB and then feeding the main PCB.

On the main PCB is to left two buttons to use, and a ICSP connector for programming PIC.

Step 4: Assembly

To rotate was used old motor microwave fan, this coupled with a Lego piece that worked us to place all components on it. Stuck with hot glue silicon and epoxy glue.

He was held with a piece of wood, and a container base with cement to have it stable.

Infrared leds were used to have a starting point character, and they remained static.

Step 5: Program

For testing will use the PicBasic program, it is a very good start for those who do not know much about programming, and program charge to the PIC with PICkit 3 through the ICSP connector.

This is where you can experience and be able to use other editors to program.

The program is very simple, because the leds lighting will from time to time, it must be very small, this making it row by row the effect of creating characters visible.

I share small programs to test the operation.


Step 6: Final Result

You can watch the video with final results.

For those who want to experience, you can create text, propeller clock and drawings is a matter of imagination.

Thanks for visiting and reading this post.

All pictures and videos are my property.

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    6 Discussions


    1 year ago

    Hello friend one question, What were the types of steps to iron PCB board?

    jyax garcia
    jyax garcia

    Reply 1 year ago

    The first thing is the materials, I use glossy photographic paper impregnated with a laser printer. The approximate time of ironing is about 3 to 5 minutes, presying a little, I use a silk-screen ironing paper between the plank and the pcb to avoid damaging it by heat. Finally, when removing the iron, it is immediately immersed in water, leaving it to rest for several minutes, then slowly removing the paper, leaving the toner to the pcb, finally it is submerged in the acid. This was the last method I used to make my pcb, it will not always come out the first time, it's that you get used to the method.


    1 year ago on Step 4

    Hello friend, a question about the infrared leds (transmitter and receiver). Where are going to connect the receiver led infrared ?, Are the cables not entangled when turning?

    jyax garcia
    jyax garcia

    Reply 1 year ago

    The infrared led receiver connects to any pin of the microcontroller that is not being used, this being connected to the circuit that rotates also does it together, you just have to insure it very well since the turning force tends to be safe. And the emitter led is connected to a battery or external source.


    Reply 1 year ago

    Ok, Could you provide me with your phone number?

    jyax garcia
    jyax garcia

    Reply 1 year ago

    Is +502 3020 2645