Instructables

POV Christmas Tree

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Picture of POV Christmas Tree
Still don't have a tree for this holidays?, Don't worry here you have a small, reusable, eye-catching tree for your holiday needs.


This project started as a SMD soldering tutorial for a course i've made in electronics, so it's meant to be a one day project to learn a little bit of SMD soldering and also have the coolest of all trees.
 
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Step 1: Gather the materials

Picture of Gather the materials

For making the Awesome POV tree you will need:

1x    PIC12F689 or 1x PIC12F675 (PDIP8)
1x    8 pins IC socket
1x    LM7805 5V voltage regulator
1x    0.1uF capacitor 50V (1206 SMD)
1x    10uF capacitor 16V (1206 SMD)
10x  220R resistors 1/4W (1206 SMD)
9x    220R resistors 1/10W (0603 SMD)
1x   10K resistor 1/10W (0603 SMD)
18x  Green leds  (0805 SMD)
10x  Blue leds (0805 SMD)
1x    White led (0805 SMD)
1x    Pushbutton (5mm height)
1x    9V Battery clip
1x    9V Battery
1x   15x8cm PCB board
1x   12cm brushless fan (also works with 8cm ones)

IF you build the optional speed controller:
1x  LM317
1x  220R resistor (1206 SMD)
1x  5K 1 turn potentiometer
1x 12VDC power supply or some more batteries
4   meters of small cable for the DC power line

All components are easy to source from any electronics dealer, in my case I just have all the stuff around in my room.


You will need some tools:

- Soldering iron (15-25W) fine tip
- 0,5mm rosin core solder (or anything you have in hand)
- Small wire cutter
- Fine tip tweezers
- Cardboard knife
- Metallic ruler or metallic frame
- Double sided tape or epoxy glue
- Magnifying Glasses or standalone magnifying glass


Also you will need a way to etch the PCB design.

Sorry, that info isn't the objective of this intructable, but follow this link for materials and method:
http://www.instructables.com/id/Sponge-Ferric-Chloride-Method-Etch-Circuit-Bo/step3/Etch-the-Board-Instant-Gratification/

Anyway my materials for etching are:
- Fine tip permanent marker pen
- Fine Steelwool
- Cheap magazine paper
- Ferric Chloride
- Small sponge
- Latex gloves
- Plastic Laminator (or iron)

And a way to program the microcontroller.
if you're building a programmer try the cheap and dirty "Pablin 2" with the Winpic800 software.
link: http://www.pablin.com.ar/electron/circuito/mc/ppp2/index.htm

If you want an usb programmer, bouy pickit 2 from microchip or build/buy a pickit2 clone
link: http://sergiols.blogspot.com/search/label/PICKit2Clone
link: http://www.microchipdirect.com/ProductSearch.aspx?Keywords=PG164120


dhopper1226 months ago

Suggestion: instead of etching away all of the copper and shortening the life span of your etching liquid, try outlining your traces just so the main lines are clear of the bulk of the copper you would have normally taken off. It will save you in the long run.

thisoldgeek9 months ago
Great project El_AMPo! I just built one of these and it works well. Only thing is, the LEDs are too bright. I feel like I'm going to go blind watching it... I'm using a 9V battery like your instructable to power the tree itself. Is there any simple way to dim the LEDs? Could I lower the voltage somehow, put in a diode or a resistor?

Thanks again for the great work. My wife loves it!
jlforma1 year ago
We are coming up to Christmas and enjoyed making this Christmas tree that taste very nice. Someone help me pose ... I can not download the file code "Tree + Firmware PCB 2.0.rar60 KB". Someone can help me. My email is: joaolimaferreira@gmail.com. Thank you.
El_AMPo (author) 3 years ago
Muy bueno Andres
Felicitaciones
Lilian A.
afwin El_AMPo2 years ago
nice idea
thanks
punkzter3 years ago
Do you think that this project could use an attiny chip?
El_AMPo (author)  punkzter3 years ago
Shure, but you would need to write the software
punkzter3 years ago
What does the "PDIP8" mean? I went to microchip direct and want to buy the chip. Is the equivalent chip the "PIC12F675-I/P"?

Also, does microchipdirect program chips for you? Would this save me from having to purchase a programmer? Does anyone know?

Thanks.
El_AMPo (author)  punkzter3 years ago
12F629 and 12F675 are pin compatible chips but the 1F675 has analog to digital converter that is not used for this aplication. PDIP8 means they are dual in line 8 pin through hole devices.
Microchip direct refuses to work for my country, but is a nice source, also they have free samples.
For the programming part sorry, the only way is to make a cheap programmer or find someone to program the chip
When I go to MicroChip direct, they have so many different options for this chip:

http://www.microchipdirect.com/ProductDetails.aspx?Catalog=BuyMicrochip&Category=PIC12F675&mid=10&treeid=1

Could you help me with picking the correct one?
papalevies3 years ago
Is there a way to connect the power cable to a battery outside the fan instead of on it? Some kind of mechanism that enables cables to not get twisted when passed through a rotating assembly such as this?
El_AMPo (author)  papalevies3 years ago
Yes it's possible, search for "rotary contacts", but beats the simplicity of design and the objective of this circuit
Great instructable..
One question though..

What is POV?
El_AMPo (author)  Greasetattoo3 years ago
POV: Persistance of Vision
Is the analogous to your eyes "refresh rate", where the light dalays a little to go away, the camera flash persistance effect is a simple example of the effect.
Tube TVs and multiplexed led displays work this way.
POV stands for Persistence Of Vision

Basically the eye is too slow to notice and capture fast moving things, the eye can be tricked into seeing a solid and continuous visual image, when in fact it is a high speed, set of dots or pixels that are moving too fast for the eye to capture.
Thanks, that is what I thought..

I used to work in a ray-traced program called POV.
http://www.povray.org/

Thanks for your answer!!!
TOCO3 years ago
really cool. great ible!
AWESOME!!!
just too much work for me heheh...
El_AMPo (author)  computer_guy3 years ago
Took me one afternoon to complete it, if you have all the materials
zack247 El_AMPo3 years ago
and the skill :) (i dont)
milkyapple3 years ago
This is pretty awesome.
abran53 years ago
I wish i could make that
Great instructable, reminds me the adafruit promise

http://www.adafruit.com/promise.html
lemonie3 years ago

I like it!

L
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