The Primary Data Cable

The Primary Data Cable is the link from the computer to the twin Grinchs. Its a homemade cable that is made from a printer (DB25) cable that we weren't using. Only 4 of the pins out of 25 are used and are grafted onto another cable that is commonly used as an ethernet cable (RJ45). Of the 8 pins of that cable again, only 4 are used. It took some time to identify the wires leading to the correct pins and attach them to the correct wires of the RJ45 since not all cable companies use the same color code. After splicing the cables together, We checked and rechecked to see if it was correct with a multimeter to make sure it had continuity along the right wires and pins. We ran a plastic wire across the joint and ziptied it to give it added strength to avoid being pulled apart. On top of that, a good amount of tape was applied to give it a better look. This cable will be in the house and won't get any moisture on it (unless I spill my tea on it) so it will be mostly safe from harm.

Schedules and Updates

When you have a deadline to meet, its best to have a schedule to keep you on track. For the most part, this is a good idea and a fair percentage of the time it works out. However, life doesn't live on a schedule so its best to have a PLAN B. The arch light elements we had planned didn't seem to be working out, instead we changed that design into a "light fence" that will be 160' in total. Sometimes you roll with the punches. So far, we haven't had a lot of major setbacks (crosses fingers). Its time for a status report on our progress, so here it is...

Software: 100%

Sequences: 50%

Data Cabling: 10%

AC Cabling: 20%

Yard Audio System: 100%

FM Transmitter System: 100%

Grinchs: 50%

SSRs: 1 of 32 completed

Mini-trees: 50%

Mini-MegaTrees: 20%

Star: 0%

Light Fence: 10%

Christmas Sign: 0%

Santas/Snowmen: 75%

String Lighting: 80%

Build it yourself and keep it simple.

The Mini-tree
A simple light element you can build is a Mini-tree. Its a 3 foot tall cone shape made of fencing wire with 1 or more sets of lights on it. The ones we are building have 2 colors or is it 3? on them. One set is white and the other is red for 4 of them and green for the other 4. The total of 8 Mini-trees will occupy 16 channels on our system. This amount of channels will give us total flexibility for chases, blinking and color flashes. 2 Mini-trees will share a SSR using 4 SSRs for the group. Using Vixen to control them, some songs have the trees acting like choirboys, blinking to wording or rythms.

The Mini-Mega-tree
Our 4 Mini-Mega-trees are a bit more complicated using 8 channels and 2 SSRs each. Each tree has 4 "superstrings" on it and is about 6 foot high. A superstring is 2 or more strings of lights braided or twisted together to form a larger string with multiple channels. Our superstrings are 1 string of white braided with 1 string of blue. Each superstring is strung up and down from the top of the tree to the ring below at an angle 6 times in a quarter circle. Turning each channels on and off will give the illusion of a white tree a blue tree or a combination. Spinning, chasing and flashing effects are possible in many configurations.

The Mega-tree
In a future expansion of our system, we will make a Mega-tree. It will be about 10 to 20 feet high depending on what lights we can get. The construction of the tree is more complicated than any of the other trees. A footing must be secured at the base such as a pipe in concrete or a large base stand anchored with stakes deep into the ground to prevent the wind from blowing it over. A "topper" is placed on the top of the pole in the center of the base. The topper will have a star of some type on it, probaly a spinning set of star shaped set of lights. The topper also have anchors to hold the top end of the lights leading down to the ring at the base. At the ring near the base, the plugs for the strings will attach to the SSRs. The amount of SSRs will depend on how many channels we will assign it. We will probally have a tree with 24 or 36 channels. A multiple of 4 channels is preferred because of SSRs are configured in sets of 4 and also timing of music is usually a 4/4 beat.

Hunters and Gatherers

Once you decide to make this big wonderful dazzling display of photons, where do you get all the lights? From anywhere you can! A good price per unit is a nice thing but not at the expense of cheap strings that will fall apart and ruin your fun. Shop at places like Goodwill, yard sales, after Christmas sales, wholesale outlet even Craigslist. We purchased 50 quality 4' by 6' net light sets for 100 dollars off of Craigslist. Use your head and play it smart. After all, you may not get what you pay for. Make a list of what you need and stick to it. Upgrade next year. Other things to buy are extension cords, matierials for props, kits to make non-lighted props and other things. Think ahead and save bread.

Audio Components

Music being a big part of the show must be heard but how? Using spare parts from another computer audio board, we made a cable with 3 jacks on the end. One jack is for my computer's own speakers so we can hear what we are broadcasting. Another jack is used for audio that is ran out to the yard for people to hear it on the speakers hidden in Snoopy's doghouse. Paired up with the cable is another type of jack (RCA) leading to the FM transmitter we bought from Canakit.com for about 20 dollars. The range of the transmitter was supposed to be 500 feet but at 5 blocks away, you could still hear it. So we might broadcast Christmas music even if the lights are off. Noise ordinances forbid loud music after 10 PM so we won't play the yard speakers after that.

The Hardware

The subprocessor boards (Grinchs) were ordered from a man in Austrailia. Wjohn at doityourselfchristmas.com has boards for sale and also the SSR boards. 2 Grinchs and 32 SSR boards cost us 100 dollars including shipping. Its not a bad price considering you don't have to hand etch 34 circuit boards. Boards arrived safe and were of very good quality manufacture. To clarify, the Grinch does not dim or fade the lights although another type of board can be added later to do that job. We chose the Grinch because of cost vs light effects. The parts to populate the boards were ordered from USA companies and assembled here at our home. Over several nights, they were put together and checked, rechecked and checked again. Actual testing will be done when some of the light elements are done and good weather permits. Having a limited budget for this hobby means that not everything can be done in a timely manner. Use what you got to do what you can until the next bit arrives. The SSRs can be made in an assembly-line type of fashion because they are the same. Take it step by step to elimanate mistakes.

Light Elements

A light element is a section of the display that will be controlled by a single channel or many channels if it is an animation element. A string of lights is usually a common type of light element while others can be very complicated. Some elements such as light archs can have many channels controlling it in a sequence to give the illusion of water jumping in a arc or like a mega-tree with 24 channels giving the illusion that the tree is spinning in multi-color. Options for light elements are unlimited. A Santa train can have each engine and car body lit up while the wheels can be controlled by a few other channels making it look like they are turning. Snowmen can have snowball fights, elves throwing gifts into Santa's sack, Angels singing, toy soldiers drumming you name it. By turning on and off of a few channels, movement can be simulated and magic happens! Choosing which elements to add is a tough one because the imagination runs away. Start with the basic lighting elements such as the house and major points in the yard, counting channels as you go. With the leftover channels, you can get creative and make a few elements from scratch. Basic matierials going into contruction of a light element will be specific for the kind of element it is. A simple Mini-tree is 1 to 3 strings of light wrapped around a cone shaped bit of fencing wire held on by some zip ties. Sounds simple enough but the results in the dark are amazing. Some other examples are stars made from plywood stuffed with lights, archs made from plastic pipe and wrapped with strings of lights and Mega-trees made from poles staked into the ground and strings draped at an angle around it. During the day, these contructions don't look like much but at night are spectacular!