Category Archives: Uncategorized

Bass Tube DIY

For a long time I have been very interested in building speakers… for home, for stage, for car and for outdoors… I have tried many different styles and types of enclosures… but I came home from work and looking around in my garage I decided to build a very quick bass tube out of free junk I have collected. i have always wanted to try this type of tube style with the extra added horn/port… and i figured I would capture some photos along the way to show the build.

I did some very basic calculations to find the perfect length and using the data sheet for the speaker (a Pyle Power Series Dual Voice-Coil 4-Ohm 6.5-inch 600-Watt Subwoofer) I optimized the volume for the 40 to 50 Hz frequency. Now the spec for the speakers says the range is 38 to 70 Hz, but the port will be tuned for 53 Hz.

woofer spec

Some plastic tube and a cardboard tube (all free) will become the body, some scrap particle board will hold the speaker at one end and the other end the speaker connection. Some blanket matting will become the interior tube baffle or damping material, and some wire will be run the length to ensure I have good connections to the speaker (once it arrives in the mail).

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Plastic tube is cut to the correct length which is based on the volume needed for a ported enclosure.. in my case it was 27 inches.

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Here is the peices cut… the ends have a flat edge to keep the speaker from rolling around.

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Some glued in matting… a dry assembly and now to put it all together. (Right photo: Looking down the tube cut in half to make the port.)

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I just used some construction adhesive to join everything… since it is ported I am thinking the pressure will be minimal and not fatigue all of the parts connection points. I might run a few drywall screws in key locations just to be safe before I cover the tube.  HEY! There is the Stuka! My 1968 BMW 2002 in the garage for the winter taking a nap and on the trickle charger!

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For now… I will let it dry and wait for the speaker to arrive… once I get the woofer I will finish the build, conduct a measurement recording of a sweep frequency of 20 Hz to 70Hz and plot the data for a review and blog post. I hope to have it done soon!

 

3D Printer (Do it myself)

I wanted to try and start this project about a year ago and I finally made myself this week start to compile all of my hardware that I have been salvaging, hoarding, finding, purchasing and saving. I have been looking through my Make Magazine 3 D printer edition and seeing how others are making professional printers and realizing i can make one myself.  ( http://makezine.com/comparison/3dprinters/ )  This guide shows the quality, accuracy, cost, print size, etc… which provides the basic 3 D printer purchaser a way to find the right choice.

A 3D printer is something I have been thinking would be good for all my other electronic projects, to build housing, mounting hardware, special mechanical assemblies… I think it will also be good to learn the electronics and hardware behind the new products that are flooding the market… my print area will be approximately 8 inches by 8 inches by 10 inches… not to bad for a first 3D printer and for the size a commercial printer would be in the $1K to the $1.5K range.  My cost so far… about 40 bucks! I bought the stepper motors used and they are capable of a half step (around 0.9 degree) SO… 400 HALF STEPS would be one 360 revolution on the shaft.

Below is the frame made our of 1.5 inch 80/20 stock aluminium, saved from a dumpster during a cleaning at MSI, a small micro satellite company that was purchased by SNC during my time in Littleton, Co.  I saved roughly $80.00 but was limited to the size of the pre-cut stock for my frame size… I can always increase the print size if i want to buy larger 80/20 stock… but for now the print size I have will work great .

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Below are the used, but good stepper motors I bought a while back in Colorado Springs at a little electronics shop that sells dismantled electronics.

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I even was able to get the power supply for free… just a general power supply out of a desk top PC… it is nice because the voltages and current supplied will be more than enough for the heat plate, spool motor, stepper motors for each axis and to power the electronics.

+3.3 Volts DC at 36 AMPS!

+5 Volts DC at 30 AMPS!

+12 Volts DC at 18 AMPS times 3!

3d printer_power supply

Next up, wiring diagrams and electronics… I want to pre-route the power wires, micro switches and stepper controllers to see what size my support housing and clearance for the motors, switches, and threaded rod needs to be.

After that… mechanical linkage, thread rod, mounting the steppers.

As I work on my printer I will be sure to capture more photos, provide electronics and wiring diagrams and hopefully by summer be printing for some cool Halloween stuff or a small something to send to my friends and family for holiday!

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Photo courtesy of Bulent Yusuf:

https://all3dp.com/best-sites-free-stl-files-3d-printing/

Can we ever get back to a “simpler life”?

I am kind of a pack rat.. I have an idea that the stuff I collect will someday be used in one of my great projects or that one of a kind reel to reel player some day will sit perfectly in a swanky retro nightclub and impress the bar flies.

When I look back on my collecting, it was never a focused venture… everything I collected could go into the garage, be cleaned up , restored and made to work (a lot of the time it was the challenge to make it work that fueled my desire to collect) and then brought into the house to be displayed like a trophy, a prize, an artifact that was from the past. At some point, i think to myself, there was a person who bought this item and had some amount of pleasure using, working, listening, playing with “said” item.  And now I, the new owner, want to make sure that this item can be used again, in a way that the person who bought the item would use it… an old tube radio, clicking the power on, waiting for the tubes to warm up, the static of the speaker as the electronics inside warm to a buzz and allow the FM radio station to tune in… of course now, it is a modern rock station playing through the whizzer speaker… back then though, back in the 1950’s …then maybe it was some Glenn Miller, or the local news… simpler times.

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My 1968 BMW 2002

Feeling a wave of nostalgia… IT IS the reason i ride a 1956 motorcycle, the simple cloths i wear, the idea that all the NEWER things in life, don’t really make us any happier…  the latest greatest cell phone can do pretty much everything, email, google search, video chat, play a game, tell us where to go and how to get there, and once we are there, we take a photo for evidence…also it will answer any question you have.

Ask your phone if you are a good mother or father, ask it to do your job, ask your phone to take a test for you… or spend time with your lover.

Is this really better than the simpler times… do we as a society need to take over a million selfies a day?

I promise… it will not have a good outcome, but yet this is what americans do… A father says, “I am friends with my son on facebook, I know what is going on with Johnny!” or “Siri … How do I manage anything in my life.. tell me what is on my calendar?….. OH REALLY it is my anniversary!?”  Like you are having a real conversation with a phone…

Once I thought we had a great world ahead for society… as an electrical engineer, designing and making really cool stuff seemed like the perfect world. Now I drive to work worried that the woman  texting in the car behind me is going to rear end me. I fear that the simpler world is day by day being shoved out the back door to make way for the “ALL” great new things…

…I digress… back to my first thought…  if you really think about it, if you see past the technology, couldn’t playing a board game like Scrabble, or a card game with your friends on the kitchen table, in the middle of summer, with the heat of the day cooling and the rain pitters outside the slider window… isn’t that what life is really about? A simpler time, meaningful time and interaction with friends…a fishing trip out to a stream, so far away from cell phone towers, a warm radio on your corner cabinet that plays a tune from yesteryear.

I don’t think anyone will really ever understand the dangers of technology… how it all is just a distraction from real life, meaningful life, a simpler life… something I long for… a simpler time.

Repent!
Repent!

 

Remembering a friend on Memorial Day

Capt. Joshua Byers, US Army…  Josh… a very good friend of mine in high school. Remembering Josh brings back so many good memories of my youth. Fort Ord, Seattle, Drill meets, inspections, bad self made hair cuts, boot shining parties prior to a big military inspection. I can remember the many hours on the Drill field where his leadership shined even as an 18 year old. I was honored to be apart of the JROTC Navy drill team with arms, under his command. I learned to love the feel of the parade rifle smacking my shoulder, counting cadence in my head, the rocks in my palms as our platoon did push ups. The hot sun, clear air and the loud bark of commands bouncing off the high school wall returning a haunting reminder of the movements we already performed. The school year was ending… 1992, I had already signed the delayed entry program for the USMC. Myself a Junior, with all the excitement of following in his foot steps, following in his lead in the JROTC program as he left for West Point at the end of his senior year.

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Newspaper clipping…

Josh and his Father, Lloyd (Left). June 1992.
Josh and his Father, Lloyd (Left). and of course my father Willie and me. June 1992.

I wrote him while he was attending West Point… now remember… a letter means a lot to anyone going through a military academy or boot camp, it brings a sense of connection back to you of your friends, the good times, high school and your home town. I would read his letter in my yearbook for inspiration, to laugh about the fun memories of the JROTC program (As I still do to this day), the good friend who made everything fun and to remember his mentoring ways.  Still looking to carry on a tradition that was passed down to me…as I completed my senior year as Cadet CMDR, and Drill team CMDR, I would read these lines… “The challenge ahead is one that you will never forget.. it is one that will not always be easy OR fun but one that will prepare you for Greatness…” he ends the same way I tell my friends… “I won’t say goodbye because I will see you again”. This small section of the  letter was written in a yearbook, something we all wanted to do was leave a great page of memories… of course this was always knowing that it was all a very short time before I too would go on to my own big adventure, with the idea that we would all return home for leave, visit old friends and even if the world made it possible see each other during our time and service in the military. I was out of the Marines in July of 1997… In the time that passed, life happened, I loss touch with many of my friends. And now that I was out of the Marine corps, i had my own things to take care of, I struggled with my own world, I moved to places that were new to me and started a new life… letters were never written, phone calls were never made. With a heavy heart, I never saw him again. I found out that he was killed by an IED in Iraq … a 29 year old Commanding officer of Fox Troop, an outstanding leader, a caring man, a brother, a son,  a great friend… gone… At the time of his death, July 2003, I was attending UNR obtaining my BSEE and was heavily into robotics… after hearing what happen to my friend I focused even more on robotics and designing sensors to help the military mitigate IEDs. I would think about how I would try and make a difference, I would think about my blessed life, and how I got to come home. I was going to live everyday to the fullest. And I do… Because “ I will see you again” is true… and I better have some damn good things to talk about and great stories to share with my good friend Josh. Until then, I remember Josh, along with all of my fallen friends, and all the men and women who have given the ultimate sacrifice for this great country. Please take a few moments this Memorial day and every day to really think about how great a world we live in because of those who gave all. To Josh… “God Speed My Friend… Hoo-ah!” and Semper Fi!

Butterflies!

My wife and I this weekend went to the Butterfly Pavilion in Westminster, Colorado.  Our first time there and we enjoyed the amazing amount of butterflies and the garden they are housed in, made for an enjoyable hour of photography and exploration.

Below are the best of the photos I took.

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Same one below just a different angle as i was trying to get the color changing effect in the wings.

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Back lit from the sun… this guys was I think taking a nap and was enjoying the warm rays.

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These Owl eye butterflies were everywhere! Spooky since they are looking at ya!

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And one rare turtle butterfly… camouflaged to look like a scary big snapping turtle…

Thanks for looking!

Negatives to Digital Photos

Recently I was looking through a photo book of photos from my past. Trip to D.C., Space camp, an air show in Reno, a road trip in Nevada with my family. Years ago when there was no such thing as a digital camera and to capture your memories was to have a real camera with real film and once you took that photo you would have to wait for the film to be processed to find out if the picture even was a good photo, or if you captured what you were intending to photograph. It was magical, frustrating sometimes, and once you had the photo it was the only one you had. Unless of course you wound have reprints… no way to share on the internet and send all your friends this special moment it time.

In the back of the book were negatives, A LOT of negatives…and to my surprise in good condition. Some I tried to peer through with my eye… but it was hard to make out…. so I built a shoe box negative back light. I took some digital photos of the negative with the back light and used photoshop to bring back a collection of photos (some never seen).

One of my father and I at an airshow.

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Reno Nevada, 1989

One of my friends and I at Space Camp. It was a blast, rediscovering these photos and I wanted to share.

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Here is the process…. Take the digital photo of the negative, load the JPEG into Photoshop, inverse the photo, and then auto correct the colors and balance.

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Inverted and color balanced…

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I am now looking for other negatives to transform them into digital, sharable and memorable photos from the past.

Even a photo going back to my childhood room, as one of my Favorite pastime (and still is) building with my LEGO bricks collection.

IMG_1450Precrop, digital photo of the negative.

lego white houseOne of the many houses I built.

lego houseIt is like going back in time AND now I can share these great memories!

A New year… a new me!

1968 BMW 2002
1968 BMW 2002 and My wife and I

This was the “ABOUT ME” from my current blog:

“William Davison Jr  recently moved from Northern Nevada to the Denver, Colorado area to work in the aerospace industry after obtaining his electrical engineering degree from University of Nevada, Reno. He keep busy with his many hobbies (old BMW car restorations, LEGO Robotics and Halloween effects/costumes). He loves to restore, make and create. If he isn’t doing something in the shop, then you can find him riding his 1956 BMW R50 motorcycle.”

Painful….It sounds like I am trying to get a job, or an intro for a resume or something… really bad after I re-read this paragraph… and so… I want to redo this introduction to who I am… with the real William.

Maybe something like this:

“A fanatic LEGO building, oscilloscope using, wrench turning, moon watching, air in the face riding, charcoal drawing, paper mache sculpting, tube amp repairing, upright bass playing, woodworking, electronic circuit designing, music listening, swing dancing, making my wife laugh, world traveling, vintage loving, photo taking, not afraid to try anything, lover of life.”

This will be my shitty first draft but I can add more as I think about who I really am…

My blog title “Turns out…  I am crazy!” has a bunch of meaning behind the title. I am always trying something new: making, creating, building, fixing, riding, writing, working, struggling, loving, achieving, photographing, learning, cooking, cleaning… and everything else under the stars… just to make sure I get it “all in” before I must move on to see my maker.

The real reason behind all of this “doing”… I have lost so many amazing and special people in my life that I want to make sure I don’t let them down…  I lost very close friends… these close individuals are the ones I try to live to the fullest for… they are the ones who didn’t get to come home and have a life after the Marine Corps, find a warm heart and live out the rest of the years with an understanding that “earning it” (stealing a line from “Saving Private Ryan”) really means earning it! I want anyone who looks at my life and my adventures, my goals and my achievements, to see a full and wonderful life. One “life” that wasn’t wasted with regret, blame, worry or self pity.

As for the Blogging 101 homework, I will follow the general questions. As an engineer I like the requirements, questions, problems to be straightforward and easily obtained, thus (the solutions) my answers below are provided:

“who I am and why I’m here”

  • Why am I blogging publicly, rather than keeping a personal journal?

I would like to think that my information I provide in some of my DIYs, photographs and vintage motorcycle repairs and how they are documented might inspire or help others who might be searching for the same topics and interests that I have. If a repair photo can help someone else … GREAT! If they like Halloween as much as I do and they are looking for a craft project… SWEET!

  • What topics do I think I’ll write about?

My current topics have included: Vintage motorcycles, Halloween, Crafting, Photography, Christmas movies, DIY Invites, decorations and effects. Rebuilds, repairs, driving events, cake making, fun days out on the motorcycle, and even party trivia. Like I said about my title “Turns out… I am crazy!” kinda covers my source of topics… ALL OVER THE PLACE!

  • Who would I love to connect with via my blog?

Anyone interested in new things, living life and enjoying all the possibilities that this great universe has given us small humans a chance to explore. Learning, creating and doing something if fun and I want to share that with anyone who see a value in doing new things, open to everything and living life to the fullest!

  • If I blog successfully throughout the next year, what would I hope to have accomplished?

At least a blog a week, and topics of interest that might lead to a resource for a DIY book of projects… similar to a “MAKE Magazine” http://makezine.com/

And with that i feel like I have accomplished a pretty decent “who I am and why I’m here” post… please feel free to comment or ask me any other questions. Have a great Day and go do something fun!

Eagle Globe and Anchor Cake

As a Former US Marine, I like to celebrate the Marine Corps birthday with my friends (Also Marines) at a small tavern, with a toast, the Commandant’s Message, a cake cutting ceremony (Following tradition) and remembering all of our past, present and future Marine Corps brothers and sisters.

This year I was set on making a cake that everyone would remember… An Eagle Globe and Anchor Cake in the form of the U.S. Marine Corps official emblem and insignia.

I started out with the basic shapes, cake mix and an idea.

Starting out with the cake basics!
Starting out with the cake basics!

After cooling the cake and cutting it into the major shape, it started to take good form.

Basic blocks of the cake.
Basic blocks of the cake.

Frosting… lots of frosting.

Cover with base coat of frosting.
Cover with base coat of frosting.

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Details and chocolate coins.

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Everyone had a good time, and made fun of my “betty Crocker” home maker cake… but they didn’t say a word while they were enjoying the great cake.

I will have to think hard for next year and make another memorable cake to share.

Happy 239 years Marines! Semper Fi!

Halloween Invites done!

Well this year I waited too long before working on my invites… but I buckled down last night and finished up a vintage looking invite for my annual Halloween party.

Not my best and most creative invite, but I think a very nice looking none the less.

Below is the cover… a spooky scene with a full moon (which we won’t have the luxury of having this year near halloween), a flying witch and a Jack-o-lantern with a nosy cat!  (of course not my artwork but two different ones put together, postcards) The corn stalks and sky with the black, orange and white clouds reminds me of the simpler time in the halloween of yester year that I remember growing up with. The decorations were hung in the classrooms and we as kids made construction paper owls, bats, ghosts and ghouls… ah the good ol’days!

Cover of the 2014 invite.
Cover of the 2014 invite.

Inside I left the pumpkin and cat… giving just enough information to get the point across and keep it simple…

Inside of invite.
Inside of invite.

I wanted to have an elaborate invite with cool steampunked theme… gears that turned, a banner with an old timey feel giving the invited guest a feel of the 19th century’s British Victorian era… a feel like the party would be all the rage and an event that is not to be missed… but now looking at my invite… I feel a vintage, more real and more my style invite shaping up.

I will print, cut out and glue each into a folded sheet of construction paper, letting me relive my days again of fall, elementry school and the excitement of being a kid during Halloween!