Introduction: Big Axe Bass - Tool Using Animal Instrument of Mass Intonation

Speak softly and carry a big shtick. Reflect on the musings of our street philosophizer Tool Using Animal. Poetry with a driving beat...and beatitude. That's what this manly thumping stick is for. Pump out the rhythym and be one with the universe(of course, you might need a Stargate gong to accent the harmony).

From it's humble beginnings as an old replacement tire tube long forgotten on the garage shelf and pieces of scrap lumber collecting dust, make this instrument of mass intonation, The Big Axe Bass. OK, it only has one "string" but it sings in the lower registers.

Add a simple piezo pickup to this and amplify the signal to broadcast to those beyond earshot "Behold the Big Axe Bass of Righteousness, make one to spread the groove, as long as it is not rap...maybe disco too"

WARNING: Do not crank the amp up to 11. May signal Armageddon and/or your nasty neighbor who doesn't appreciate good music at three in the morning. Subsonic booms do carry further in open environments.  Has not been used to stun fish. Word.


Note: Video was taken with one hand holding the camera while the other hand was playing with the Big Axe Bass set down on a table.  I had tried to chew gum at the same time and it didn't work.

BLUE LIGHT SPECIAL:  FOR THE FIRST THREE  PEOPLE TO POST A VIDEO IN THE COMMENTS OF THEM PLAYING A BIG AXE BASS THATTHEY MADE, I WILL GIVE  A 3-month PRO MEMBERSHIP from my stash from being featured a lot.  BONUS POINTS TO THE ONE I THINK MOST CREATIVELY MODS THE BASIC DESIGN, YEAH, KNEX MIGHT WORK... EXTRA BONUS POINTS FOR PLAYING IT DRESSED UP LIKE GENE SIMMONS FROM THE ROCK GROUP KISS.

Step 1: Shoplifting List

One bicycle inner tube - doesn't really matter if you prefer schrader or presta valves or if the tire can hold air or not.  Mine was actually sitting on a utility shelf in the garage for about 20 years or more, that's the last time I rode my little red Bottechia road bike.  I guess I am not as crazy as I used to be when I was riding around in the streets of Brooklyn...wait...

A long piece of wood 1"x3"x6'. Fancy if you have oak or another exotic wood.

Another scrap of wood, a block 2"x4"x"6" or whatever cutoff you have to act as the bridge of our bass guitar.

A cardboard box  big enough to make a reasonable facsimilie of an axe head.

Piezo buzzer pickup - I'll show you how to make one
(piezo buzzer, shielded 2 conductor cable or speaker wire, 1/4" plug to fit instrument input jack on instrument amplifier or female 1/4 jack to fit instrument cord to amplifier)

Soldering iron and solder( Lead and earthquake warning for residents of California, tag not to be removed under penalty of law)

Instrument amplifier - may work plugged into a set of computer speakers, haven't tried to see how well the piezo pickup works on the mic or line input of a computer sound card.

Some black or red construction paper, glue

Aluminum duct sealing tape to mimic the metal edge of the axe

No woodworking skillz or tools necessary, hopefully


CAUTION: Working with sharp tools is only fun when no one gets hurt. Exercise care and know how to use your tools. Wear eye protection.
 

Step 2: Get the Buzz


Create your own piezo pickup so you can plug this monstrosity into an instrument amplifier.

Piezo buzzers contain an unique crystal wafer that when current is applied across it, will vibrate making a sound. If you vibrate the crystal with sound, it will generate an electronic signal that can be amplified.

I had an old carbon monoxide detector waiting to be recycled so I was able to gut out the piezo buzzer from there. Yeah, yeah, the CO detector module itself is scary to be near but you can always get a spare piezo buzzer from an electronics store.  Here are some tidbits and this if you  happen to hack a smoke alarm.

I cracked my piezo buzzer open to take a look at the piezo element.  The case was pried open with just a screwdriver.  Some may be glued or fused together.  

Just solder leads to the ground and hot, marked on the case with the corresponding wire to your instrument plug or jack.

The plug outside or "ring", the bigger part will be the ground.  The tip or core is the hot.

If you are using shielded coax type cable, the outer braided sheath will be ground and the inner filament will be hot.  Paired speaker wire will have one wire marked or a different color so you can reference what you are using as ground or hot.

I used a bit of heat shrink tubing to insulate the solder joints so they will not contact when compressed inside the plug shell and act as a strain relief on the piezo pickup.  Use the big part of the soldering iron and hold it close to heat up the shrink tubing or use a heat gun.  Heat guns are cheaper than hair dryers and do a great job of blasting intense heat.  Worth getting as a tool.

I tried to use the pickup with the case intact but the buzzer case was not transmitting enough sound.  I removed the front shell of the case and just taped the piezo assembly together.  The wires were already soldered to the case pins and just needed to be pressed up to the piezo disk element to make electrical contact.

Step 3: Assembly Required

This might be the most dangerous step of the instructable.

If you do not have a good grip on your wood, you essentially turn it into a projectile causing bodily harm. You will end up with a serious harpoon gun.

Hardwood is preferable to soft woods.

Using one hand, hold on to your stick firmly.

At the far end of the stick, put the rubber on top so as to hook the end of the tire.
The valve can be sticking up at one end.

Pull down and hook the tire on the other end. You will need to stretch the tube so that it will fit. Once it is on, if there is a lot of slack, the rubber tire may be too big and the length of the wood too small. Conversely, if your wood is too big and the rubber tire too small, then you may need a bigger size. I think mine was average and fit just right *sigh*.

You might want to sand the ends of the wood stick a little bit to keep it from abrading the rubber tire.

Take your wood block and place it about 2/3rds down from whatever you pick as the top of the instrument.  Put it under the rubber tire to lift it off the surface of the stick.  This is the bridge of your bass guitar.  The bridge is held in place by the compression of the rubber tire.  It also alows you to adjust it if necessary or lets you move it to experiment with the instrument.

Place the piezo pickup right under the tire and on top of the bridge.  I found it best that the tire contact the pickup for best sound.

Step 4: Put an Edge on It

Here is the axe murderer part.

Make a faux axe head to place as a decorative element to your fine instrument.

Take a piece of cardboard and just freehand something that looks like the shape of an axe head.  Go with the standard ACME axe head design or medieval double-headed axe, adze, etc.

Cut the axe head shape out.

Glue about 4 or five layers of cardboard to build up the thickness.

Trim off the excess cardboard using your original cutout as a guide.

Alternate the direction of the cardboard grain of each layer for additional strength.  You can also piece together small pieces of cardboard since the layers are laminated.

Rip off the skin of one side of the cardboard to cover the raw edges of your cardboard stack.

Cover with construction paper glued on.

Cover the grinded part of the blade with aluminum duct sealing tape.  I ripped one edge of the tape so it would look more feathered in where the edge is ground. 


Step 5: Rock On

Place the axe head under one end of the instrument.

You can glue or tape it on if you are worried about it falling out when you're heavily rocking a steady beat.

Plug it into your amplifier of choice.

Experiment with processing the sound if you have some effects pedals.

The rubber tire can be thumped, picked, plucked, slapped, played with mallets, drumsticks, sharpies, pencils, played on both sides of the bridge, has multiple "stretch" tunings.

Can be played upright or make a guitar strap with another bicycle tube.

Discover the possibilities with this simple instrument.

So, there you go, the Big Axe Bass, that's how we rock and roll.

Comments

author
Pumpkin$ (author)2010-10-22

Pickups=?

author
caitlinsdad (author)Pumpkin$2010-10-22

Not sure what your question/comment is.
Regular electronic coil guitar pickups/transducers cannot be used because there is no moving metal parts like the string vibrating above it. The guitar string here is the rubber inner tube. The piezo element acts like a microphone picking up the sound vibrations to amplify.

author
Pumpkin$ (author)caitlinsdad2010-10-22

That's literally what I meant, I didn't know how it functioned without a metal string..


author
abadfart (author)Pumpkin$2011-08-02

the piezo uses the vibration of the body to generate the sound

author
ilpug (author)Pumpkin$2011-05-28

i wonder what it would sound like if you put guitar strings inside the inner tube...

author
ilpug (author)2011-05-28

oak is an exotic wood?

author
caitlinsdad (author)ilpug2011-05-28

Only if you read that sentence real fast.

It would be a finer instrument if you use a better quality/grade other than pine. Oak has more figure/grain and is denser. Exotic woods are usually not stocked by the home centers where they only carry the more common pine, spruce, fir, maple, oak, poplar.

author
ilpug (author)caitlinsdad2011-05-29

ok, gotcha. Oak is a great wood to build stuff out of, but when i think of exotic wood i think of zebra wood or mahogany or something. its all good.

author
Hibatchi cow (author)2011-02-20

i am really wishing i had a souldering iron right know. I'd get one but my budget sucks.

author
ilpug (author)Hibatchi cow2011-05-28

solder with a lighter and a nail. super ghetto, but it works.

author
Tool Using Animal (author)2010-10-23

I'm honored.

Slightly dismayed and scared.

But mostly honored.

And as such, I'll match Caitlinsdad's offer.  3 free months on top of his 3 for the first 3 videos.

PS.  CD, lemme know who those 3 are in case I forget.

author

Tool is way too cool.

author

Nobody's stepped up? Sad, I'm going to have to expire my offer. Sorry folks, gonna send them out to some cyberfriends.

author

That's fine, seems no one bit on the others I also put up. Maybe there needs to be an instructable on doing something you saw in an instructable and how to post back that you did it. Oh wells. If you need a few codes to pass on, lemme know, I have no cyberfriends *sigh*

author

I"m your cyberfriend. ~sniffle~

Thanks, but I have years worth. I could be registered free through March 2014 if I wanted.

author
doubleshockz (author)2010-10-28

nice now i can chop wood and play music at the same time.... i like this u got my vote

author
caitlinsdad (author)doubleshockz2010-10-28

Thx, You gotta have the chops for it.

author
rhoddity (author)caitlinsdad2010-11-07

*facepalm*

author
jeff-o (author)2010-10-22

+10 points for use of humorous innuendo. LOL.

author
caitlinsdad (author)jeff-o2010-10-22

* in Southern drawl, not that there's anything wrong with that * Why jeff-o, whatever do you mean?

author
Lithium Rain (author)caitlinsdad2010-10-27

Ah resemble that there re-mahk.

author
caitlinsdad (author)Lithium Rain2010-10-27

But I reckon you were always a question mark,...well, at least questionable.

author
altair ibn la ahad (author)2010-10-20

needs better pickups

author

Gotta fool around with where to place the pickup. My digital camera taking a video doesn't have a mic-in so direct recording would have sounded much better. But hey, an essentially "free" pickup if you have the parts.

author

i had one on my custom strat but my dad sold it

author
noahh (author)2010-10-19

Very well done. I have been working on making a contact mic from a piezo disk, and when I finish, maybe I'll try something like this.

author
caitlinsdad (author)noahh2010-10-19

It is very simple to do. I think you can solder directly onto the disk itself. It is pretty sensitive when you crank up the amp.

author
noahh (author)caitlinsdad2010-10-20

The biggest problem is that the only amp I have (and the only one I can afford) is a hacked RadioShack 9-volt pocket amp, and it's so bad that it's often hard to tell whether my project doesn't work or if it's just the amp.

author
The Ideanator (author)2010-10-19

Very nice, I can see a very sweet instrument coming out of this with some tweaking and multiple channels/pickups.

author

I guess you can also go traditional washtub basin acoustic. Cutting the tube would have gave me thinner rubber bands to work with, probably a better tone.

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