Introduction: Turn Nearly Anything Into a Speaker

You canful act nearly any object into a speaker aside using a piezo disc and a handful of extra components. While this may seem like magic, there is actually a rather needled technical explanation. By driving a piezo disc using an amplifier, the disc vibrates and so resonates the sound wave through whatever object the disc is attached to. When the object vibrates, it disturbs the air and makes fit. This is not only a play trick, but also allows for a lot of interesting experimentation and creative projects.

Step 1: Materials

To Turn Closely Anything into a Speaker you bequeath need:
(x1) Audio output transformer
(x1) Small Amplifier*
(x1) Small project enclosure
(x2) 1/8" mono jacks
(x1) Piezo disc element
(x1) One and only-sided 1/8" male mono cable***
(x2) 1/8" phallic-to-male person mono (or stereophonic) cable
(x1) Double-sided tape

* It has been brought to my care that the Radioshack test adenylic acid I misused is no longer available since they went extinct of commercial enterprise. You mightiness nevertheless be able to detect it on Ebay. This nonpareil that is connected should work as replacement.

To connect the amp's output to the piezo I recommend just purchasing a distaff jack adapter, and conjunctive wires between the adapter and one of the bolshie and hopeless pairs of verbalizer output ports in the back (bootleg-to-ground, and red-to-left). Then plug the piezo cable into the female adapter.

*** This type of cable has a plug happening one final stage and a signal and ground wire on the other end. If you can't find one, then just buy some old male-to-male mono cable and cut out one end, and dismantle out the insulating material to expose the wire.

Please note that few of the links on this page contain Amazon consort links. This does not change the price of any of the items for sales event. However, I earn a small commission if you click on whatsoever of those golf links and buy anything. I reinvest this money into materials and tools for future projects. If you would like an cyclical suggestion for a supplier of any of the parts, please let me know.

Step 2: Holes

Make a mark centered upon each of the 1" x 2" sides of the project enclosure.

Drill both of these marks with a 1/4" drilling bit.

Step 3: Wire the Jacks

Seize 3" illegal wires to the kernel barrel pin of to each one, and 3" red wires to the pin connected to the outer signal tab.

Step 4: Wire the Transformer

Since the transformer is basically two coils in proportion to incomparable another, the only affair to be mindful of is aligning the wires when they are soldered.

Solder unrivalled set to the outermost pins on one side of the transformer, and the other set reflected connected the opposite side. The colors of the wire should be aligned.

Trim the center pins on the transformer. We are non victimization these.

In a schematic, a transformer is represented by a double-descent center surrounded by cardinal coils.

Measure 5: Slip in the Jacks

Insert the jacks into the climbing holes in the enclosure.

Make annotation of which jack is connected to the face of the transformer labelled "P". This stands for principal.

Typically the capital is the stimulant side, but we are actually driving the transformer backwards, so the underived face is our output to the piezo.

The intellect the input is the outturn is because of impedance, a concept we are not really covering in this class, but 1 particularly important when dealings with transformers and Actinium electronics. Hourlong story short, impedance is kind of comparable resistance in Alternating current electronics (but not exactly the Lapp). Typically, audio sources have a high impedance of a few thousand ohms, and speakers get a low impedance around 8 ohms.

The audio production transformer is designed to film a high ohmic resistance source and pull through low pressure impedance. However, we have the opposite problem we motivation to solve. The piezo is typically a high impedance gimmick, and the audio frequency amplifier is forever providing a low impedance signal to drive a speaker. In order to campaign the piezo using the amplifier, we need to take the low-pitched impedance output from the amplifier and make information technology high impedance. To do this, we simply send the lowly impedance signal from the amplifier into the low resistivity coil, and this will produce a high impedance signal to cause the piezo. Simple As that.

Footprint 6: Glue (facultative)

Calorific glue the transformer to the base of the enclosure. This is non entirely requirement, but will ensure it does not accidentally get burst.

Step 7: Close Information technology Improving

Surrounding the case with its mounting screws.

I recommend that you use tape, a sticker, nail enamel or a marking to indicate the turnout on your inclosure to eliminate guesswork. In my lawsuit - or should I articulate on my case? - I incised a piece of white taping into a immature arrow.

Tone 8: Conducting wire the Piezo

A piezo disc is basically a metal disc with a special piezoelectric ceramic covering. This is a special type of material that expands and contracts when electricity is applied, and can too develop electricity when swollen and contracted.

IT is antithetical than a verbalizer in that it does not use some coils or magnets, but has some similarities. Like a verbaliser, it can work as a transducer to some turn sound into a electromotive force and voltage into a dependable.

To be able to drive the piezo disc, we offse need to attach it to an 1/8" mono cable.

Solder the middle signal wire from the cable television service to the solder blob connected the center of the piezo disc.

Solder the outmost shielding wire to the solder blob happening the gilded outer ring of the disc.

Trim away whol of the excess wire leads.

Step 9: Connect Cables

Hack the piezo disc conducting wire into the output side of the natural enclosure (well-connected to the primary), and connect a male-to-male mono (OR stereo) cable system into the stimulus side of the enclosure.

Step 10: Amp

Connect the input from the transformer enclosure into the production from the amplifier. This connection enables the amplifier to drive the transformer.

Connect any audio player into the input exploitation a mono (Oregon stereo) cable.

Step 11: Tape

Apply two teentsy pieces of double-sided tape to the flatbed side of the piezo disc.

Step 12: Stick the Piezo Onto Something

Once everything is pumped functioning, stick the piezo onto a surface that you want to make music.

Don't block to turn the amp on, and the volume up.

Step 13: Dumbfound the Piezo Onto Everything

Vex the piezo onto any item you want and discover its hidden musical potential.

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