This is an additive synthesizer where you can change the timbre using a mixer made of merely pencil and paper. Why buy variable resisters when you can build one virtually for free?

Step 1: Parts List

Parts You’ll Need:
-3 alligator clips
-22 awg solid core wire
-Solderless breadboard
-9V battery
-battery clip
-7805, Voltage Regulator
-2 Synchronous 4-bit counters (74HC193N)
-7555 Timer
-4 1kΩ resistors
-1 LED
-1 1µF capacitor
-speaker and audio cable or headphones
-graphite pencil and paper
<p>Can u write the code for using the graphite strip with an arduino to play tones from the tones.h library. I will be very thankful to you. Please. </p>
You call that a breadboard? That's not a breadboard, now that's a <a href="http://img708.imageshack.us/img708/7615/p7100104.jpg" rel="nofollow">breadboard</a>!<br> <br> Check it out, an old <a href="http://i.imgur.com/ncGSR.jpg" rel="nofollow">light theremin</a> I made. Power was applied at the left, and a speaker goes between ground and some point up by those transistors. By waving your hand over the photocell you change the pitch of the sound.
One of our instructors made a <a href="https://www.circuitlab.com/circuit/qkjv7t/extreme-fun-light-controlled-7555/" rel="nofollow">light controlled astable oscillato</a>r that was rather extreme in its frequency ranges, and how fast it moved. Perhaps someone could make a dubstep style bass controller this way.&nbsp;<iframe frameborder="0" height="315" src="http://www.youtube.com/embed/OFUSKdIfXxI?list=UUXtDOxEvCQg-bw7tRs4uqHA" width="560"></iframe>
Looking at the schematics and the way you connect 2 4bit counters, would it be possible to make a 16-step sequencer by adding 2 more of those 4bit counter modules? Would it be possible to switch between 4, 8 and 16?
our students make 8 and 16 step sequencers using the 4-bit counter and 8:1 analog multiplexers, similar to <a href="http://www.digikey.com/product-detail/en/DG408DJ-E3/DG408DJ-E3-ND/2621718" rel="nofollow">these</a>. &nbsp;hmmm. &nbsp;time to make another instructable! :)

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Bio: Music Technology at NYU Steinhardt is a leading and internationally recognized program in music, sound and audio technology. Students prepare for successful careers in sound ... More »
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