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So you've got one oscillator.  Great, now build another.  Now have the second feed into the first.  Fun.  
So you've got one oscillator.  Great, now build another.  Now have the second feed into the first.  Fun.  


In this class, we get around to Frequency Modulation, Ring Modulation, Gate/Sync, Pulse waveforms, and ghetto Amplitude Modulation.  We'll also learn about the importance of buffering.  LED's will blink rhythmically.
In this class, we get around to Frequency Modulation and gate/sync modulation.  We'll also learned about the importance of buffering.  LED blinked rhythmically.
 
Slides, without nearly enough pictures or comments: [[Media: modulation.pdf]]
 
== Day 3: Amplification and Filtration ==
 
Here we go a little bit analog.  Using a 74hc04 chip as a buffer/amplifier, we start to get non-square waves.  An amplifier with a capacitor in its feedback loop makes a nice lowpass filter. 
 
(Elliot says: I didn't write out notes for this workshop, and just kind-of winged it.  It wasn't stellar.  We'll probably need to re-visit some of this later anyway...)
 


== Day 4: Sequencing, Clocking ==
== Day 4: Sequencing, Clocking ==
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Using a low-frequency as a clock source, we'll drive a counter which drives a multi-way switch.  Point the switch at different resistors = different pitches = 8-step sequencer.  Mayhem?  Music?
Using a low-frequency as a clock source, we'll drive a counter which drives a multi-way switch.  Point the switch at different resistors = different pitches = 8-step sequencer.  Mayhem?  Music?


Here's the slides from class:  [Media: sequencing.pdf]
Here's the slides from class:  [[Media: sequencing.pdf]]
 
== Day 5: Ring Modulation and Sync ==
 
[[Media: ringMod.pdf]]
 
 
 
== What's Next? ==


== Day 4: Amplification and Filtration ==
This wiki page is still being worked on.  What should we do next week?


Here we go a little bit analog.  Using a 74hc04 chip as a buffer/amplifier, we start to get non-square waves.  An amplifier with a capacitor in its feedback loop makes a nice lowpass filter.  Here, we'll also do some real Amplitude Modulation.
Ideas:


* Re-visit the LM386 and make ourselves a nice line-level amplifier/speaker combo that'll run on batteries and provide us with a good source of 5v.


== Onward ==
* Revisit the 74HC04 and work on filters some more


At this point, you're going to know most of what I do.  No more learning, only discovering...
* Ghetto ring modulation and pulse sync


* Voltage control (?)





Latest revision as of 02:42, 15 May 2009

Overview

The Noisemaker Workshop will teach you how to build noise-making electrical devices from the ground up. We'll be mostly building our own gear, but we'll also borrow a couple tricks from the glitch/bender tradition.

This workshop series involves soldering, (ab)use of digital CMOS chips for analog ends, a smidgen of electronics knowledge (provided), and plenty of noise. You bring the musical sensibility (not required).


Day 1: Getting Oscillating

This class focuses on the 74HC14 logic chip and how it can be used to make a square-wave oscillator. By using a light-dependent resistor in the feedback loop, you can control the pitch by waving your hands around.

Media: NoisemakerWorkshop_Day1.pdf

Day 2: Modulation

So you've got one oscillator. Great, now build another. Now have the second feed into the first. Fun.

In this class, we get around to Frequency Modulation and gate/sync modulation. We'll also learned about the importance of buffering. LED blinked rhythmically.

Slides, without nearly enough pictures or comments: Media: modulation.pdf

Day 3: Amplification and Filtration

Here we go a little bit analog. Using a 74hc04 chip as a buffer/amplifier, we start to get non-square waves. An amplifier with a capacitor in its feedback loop makes a nice lowpass filter.

(Elliot says: I didn't write out notes for this workshop, and just kind-of winged it. It wasn't stellar. We'll probably need to re-visit some of this later anyway...)


Day 4: Sequencing, Clocking

Using a low-frequency as a clock source, we'll drive a counter which drives a multi-way switch. Point the switch at different resistors = different pitches = 8-step sequencer. Mayhem? Music?

Here's the slides from class: Media: sequencing.pdf

Day 5: Ring Modulation and Sync

Media: ringMod.pdf


What's Next?

This wiki page is still being worked on. What should we do next week?

Ideas:

  • Re-visit the LM386 and make ourselves a nice line-level amplifier/speaker combo that'll run on batteries and provide us with a good source of 5v.
  • Revisit the 74HC04 and work on filters some more
  • Ghetto ring modulation and pulse sync
  • Voltage control (?)


Resources

  • "Handmade Electronic Music: The Art of Hardware Hacking" is a very good dead-tree book on DIY sound hacking. If you've got money to drop on it, it's worth it. You can probably con me into lending you my copy for a week or so. It's a quick read, but you could spend months replicating his projects.
  • For pushing the limits of tolerable noisemaking, The Cacophonator is pretty cool, and uses some of our tricks. It gets a lot of noise out of a single 40106/74hc14 plus the circuit-bender trick of current-starving the chip.


Note: many of these resources require translating from old 4000-series CMOS into lower-voltage 74hc00 series chips:

  • 40106 -> 74hc14 (Inverter with Schmitt trigger)
  • 4051 -> 74hc4051 (8-channel switch)
  • 4040 -> 74hc4040 (Binary Counter)