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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.
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 enough pictures or comments: [[modulation.pdf]]
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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Here's the slides from class:  [[Media: sequencing.pdf]]
Here's the slides from class:  [[Media: sequencing.pdf]]


== Day 4: Amplification and Filtration ==
== 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?


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)