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paper_synth:ps808kd [2014/08/23 00:02]
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----- +===== Paper-Synthesizer 808KD - Kick Drum Module ​=====
-**Paper-Synthesizer 808KD - Kick Drum Module\\ +
-Functional Clone of Tr-808 Bass Drum** +
----- +
-by Antti Pussinen and Wolfgang Spahn\\+
  
 +**A Functional Clone of the Tr-808 Bass Drum**\\
  
-The sound of 808 bass drum is one of the most recognizable electronic instruments. It is The sound of 80´s hip hop and electro and one of the most cloned and copied electronic musical circuits of all time. A number of Masters and Phd works have been built around the clever functionality of this particular circuit and it is a good starting point in learning analog percussive sound synthesis.+The sound of [[https://​en.wikipedia.org/​wiki/​Roland_TR-808|808 bass drum]] is one of the most recognizable electronic instruments. It is The sound of 80´s hip hop and electro and one of the most cloned and copied electronic musical circuits of all time. A number of Masters and Phd works have been built around the clever functionality of this particular circuit and it is a good starting point in learning analog percussive sound synthesis.
  
-{{ :​paper_synth:​808_bass_drum_2504b_1000.jpg?400 |}}+{{ :​paper_synth:​ps808-rackversion.jpg?300 |}}
  
 This board is a functional clone of the circuit, using contemporary replacements for op-amps and transistors. in the module are controls for Accent, Decay, Tone and Level, like in the original. it has a trigger input and a sound output with a jack connector and possibility to use external accent input. All the known modification points are marked in the paperboard. This board is a functional clone of the circuit, using contemporary replacements for op-amps and transistors. in the module are controls for Accent, Decay, Tone and Level, like in the original. it has a trigger input and a sound output with a jack connector and possibility to use external accent input. All the known modification points are marked in the paperboard.
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 The circuit consists of trigger input conditioning,​ bridged-t type oscillator with a separate filter circuit for decay control of the sound, passive lo-pass filter, and a swing type voltage controlled amplifier. The circuit consists of trigger input conditioning,​ bridged-t type oscillator with a separate filter circuit for decay control of the sound, passive lo-pass filter, and a swing type voltage controlled amplifier.
 +
 +{{ :​paper_synth:​808_bass_drum_2504b_1000.jpg?​400 |}}
  
 When a short electric pulse is fed in to the circuit, it transfers that pulse into a sound. The circuit is full of cool and elegant design tricks. For example the voltage of the trigger pulse, called accent in the original TR-808, changes all the parameters of the sound to make the sound feel like more loud or accented, thus making variable dynamics in the drumming possible. When a short electric pulse is fed in to the circuit, it transfers that pulse into a sound. The circuit is full of cool and elegant design tricks. For example the voltage of the trigger pulse, called accent in the original TR-808, changes all the parameters of the sound to make the sound feel like more loud or accented, thus making variable dynamics in the drumming possible.
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 ---- ----
-**Paper-PCB:**\\ +==== Paper-PCB ​==== 
-{{:​paper_synth:​808_kick_drum_module_02b.jpg?100|}}\\ +{{:​paper_synth:​808_kick_drum_module_03.jpg?200|}}\\ 
-{{:​paper_synth:​808_kick_drum_module_02.jpg?100|}}\\+{{:​paper_synth:​808_kick_drum_module_03.ai.zip|}} 
 + 
 +== Old Versions ==
 {{:​paper_synth:​808_kick_drum_module_02.ai.zip|}} {{:​paper_synth:​808_kick_drum_module_02.ai.zip|}}
  
 ---- ----
-**Schematic:**\\ + 
-Original:\\ +==== Faceplate ==== 
-{{:​paper_synth:​808_kick_drum_original.jpg?​100|}}+{{:paper_synth:​ps808kd_faceplate_10.jpg?​200|}}\\ 
 +{{:paper_synth:​ps808kd_faceplate_10.ai.zip|}}\\ 
 +==== Schematic ==== 
 +{{:​paper_synth:​808_kick_drum_original.jpg?​100|}}\\
 Modified Version:\\ Modified Version:\\
-{{:​paper_synth:​808_kick_drum_modified.jpg?​100|}}+{{:​paper_synth:​808_kick_drum_modified.jpg?​300|}}\\
  
 ---- ----
-**Components:**\\ +==== Components ​==== 
-  * Resisors: ​1 x 220Ohm, ​1 x 1kOhm, ​1 x 2,​7kOhm, ​3 x 4,​7kOhm, ​1(+1) x 6,​8kOhm, ​1 x 8,​2kOhm, ​4 x 10kOhm, ​3 x 22kOhm, ​2(+1) x 47kOhm, ​1 x 82kOhm, ​5 x 100kOhm ​+1, 1 x 470kOhm, ​3 x 1MOhm+  * Resisors: ​1x 220Ohm, ​1x 1kOhm, ​1x 2,​7kOhm, ​2x 4,​7kOhm, ​2x 6,​8kOhm, ​1x 8,​2kOhm, ​5x 10kOhm, ​1x 15kOhm, 3x 22kOhm, ​2x 47kOhm, ​1x 82kOhm, ​5x 100kOhm, ​1x 470kOhm, ​3x 1MOhm
   * Transisors: 5 x BC 546, 1 x BC 556   * Transisors: 5 x BC 546, 1 x BC 556
   * OpAmp TL072P   * OpAmp TL072P
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   * Diode: 3 x 1N4148   * Diode: 3 x 1N4148
   * 1 x LED Low Current (2V 1mA)   * 1 x LED Low Current (2V 1mA)
-  * Potis: 100KOhm lin (LEVEL), 500KOhm lin (DECAY), 10KOhm log (TONE), ​47KOhm ​(TUNE), (additional:​ 10KOhm (TUNE ENVELOPE) & 100kOhm (ACCENT))+  * Potis: 100KOhm lin (LEVEL), 500KOhm lin (DECAY), 10KOhm log (TONE), ​50KOhm ​(TUNE), (additional:​ 10KOhm (TUNE ENVELOPE) & 100kOhm (ACCENT))
   * 6,35mm Jack Socket, mono   * 6,35mm Jack Socket, mono
-  * 2 x 8 Pin Socket+  * 19 Pin Socket 
 +  * IC-Socket 8 Pin 
 +  * Button
  
 +----
 +==== License ====
 +
 +The PS808KD - Kick Drum Module was designed by **Wolfgang Spahn** 2013-21.\\
 +It is licensed under a [[http://​creativecommons.org/​licenses/​by-nc-sa/​4.0/"​|Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License]].
 +
 +<​html>​
 +<a rel="​license"​ href="​http://​creativecommons.org/​licenses/​by-nc-sa/​4.0/"><​img alt="​Creative Commons License"​ style="​border-width:​0"​ src="​https://​i.creativecommons.org/​l/​by-nc-sa/​4.0/​88x31.png"​ /></​a> ​
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 +
 +----