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paper_synth:ps808kd [2014/08/22 23:51]
admin created 		paper_synth:ps808kd [2022/02/10 22:17] (current)
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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-808kd-aug2014:​808_bass_drum_2504b_2000.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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 The building system is based on working methods of both of the artists, in field of sound and visual art. The Basic building block is the stripboard/​prototyping board and the circuit is laid on top of that as a printed paper sheet. One then assembles all the components per printed circuit design. In the era of copy-paste also synthesizer circuits can be produced in large numbers with a help of a printer and easily developed further.\\ The building system is based on working methods of both of the artists, in field of sound and visual art. The Basic building block is the stripboard/​prototyping board and the circuit is laid on top of that as a printed paper sheet. One then assembles all the components per printed circuit design. In the era of copy-paste also synthesizer circuits can be produced in large numbers with a help of a printer and easily developed further.\\
  
 +----
 +==== Paper-PCB ====
 +{{:​paper_synth:​808_kick_drum_module_03.jpg?​200|}}\\
 +{{:​paper_synth:​808_kick_drum_module_03.ai.zip|}}
  
 +== Old Versions ==
 +{{:​paper_synth:​808_kick_drum_module_02.ai.zip|}}
 +
 +----
 +
 +==== Faceplate ====
 +{{:​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:\\
 +{{:​paper_synth:​808_kick_drum_modified.jpg?​300|}}\\
 +
 +----
 +==== Components ====
 +  * 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
 +  * OpAmp TL072P
 +  * Capacitors: 4 x 15nF, 220pF, 33nF, 3 x 100nF
 +  * Elkos: 33µF ,1µF, 2 x 0,47µF
 +  * Diode: 3 x 1N4148
 +  * 1 x LED Low Current (2V 1mA)
 +  * Potis: 100KOhm lin (LEVEL), 500KOhm lin (DECAY), 10KOhm log (TONE), 50KOhm (TUNE), (additional:​ 10KOhm (TUNE ENVELOPE) & 100kOhm (ACCENT))
 +  * 6,35mm Jack Socket, mono
 +  * 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]].
 +
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 +----