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33 lines
2.3 KiB
Markdown
33 lines
2.3 KiB
Markdown
# ADSR module with voltage controllable Sustain level and Release time.
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I wasn't using the CV-Features of my VCADSR module at all so I cut out all of the unnecessary CV-parts. At the end I was still left with a pretty big schematic, so I started to reduce it. The finished module now has the following features:
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Attack: Sets the Attack time.
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Decay: Sets the Decay time.
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Sustain: Sets the Sustain level. This can be controlled externally with a control voltage on the SUS input.
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Release: Sets the Release time. This can be controlled externall with a control voltage on the CV input.
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GATE: Gate input, main input to use the module, goes into the decay and sustain phases while this input is high.
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TRG: Trigger input, the module starts the Attack phase regardless in which phase the module currently is.
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EOC: End-of-cycle output, this output becomes high at the end of the release phase.
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OUT: ADSR output.
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LOOP: Loop switch, re-triggers the module at the end of the release phase. Same effect as connecting EOC to GATE or TRG.
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Hacks:
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Slew Rate Limiter: While the module is in the sustain phase, an external signal can be applied to the SUS input. A slewed version of this signal is output at the OUT jack. The "DECAY" knob controls the slew rate.
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The module that you see in the picture above is using circuit boards that were fabricated by [PCBWay](https://www.pcbway.com/). They have excellent build quality and I can recommend using their service to build your own projects! I used the "Black" option for the soldermask and the surface has very deep and glossy black finish, which looks amazing, they also have an option for a "Matte Black" finish which I will try next time. Thank you PCBWay for sponsoring this module. They have very fast response times, not even 20 minutes after uploading the Gerber files I received an E-Mail notifying me about an error in my design (turns out I didn't complete the outline of a board). Afterwards I could re-upload the files and it all worked out. Their chatroom is also readily available, all my questions regarding pricing, delivery and technical details were answered right away in the chat!
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