ADSR

Simple low cost envelope generator with re-trigger

This Eurorack-format ADSR envelope generator includes a re-trigger input for multiple triggers -- while the gate input is high. If you don't have a keyboard or MIDI-CV with a trigger output, you can use the ADSR TRIG input for synchronous attacks and modulation effects, triggered by a master clock signal. Envelope generators with trigger inputs, were typical in some older analog synthesizers, such as ARP and EMU.

Attack time: 1mS to over 5s
Decay time: 1mS to over 12s
Sustain level: 0 to 10V
Release time: 1mS to over 12s
Output level: 0 to 10V
Gate threshold: 2.5V
Power: +12VDC @ 3mA, -12DC @ 2mA using standard (Doepfer, etc.) 16-pin connector
Panel width: 7 HP (35.24 mm)

"Skiff friendly" Depth: Only 1.4" with power cable (single PCB using SMT parts)

Features
“TRIG” input for re-triggered attacks
Logarithmic potentiometers for A, D, R
High-quality anodized aluminum panel
User selectable 'gate' from power-bus -- using PCB shorting jumper
Low power consumption

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