Based on the CEM3310/AS3310 ADSR envelope generator IC

3310 ADSR Envelope Generator

The 3310 ADSR Envelope Generator Eurorack PCB and Front Panel Kit is a compact and efficient envelope module based on the classic CEM3310/AS3310 IC. Designed for reliability and expressive control, it delivers smooth and precise Attack, Decay, Sustain, and Release shaping for a wide range of synthesis applications.

This module is a cost-effective way to add a high-quality ADSR envelope to your Eurorack system while maintaining professional performance and intuitive operation.

Key Features

• Eurorack PCB and front panel kit
• Based on the CEM3310/AS3310 ADSR envelope generator IC
• Full ADSR control with dedicated potentiometers
• Built-in envelope activity LED for visual feedback
• Bus gate compatibility via Eurorack ribbon cable
• External gate input overrides bus gate automatically
• Compact 6HP format
• Front panel made from PCB material, screen printed by hand

Envelope Control & Functionality

With four dedicated knobs for Attack, Decay, Sustain, and Release, this module allows precise shaping of modulation signals for:

• VCAs
• Filters
• Oscillator modulation
• Dynamic articulation and movement

The onboard LED provides real-time visual feedback of the envelope’s shape and timing.
Gate Input & Bus Compatibility

The module supports gate signals via the Eurorack power bus, reducing the need for extra patch cables in compatible systems. When a jack is inserted into the gate input, the internal bus gate is automatically disconnected, allowing seamless switching to an external gate or trigger source.
DIY Build & Front Panel

This is an intermediate-level DIY kit, suitable for builders with some soldering experience. The PCB layout is optimized for reliability and ease of assembly.

The front panel is fabricated from durable PCB material and hand screen printed, matching the aesthetic and build quality of other Guru Gara Synth Eurorack modules.

https://gurugarasynth.com/products/3310-adsr-envelope-generator-eurorack-pcb-and-front-panel-for-diy-synth