ASR Envelope Generator of Caspar Ockeloen-Korppi
ASR Generators Low Frequency Oscillators

ASR Envelope Generator of Caspar Ockeloen-Korppi

ASR Generator with siplified logic portion of the circuit by combining Decay and Release into a single control

Overview

Files

Bill of materials

Description

The ASR envelope is a static envelope generator with loop feature. In envelope mode, it generates the same envelope shapes as a normal ADSR envelope, however, the Decay and Release rates are controlled by a single control named Release. The envelope has traditional RC charging/discharging (exponential decay) shapes, ideal for driving a linear VCA, modulating lter cuto, etc. While it is not be the fastest envelope in the west, or in any cardinal direction for that matter, it is reasonably snappy with a 1.5ms minimum attack time.

In loop mode it becomes a basic LFO with rates ranging from 3 seconds up to 170 Hz governed by the Attack and Decay settings.

Files

Project schematics / ASR Envelope Generator of Caspar Ockeloen-Korppi
Title Version Creation date Copyright notice Software Download link
Плата (оригинальная версия)

Принципиальная схема получена из открытого источника находящегося по адресу: https://kassu2000.blogspot.com/2018/10/asr-envelope.html

0.9 2/27/2019 Каспар Окелоен-Корпи DipTrace Schematics Download PDF
Панель (оригинальная версия)

Панель (оригинальная версия)

0.9 2/27/2019 Каспар Окелоен-Корпи DipTrace Schematics Download PDF

Bill of materials

Плата (оригинальная версия)
# Value Quantity Designator Comment
Semiconductors
1 1N4148 5 D1, D2, D3, D4, D5
2 2N3904 1 Q1
3 TL074CN 1 U1
Resistors
1 1m 3 R1, R11, R4
2 1k 4 R10, R7, R8, R9
3 2k2 1 R12
4 10k 2 R13, R3
5 22k 1 R14
6 4k7 1 R15
7 100k 2 R2, R6
8 220k 1 R5
Capacitors
1 1nF 1 C1
2 1uF 1 C2
3 10uF 2 C24, C30
4 10nF 1 C3
5 .1uF 2 C4, C5
Inductances
1 Ind 2 L1, L2
Other
1 2.54/2P 4 J1, J3, J5, J7
2 3.96/3P 1 J2
3 2.54/3P 2 J4, J8
Панель (оригинальная версия)
# Value Quantity Designator Comment
Semiconductors
1 Red LED 1 LED1
Variable Resistors
1 1M Lin 2 VR1, VR2
2 100k Lin 1 VR3
Other
1 2.54/2P Female 4 J1, J4, J7, J8
2 Jack In 2 J2, J3
3 2.54/3P Female 2 J5, J6
Switches
1 SPDT 1 S1
Caspar Ockeloen-Korppi
Author:
Caspar Ockeloen-Korppi

Finnish SDIY enthusiast

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